Version 2.31.0 (2026-08-28)

• Home screen widgets for Android and iOS
• Astro-COLIBRI now lives on your home screen: keep an eye on the transient sky without even opening the app
• "Astro-COLIBRI" gives an overview of the last 24 hours with a breakdown per event type, covering the events that match your filters
• "Latest discoveries" shows every new event in the sky, marking the ones that match your own filters
• "Observable tonight" lists what is up at your observatory, with each target's visibility window and peak altitude, and "Watchlist" the events you saved
• Every widget comes in several sizes, follows your colour theme and your app language, and is also available on the iOS Lock Screen. Tapping an event opens it right away in Astro-COLIBRI.
• Content refreshes roughly every 30 minutes and requires a verified Astro-COLIBRI account
• The Astro-COLIBRI Kafka broker: Astro-COLIBRI now publishes its own alert stream, so your pipeline can react to an event the moment Astro-COLIBRI does
• Five topics are available: astrocolibri.all.JSON, astrocolibri.all.VOEvent, astrocolibri.important.JSON, astrocolibri.important.VOEvent and astrocolibri.heartbeat. Every alert is published in both formats, so you subscribe to the one you already work with rather than to both.
• The "important" topics carry every newly detected event plus the updates that change the science of one, such as a refined localisation, a new classification or a measured redshift. The "all" topics publish the complete record.
• Alerts stay on the broker for 24 hours over a TLS-encrypted and authenticated connection, and your read position is remembered, so a client that restarts picks up where it left off
• The Python client is one command away: "pip install astro-colibri". It returns alerts as JSON or as canonical IVOA VOEvent v2.0 objects.
• Create your credentials with "Request broker access" in the Astro-COLIBRI menu; see the new broker documentation page for details
• Fermi-LAT Light Curve Repository integrated into Astro-COLIBRI
• Long-term gamma-ray light curves of more than 1500 sources of the Fermi-LAT 4FGL catalog, from 100 MeV to 100 GeV, are now available directly inside Astro-COLIBRI
• Open it in one tap from any Fermi 4FGL catalog source and from the FLaapLUC alerts associated with one
• Choose the binning (3-day, weekly or monthly), photon or energy flux, a fixed or free photon index, and the minimum test statistic
• Upper limits, 3σ outliers and points closer than 20° to the Sun are flagged, and can be hidden or removed from the export
• Export exactly the data you are looking at as CSV or IVOA VOTable. The same query is available through the API, which returns the cleaned and flagged data points as JSON together with a validation figure.
• Cone searches now cover the full localisation region of poorly localised alerts
• For events with an extended sky localisation (gravitational waves, Fermi-GBM, IceCube, MAXI) the search runs inside the full 90% localisation region instead of a simple circle. Events without such a localisation keep the standard 10° circular search.
• The searched region can be enlarged directly on the sky map with a small margin control (−/+ in 1° steps, up to 20° around the contour)
• Also available through the API via the extended /cone_search endpoint
• Interactive long-term visibility of any source at your observatory
• A new interactive plot shows darkness, moonlight and daytime windows for any period up to a year, replacing the external, static MPIK visibility tool
• Timetables can be copied or exported as ASCII, CSV or JSON
• Galaxy cross-match reworked: the search for a transient's host galaxy uses an updated set of catalogs and presents its results per catalog
• GLADE+ replaces GLADE v2.3: 22.5 million galaxies all-sky, with distances, stellar masses and a per-galaxy binary-neutron-star merger rate (catalog)
• DESI Legacy Surveys DR8 photometric redshifts: 1.6 billion sources, the best chance of finding a faint host (catalog)
• SDSS DR16 quasars: 750,000 spectroscopically confirmed quasars (catalog). PGC / HyperLEDA, 2MRS and the 2MASS extended source catalog remain available, and any VizieR table can be queried by name.
• A summary of the closest informative match gives separation, redshift, distance and projected offset in kiloparsecs
• Direct links per match to SIMBAD, NED, VizieR, the Legacy Survey viewer and Aladin. The Aladin link opens with both the transient and the galaxy marked, named and colour-coded.
• Every match now has an image cutout with the transient's position and localisation uncertainty marked, and the catalog source marked at the centre
• Gravitational-wave alerts
• The parsing of LIGO/Virgo/KAGRA alerts switched to the GCN JSON notice format
• VOEvent downloads remain available for GW events: Astro-COLIBRI reconstructs a VOEvent in the familiar LVK schema
• GW sky maps are archived in Astro-COLIBRI's own storage, so localisations stay available independently of GraceDB
• Alerts coincident with an external detection now name the reporting observatory, the type of the coincident event and the time difference between the two
• MAXI/GSC X-ray transient alerts: unknown X-ray transients detected by the MAXI/GSC instrument on the ISS are now ingested
• Added to the "Other high-energy" observatory filter group, with their own markers, and the localisation uncertainty (circular, elliptical or rectangular error region) drawn on the sky map
• Announced via the "burst" notifications stream
• When a GCN circular later identifies the source, the event is automatically renamed and reclassified (e.g. to a gamma-ray burst)
• NMMA light-curve fitting extended with a comparison of several models
• Fit up to 16 models on the same event in a single request and rank them by Bayesian evidence (log Bayes factor), with dedicated overlay light-curve and corner plots
• Five kilonova models joined the eleven supernova templates, and the fits now run on NMMA 1.1.0. Existing fits were re-processed with the new version.
• The service is described in detail in W. Kiendrébéogo et al., "NMMA - Astro-COLIBRI: An Automated Light-Curve Supernovae Classification Service in the Multi-Survey Era", submitted, arXiv:2608.17568
• Minor improvements and bug fixes
• GeV flares from AGN (FLaapLUC) are now part of the Fermi observatory: their alerts are Fermi events with the instrument "LAT-FLaapLUC", selected through a FLaapLUC sub-filter of the Fermi observatory filter instead of separate "FLaapLUC" entries
• General filters now work in cone searches: catalog sources (4FGL and TeVCat catalogs, X-ray binaries, IceCube IceCat neutrinos) stay in the results unless they genuinely fail a criterion, and the general sub-filters can be used to refine cone-search results. As a reminder, the general filters apply on top of the event-type and observatory filters and let you select events by visibility from your observatory (declination range), distance to the Sun, alert broker (GCN, TNS, CBAT, Fink, ...), follow-up programs (RAPAS, KNC, BHTOM, H.E.S.S., Unistellar), and show or hide retracted events.
• Updated TeVCat catalog of TeV gamma-ray sources, now 337 sources, 21 more than before, with increased redshift coverage, distances in kiloparsecs for Galactic sources, and more precise source classes
• New figures for Fermi-LAT 4FGL catalog sources: a "flux vs. spectral index" figure similar to the one shown for TeVCat, and a combined figure with the spectral energy distribution from 50 MeV to 1 TeV next to the 14-year yearly light curve, showing at a glance whether a source is steady or flaring. All catalog figures load about three times faster.
• More precise source classes and filtering for catalog events: Fermi-LAT 4FGL now distinguishes BL Lacs, FSRQs and blazar candidates instead of grouping them as "AGN", and TeVCat has dedicated sub-filters for shell-type supernova remnants, pulsars, superbubbles and massive star clusters
• The "last modified" time of an event and the event archive now change only when the event's core information actually changes; updates of the event metadata (image URLs, photometry, etc.) are no longer tracked
• GRB optical afterglows: the archival comparison sample was merged from four catalogues and now shows upper limits correctly, and the extrapolation of the afterglow brightness can be configured for a selected filter band
• The AI-assisted extraction of follow-up observations from GCN circulars is now available as an open-source Python package, astro-colibri-circular-parser, and is described in F. Schüssler et al., "AI-Assisted Extraction of Follow-up Observations from GCN Circulars in Astro-COLIBRI", submitted, SciX
• Einstein Probe transients announced in a GCN circular without a preceding notice now create their own event, with the WXT and FXT positions kept apart so a follow-up no longer overwrites the trigger position and time
• Retraction notices from CHIME/FRB and DSA-110 are now applied to the retracted event
• Updated access to solar activity data from NOAA
• Improved the stability of the password reset e-mail links, the parsing of Fermi-GBM retraction notices, and the recognition of IceCube source names and of obfuscated contact addresses in GCN circulars
• Many further bug fixes and behind-the-scenes improvements

Version 2.30.0 (2026-06-24)

• GRB optical afterglow lightcurves
• Photometric follow-up observations reported in GCN circulars are now automatically extracted (AI-assisted) and converted to a common Rc band
• A new lightcurve figure shows each GRB afterglow in the context of a large archival sample, updated with every new circular
• Fit the afterglow decay (broken power-law) and extrapolate its brightness to your planned observation time directly from the interface
• New documentation page describing GRB follow-up reports and the AI-based data extraction
• Observation reports and observatories
• Register your own observatory and manage its members and administrators
• Submit, edit, and browse observation reports from web and mobile, with filter choices matched to your observatory’s instruments
• All follow-up reports (from GCN circulars and from users) are shown in a unified, filterable overview for each event
• Reports and extraction also cover spectroscopic observations and redshift measurements in addition to photometry, each with its own filter category and icon in the reports overview
• Contact everyone who reported observations of a transient — whether via GCN circular or a direct Astro-COLIBRI report — to coordinate further follow-up
• Sign in with ORCID
• Register or log in to Astro-COLIBRI with your ORCID account, in addition to Google, Apple, and email
• If your ORCID email is public it is used automatically; otherwise you are asked once for an email and sent a link to confirm it
• Minor improvements and bug fixes
• Tilepy scheduling requests (via tilepy.com) are now tied to your Astro-COLIBRI account with a daily usage limit
• Update notifications: Astro-COLIBRI now tells you when a newer version is available, it shows your installed version next to the latest one, with a one-tap link to update on Google Play / the App Store. Important updates can be required.
• Events sharing a common association are now grouped into stacks of event cards
• Updated the options to share images and reduced figure sizes for faster loading
• Added a new direct link to the LSST@Fink portal
• Bulk download of selected events in IVOA VOTable format: choose between the Astro-COLIBRI JSON format and a VOTable containing the individual VOEvents (also available via the API with return_format='votable'); optionally include your watchlist events in the download
• The account details panel now shows which method you used to sign in
• Fixed tooltips blocking taps on mobile: external links (e.g. in the galaxy cross-match results table) and download buttons now respond to a normal tap, while help tooltips open with a long-press
• Improved handling of custom events: download your own custom events, and include them in cone searches (/cone_search) and event downloads (/event and /get_event_as_voevent endpoints, JSON + VoEvents)
• Refreshed this documentation website: restyled navigation that is now consistent across web and mobile, with figures and tables that scale correctly on mobile
• Various further bug fixes and behind-the-scenes improvements

Version 2.29.0 (2026-05-20)

• NMMA integration: kilonova/supernova light-curve fitting available from Astro-COLIBRI
• Cloud-based API for NMMA at https://nmma.live
• New fold-out NMMA section on web + dedicated tab on mobile
• Submit fully configurable fit of various SN/KN models to photometric lightcurves
• Browse and delete past fits from the user-menu (“NMMA Job History”)
• Astro-COLIBRI-styled plots: photometric lightcurve with fit results and full corner plot of all derived parameters
• Visibility assessment
• New visibility timeline graphic (non-science mode)
• New observatory overview and map
• Visibility plots now show the time of detection of the transient
• Custom observatories are now included in the multi-observatory plot
• Added all sites of the Las Cumbres Observatory and the CAHA observatory
• New notification stream for stellar flares
• Announcements of stellar X-ray and optical flares from stars observed by Einstein Probe and the LAST (Large Array Survey Telescope) network
• Events with the same name are now grouped together in a stack of event cards
• New figures for GRBs detected by Swift-BAT: fluence distribution and peak photon flux vs fluence compared to archival data
• Added hover effects to buttons in the web interface
• Added support for alerts produced by BOOM; ZTF and LSST alerts cross-matched with (i) gravitational-wave alert candidates consistent with a binary neutron star merger or neutron star-black hole merger and (ii) gamma-ray bursts detected by Fermi, SVOM, and Swift.
• Added support for BALROG reconstructions of GRBs detected by Fermi-GBM and announced via GCN circulars
• New sub-filter for the Fermi observatory allows to de-select these events
• Ingested all BALROG GCN circulars
• Added support for tilepy based observation plans using the BALROG localisation maps
• Filters
• Filter buttons for catalog event types are now only visible when useful, i.e. in the cone search view
• New event type filter group “MWL + MM” indicating alerts created from multi-wavelength and multi-messenger correlations. Sub-filters include the two types of alerts from BOOM and the previous neutrino-gamma ray correlations provided by AMON
• Added AAVSO photometry to lightcurve and CSV
• B, V, R, and I bands used by default + additional option to add all available filters to the photometric light curve
• Minor improvements and bug fixes
• Performance improvements
• Faster app startup and loading of events via deeplinks
• Listening to GCN circulars via Kafka stream
• Faster loading of watchlist events, planets/moon/sun characteristics
• Added more information about the solar activity and aurora forecasts + variable sun color indicates activity
• Deeplink can now load science mode of the interface
• Fixed missing events and black screen when loading the AR mode via an AR-deeplink
• Fixed color theme issues + updated colors used in the lightcurve figure
• Added “Fermi-LAT Analyses” as external link for high-energy neutrino events
• FRBs: Improved formatting of DM (dispersion measure) values for better readability on mobile + Default filter for Fast Radio Bursts set to DM < 300 pc/cm³
• Photometry summary merged into the lightcurve fold-out

Version 2.28.0 (2026-03-31)

• Login with Apple iCloud accounts
• Augmented Reality mode (Astro-COLIBRI AR)
• Improved stability and precision of the AR overlay
• Screenshots can now be taken via a dedicated button. They are saved locally to the image folder on your device and can easily be shared.
• A direct link that loads an event directly in AR mode can now be shared
• Visibility plots
• Streamlined the names of all visibility endpoints (previous names remain available until mid 2026), see API documentation for details
• Longterm visibility plot has now configurable start and end dates
• New multi-source visibility assessment: new endpoint ("visibility_plot_multi_source") allowing to calculate observability windows of several sources during the same time period. Very useful for observation planning and scheduling.
• Web and mobile interfaces use this endpoint to obtain an overview of the available visibility windows by selecting multiple sources (providing both a figure and JSON payload with full details)
• Web-browser notifications
• Notifications about new transient events can now be received directly in the web-browser.
• The configuration can be synchronized with mobile notification settings.
• The interface now helps avoiding duplicated notifications (received by subscribing to multiple overlapping streams)
• Improved integration into the landscape of Virtual Observatory tools
• Simple Cone Search: the cone search returns updated VoTable (including data origin fields, etc.). The endpoint has been validated (highest level of VO compliance: A++) and registered in the registry of the IVOA. This allows seamless access of Astro-COLIBRI transients in all VO compliant tools like ALADIN, etc.
• A new API endpoint /get_event_as_voevent allows downloading events available in the Astro-COLIBRI archive in the IVOA VoEvent format. This functionality is also available via our web interface.
• The data of the photometric lightcurves collected by Astro-COLIBRI can now be downloaded in IVOA VOTable format. A new API endpoint called /lightcurve_votable_from_csv allows the conversion of existing Astro-COLIBRI CSV lightcurve data.
• Creation of custom events that can be saved in the personal watchlist
• Minor improvements and bug fixes
• Updated configuration of the Astro-COLIBRI GPT
• Improved verifications of user authentication
• Landscape mode of the mobile interface is now showing the timeline of events
• Fixed duplication of event cards after the event name was modified
• GRB redshift update for all events. Now single events with multiple cards (multiple instruments detected it) have consistent information
• Redshift filter for GRBs added
• Improved real-time status messages of lightcurve calculation
• Various minor bug fixes, improvements and behind-the-scenes updates

Version 2.27.0 (2026-02-28)

• Mobile interface: Augmented Reality mode — point your device at the sky to visualize transient events and catalog sources overlaid on the live camera view
• New figure showing the fluence of GRBs detected by Fermi-GBM compared to archival data
• New notification stream announcing Fast Radio Burst detections within the last month
• Improved user account email verification
• Web interface: layout and choice of widgets are now fully configurable by the user
• Vera C. Rubin Observatory / LSST data integrated into photometric lightcurves (figures and CSV downloads)
• Minor improvements and bug fixes
• Filters can be reset to their default state individually
• Latest transients list is no longer loaded while in cone search mode (web)
• Added a Visibility Plot button to the tilepy observation planning screen
• Web version: when horizontal space is insufficient, the cone search/zoom and back buttons are automatically moved to the info area
• Web version: on small screen resolutions, some advanced features are hidden from the home page and remain accessible via a new dedicated button

Version 2.26.0 (2026-01-30)

• Enable authentication via Google for account creation and login (“sign-in with Google”)
• Updated the observatory filters: new colors assigned, added Einstein Probe, identified radio observatories, grouped filter for high-energy observatories
• Support for multiple languages: the interfaces are now available in English, German, French, Spanish and Italian
• Improved tilepy integration
• Observation plans of large uncertainty regions produced by tilepy (www.tilepy.com) are now available (in addition to GWs) for GRBs detected by Fermi-GBM and high-energy neutrinos detected by IceCube.
• A new screen allows to configure all major parameters used to fine-tune observation planning requests using tilepy
• Selected tiles are highlighted both in the skymap and the tilepy data table
• The observation plan can be updated by removing tiles from the list
• Host galaxy cross matching
• Complementing the Wise color-color diagram, you can now cross match the position of a selected event with catalogs of galaxies (or other astrophysical sources)
• A new screen allows to select from a range of catalogs or define your own (as long as the VIZIER service knows about it), define a search radius, summarize the results, jump to SIMBAD for details about found sources/galaxies/etc. and download the results
• Added default notification subscription for all users:
• Nearby SNe: the 1% closest supernovae (about 20 notifications per year)
• Special targets: very noteworthy events like the expected explosion of the recurrent nova T CrB or a Galactic supernova (less than 1 notification per year)
• Astro-COLIBRI notifications: special announcements of interest for all users (less than 10 notifications per year)
• These notifications can be disabled in the user settings
• Minor updates, bug fixes and improvements
• Added new parameter ‘discovery_flux_band’ to store the filter/band used for the discovery (information registered with the Transient Name Server)
• Added option to retrieve full event information from archival data via the /event endpoint
• Updated filters: added photometry sub-filters to ‘star’ event class and dispersion measure sub-filter for FRBs
• Added an overview of the evolution of the usage and user origins to the documentation page: https://astro-colibri.science/usersmapexamples
• Support for new IceCube astrotrack notices (cf. https://gcn.nasa.gov/circulars/43419) and retraction notices from SVOM
• Localisation contours are now displayed on the main skymap and not only in cone searches (science mode)
• Provenance of information: added GCN and FLaapLUC to list of identified brokers (enabling filtering via General filter)
• Web interface: Skymap width is more flexible and we added the option for users to change between an elliptical or round skyview as well as between the normal info area view or a table-like view similar to the app mode (cf. “map settings”). Also, the status bar is now interactive and allows to load the login or account information screen.
• Added a new system to monitor the progression of the lightcurve generation (science mode)
• Added a button to reset the filters to Astro-COLIBRI’s default settings
• Various other minor improvements and bug fixes

Version 2.25.0 (2025-12-02)

• Added “star” event class for stellar transient events (new filters, icons, etc.)
• LAST Observatory Integration: (details on LAST) Direct submission of events and LAST added to general broker filters and observatory filters
• Astro-COLIBRI nameserver: all transients events registered within Astro-COLIBRI are now assigned a unique identifier. It follows the scheme of the IAU Transient Name Server, i.e. it starts with ‘AC’, then a space, then the 4-digit year followed by a short code made of lowercase letters assigned in consecutive order using the time of registration within the platform (e.g. AC 2025abc).
• Photometric observations from the RAPAS Pro-Am network are now available to all users. The data can be added to the lightcurve figures and is then also included in the data download.
• Major update of the mobile app:
• You can now swipe between screens.
• Events on SkyMap are now selectable.
• Buttons for Zooming added (can be turned off in Map & Coordinate Settings)
• New area for Filters & Legends is added and can be seen when swiping from the left-most side on the first and second screens. The area is also accessible from Filters & Legends in the Menu.
• A new design of the info screen makes it easier to see the information.
• New clickable and swipe-able areas on the right side of the info screen contain additional information like photometry, external links or observation requests.
• All images can be enlarged now via a simple press and shared with a long-press.
• A new Release Screen was added, which will inform you of the newly added features.
• Minor updates, bug fixes and improvements:
• Performance improvements
• Extended searches for events via the /event and /source_details endpoints that are now accepting searches for additional identifiers and source names
• Added new category for TDEs to “magnitude vs redshift” figure
• New loading screen
• Fixed an issue reported in discussion forum
• Fixed a bug that prevented some older event from being loaded in the frontend
• Admin screens contain a loading indicator if data loading takes long
• H.E.S.S. ToO request: Moonlight observation is handled correctly
• Improved layout for tablet screens
• Improved TOM Toolkit integration: Users can now log in using an existing TOM token and change their credentials manually afterwards.

Version 2.24.0 (2025-09-28)

• Improved supernova handling
• New filters
• New filters allowing to select all main supernova types individually
• New filters allowing to filter events according to their redshift or the time difference with the peak of the lightcurve
• A new filter that selects extra-ordinarily nearby supernova events: a redshift cut representing the nearest 5% (1% for type Ia and type II) supernova is applied. About 25 events will be selected on average per year.
• New notifications
• Similar to the event filters, one can now select notifications for all main supernova types
• A new notification stream announcing very nearby supernovae has been added
• Improved photometry and lightcurve updates
• The duration for which the photometric measurements and the lightcurve figures for optical transients are updated has been improved. The updates are running at least once a day for the following events:
• All optical transients are updated for 15days
• Classified optical transients (incl. SNe, but also novae, TDE, CVs, etc.) are updated for 50days
• The rarest 5% (1% for type Ia and type II) nearby SNe are updated for a full year
• Photometry process improved: new columns ("mjd_nerr and mjd_perr") for averaged ATLAS data. Reduced load on the APIs of the large optical surveys by eliminating duplicated data requests.
• ToO requests:
• Implemented a VERITAS ToO Request Button and Widget for creating an automatically filled mail.
• Adjustments for the correct grb github format in HESS ToO requests.
• API changes
• Transients ("VoEvents") from all endpoints from the API (/event, /cone_search, /latest_transient, …) now contain the same set parameters. This ensures consistency for external implementations.
• ‘gw_contours’ and ‘map_areas’ are not provided by default, but they can be added via an option in the query parameters
• Minor updates, bug fixes and improvements
• TeVCat Catalog updated to it’s latest release
• Improved search for events in SIMBAD
• Improved landing page for small screens and smartphones
• Fixed the search for Astronomer Telegrams
• Added link to WISeREP providing spectroscopic information for classified optical transients
• FLaapLUC information is displayed in a separate script and area similar to lightcurves
• Improved access of the WISE color-color diagram
• Improvements for usage on slow internet connections
• Various behind-the-scenes improvements and optimizations

Version 2.23.1 (2025-07-18)

• Fixed an issue preventing login to the Astro-COLIBRI discussion forum

Version 2.23.0 (2025-07-07)

• Host galaxy information
• Added estimation of the host galaxy type using a color color figure based on data from the WISE infrared observatory (interfaces and API)
• Additional host galaxy information can be obtained via a new external link to BLAST
• Photometry
• The full photometry data used to produce the lightcurve figures is now saved in a CSV file. Download it via the "Download lightcurve data" button in the lightcurve view.
• Extracted photometry summary data: first, peak, and last observations from all filters in ZTF, ATLAS, and ASAS-SN.
• Implemented photometry sub-filter processing to filter fast-rising and fading supernovae and other sub-filters. The filtering process now supports dictionaries, lists, and scalar inputs.
• Enabled event filtering using this summary data in the graphical interfaces for all optical transients and in the API via the /latest_transient and /cone_search endpoints.
• User accounts
• Added acceptance of Privacy and Terms of Service during the account registration and via a pop-up and new indicator for existing accounts
• Added possibility to change account’s login (i.e. email address )
• Improved custom cone searches: easier choice and more flexibility for coordinate formats
• Improved search for events in mobile interface, which now allows to load a single event and switch to the time period around it
• Minor changes and bug fixes
• Moon display is now representing the actual moon phase and illumination fraction
• Reduced low significance FLaapLUC notification + added a sub-filter to filter these events
• Various bugs fixes: allow to resend account verification email, wrong sign of the declination in visibility meta-data, “Unknown parameter in the database” error in cone searches, catalog icons not displayed, missing messages when copying to clipboard, updated Fermi-GBM contours and lightcurve downloads, any many more
• Updated observatories registered with the IAU
• Mastodon account moved to a different server: https://mastodon.social/@astro_colibri
• New links to external platforms
• DAS: data aggregation service of the data central platform
• Legacy Survey: deep sky survey images from DESI
• Added link to GCN circular search results

Version 2.22.0 (2025-03-26)

• Added the sun and moon positions
• Enable the display of the sun and moon positions in the “Map & coordinates settings”
• Retrieve the position of the sun and moon in celestial and local coordinates via the new "/celestial_position" endpoint in the API
• New notification stream announcing well localized gamma-ray bursts, i.e. a subset of GRBs with uncertainties <= 10arcmin
• New sub-filter for GRBs allowing to select well localized bursts
• Added the Major Atmospheric Cerenkov Experiment Telescope (MACE) Imaging Atmospheric Cherenkov Telescope to the pre-defined observatories
• Dedicated interface for submission of H.E.S.S. ToOs
• Minor changes and bug fixes
• The web interface now adapts better to smaller screens or lower resolutions
• The menu screens in the App version now also have a header and a return button in landscape mode of the App
• Email registration with more than 4 characters in the domain name are now also accepted
• Improved handling of color schemes
• changed colors of close/cancel buttons if they are not the primary buttons. Buttons are now more uniform
• adapted TimePicker and DatePicker color scheme to Astro-COLIBRI
• adapted login screens to different color schemes

Version 2.21.0 (2025-03-04)

• Added transients registered via the Central Bureau for Astronomical Telegrams (CBAT),
• Added SVOM notices announcing GRBs detected by the ECLAIRs instrument
• Added alerts on gravitational waves from mergers including at least one sub-solar mass object
• API changes:
• The endpoint to calculate the source visibility (“/visibility_plot_daily”) now returns the detailed parameters of the visibility windows; this information is also accessible via the web frontend
• Added a new endpoint for the TeVCat and Fermi-LAT 4FGL catalogs, allowing the user to search by parameter or by cone search ("/tevcat" & "/fermi"); see this interactive notebook for details
• Added a new page to our website documenting our public events & outreach activities
• Enabled user configuration of new TOMs. TOMs (incl. the existing integration of BHTOM) are now dynamically handled in frontend and backend.
• Minor changes and bug fixes
• Event search in the web interface now allows to load the time period around the selected event
• Added option to change the value for the default reset time by long pressing the reset timeline button
• Added MOJAVE url for covered TeVCat and 4FGL AGN sources
• Added information indicating events followed within the Kilonova-Catcher network + new filter allowing to select these events

Version 2.20.1 (2025-01-24)

• Fixed a bug preventing autocompletion of source names in light mode (web)
• Added a loading indicator for cone searches (web)
• Added ToO submission for H.E.S.S. members (web)

Version 2.20.0 (2025-01-22)

• New search button added to the top row of the web interface
• Improved interface: now also working in landscape mode on smartphones and tablets
• Light vs science mode:
• New main switch between “light” and “science” mode in top row of the web interface
• Cleaner interface in light mode with easier to grasp information and less technical details
• Added a watchlist (registered users):
• Selected events will be displayed in the skymap and latest transients list independent of the filter settings or time period
• New features for TeVCat and 4FGL catalogs
• Additional parameters displayed for all 4FGL and TeVCat sources
• New filters for 4FGL and TeVCat sources
• Minor changes and bug fixes
• Default time period reduced to 7 days, configurable via the user settings (registered users)
• Number of selected events shown at the bottom of the event list
• New fields in the events (JSON format): image_urls: a dictionary pointing to additional figure for some events
• New figure added to all neutrino alerts and all entries of the IceCat-1 catalog
• Added distance filter for gravitational wave events
• Added confirmation check before submitting events to RAPAS and BHTOM
• Adapted to TNS v2.0
• Updated Tilepy integration to tilepy v2.5.0

Version 2.19.0 (2024-12-11)

• Improved optical lightcurves
• Combining multiple ATLAS observations
• Added upper limits (ATLAS and ZTF)
• Enabled custom lightcurves for arbitrary sky positions (i.e. independent of transient events)
• Enabled data from the RAPAS amateur astronomer network
• Updates of the TeVCat and 4FGL-DR4 catalogs
• TeVCat updated to latest version + 4FGL updated to DR4
• Added Beta vs Energy Peak plot for 4FGL sources with significance > 20
• Added Flux vs Spectral Index plot for TeVCat sources containing this information
• Minor changes and bug fixes
• Added button to download the information for the selected event in JSON format
• Team updated on the website
• Added link to the Lasair broker for transients detected by ZTF
• Improved requests to confidential information
• Added restricted group for CTAO/LST-1 (incl. submission of ToO requests)
• Various minor improvements and bug fixes

Version 2.18.0 (2024-10-31)

• Smart Home integration to enable visual alerts of incoming notifications
• Added all known classified optical transients available in the IAU database (Transient Name Server), previously our collection only started 01/2022
• Added new alert stream: IceCube searches for neutrino in coincidence with gravitational waves detected by LVK; notifications sent to the “neutrino” stream
• Added new catalogs to cone searches
• HMXB from HMXBwebcat
• LMXB from LMXBwebcat
• Minor changes and bug fixes
• Fixed color issues for the forum login screens
• Improved selection of a single day time range and the display of the timeline for short periods
• Added option to select the start time of the GW tiling schedule calculation
• Activated notifications for GRB notices from Einstein Probe

Version 2.17.1 (2024-09-07)

• Minor changes and bug fixes
• Submission of events to the RAPAS network is now using the correct user name
• Various minor improvements and bug fixes

Version 2.17.0 (2024-09-06)

• Added filters for instruments onboard major satellites: Swift, Fermi, SVOM
• Added alerts (via GCN/Kafka) from Einstein-Probe and Swift BAT-GUANO
• Minor changes
• fixing user filter modifications
• Various minor improvements and bug fixes

Version 2.16.0 (2024-07-29)

• API requests can now directly use the filter settings defined in the web/smartphone interfaces
• Extension of the /event endpoint to handle a list of events
• Top-10 events (compiled in collaboration with the Pro-Am network RAPAS) can now be downloaded
• Minor changes
• Lightcurves being updated once per day)
• Added link to the Xingming Sky Survey Project (XOSS)
• Various minor improvements and bug fixes

Version 2.15.0 (2024-07-15)

• Introducing optical lightcurves
• Daily updated lightcurves for recent optical transients
• Customized lightcurves using user-defined time ranges for all events
• Added localisation contours for IceCube Cascade events
• Added GRBs detected by the SVOM satellite
• Minor changes
• Improved sub-filters for classified optical transients
• Updated the Tilepy integration to v1.1.0
• improvements to layout and design
• Various minor improvements and bug fixes

Version 2.14.0 (2024-07-01)

• Introducing regular event updates from TNS
• Added change history to all events within Astro-COLIBRI
• Added date selection for tilepy scheduling, multi-observatory and longterm visibility
• Added GRB ToO observations by the H.E.S.S. high-energy gamma-ray observatory
• Minor changes
• New filter (within 'general') allowing to different follow-up networks
• Notifications sent with higher priority
• Added reset of date range to filtering in the app
• Reduced window around T CrB to reduce false alerts
• Bug fixes
• Event submissions to the RAPAS network
• Visibility figures not accessible for some smartphone users

Version 2.13.0 (2024-05-04)

• Introducing rate limits on the most computing and IO intensive endpoints (latest_transients and cone_search); see this forum post for details
• General filters: sources visible by the selected observatory, angular distance to the sun, retracted events, etc.
• Minor changes
• Use of GPT-4o for event descriptions
• Added Gemini North + South to observatories
• User defined duration of an observation for the tilepy scheduling plan of GW follow-ups
• Added direct link to scientific publications for each source on ADS/SciX
• Bug fixes
• Tilepy GW follow-up observation plans for radio observatories
• Display of GW events in timebar

Version 2.12.2 (2024-05-06)

• Added alerts stream for special targets: rare events that you don’t want to miss (e.g. the 2024 explosion of T CrB, a Galactic supernova, etc.)
• Added SNEWS supernova neutrino alerts: notifications sent to supernova, neutrino, Astro-COLIBRI announcements, and the new “special targets” stream
• Added user setting to adapt the precision of the displayed coordinates
• Bug fixes
• SuperKamiokande supernova neutrino alerts
• Observer location set from user settings
• Fixed crashes at startup of the interfaces

Version 2.12.1 (2024-04-23)

• Added Einstein Probe (WXT) detections
• Bug fixes
• Observatory filters

Version 2.12.0 (2024-04-17)

• Additional filtering options for gravitational waves and high-energy neutrinos
• Event descriptions via OpenAI/GPT-4
• Minor changes
• Events followed by Kilonova-Catcher (KNC) identified
• Improved tracking of app crashes
• New style for the app onboarding
• Bug fixes
• Synchronization and backup of filter settings
• Download of events in cone search
• Wrong error message during BHTOM submission

Version 2.11.0 (2024-03-15)

• Added support for the RAPAS network (submission of interesting events from the frontends + weekly list of most interesting transient posted in the Astro-COLIBRI forum)
• Added support for the BHTOM network (submission of interesting events from the frontends)
• Download the full filter settings defined in the interface as JSON file (science mode)
• Minor bug fixes and improvements
• Fixed opening of Unistellar deeplinks
• Added new event information: sun distance + follow-up campaigns
• Added support for multiple brokers (e.g. Ampel, Fink, etc.)
• Updated documentation

Version 2.10.0 (2024-02-28)

• Multi-observatory visibility plot: select multiple observatories around the world to efficiently plan your follow-up campaigns
• Opening the app from a notification now directly loads the announced event
• Introducing color schemes: choose between different schemes to customize the appearence of the interface

Version 2.9.1 (2024-01-19)

• first version of the Astro-COLIBRI GPT chatbot published
• bug fix: error circles in manual conse search
• improved performance of the web frontend in non-science mode

Version 2.9.0 (2024-01-15)

• Astro-COLIBRI discussion forum: https://forum.astro-colibri.science
• Exchanges about the latest events
• Helpdesk + direct contact with the developers
• Discussions of tools and equipement, astrophotography, fun stuff, ...
• New API endpoint “latest_transients” that allows to bulk download selected events, accessible via a new button in the web and mobile apps
• Changes to mobile interface
• Selected events are now illustrated with an image and their event type
• Enable toggle to show/hide external links
• Notification screen improved
• Minor bug fixes and improvements
• Fixed manual cone searches, rearranged widget and improved performance
• Naming and display of tilepy results fixed
• New notifications announcing well localized gravitational waves (90% area < 100deg2)
• Improved display of Unistellar citizen science events
• Added MeerKAT observatory
• Updated link to AAVSO with cone search in VSX
• Improved event descriptions

Version 2.8.0 (2023-11-17)

• New filtering system in the application and cone search API
• Added new events: optical transients directly after their detection, i.e. without waiting for their classification

Version 2.7.1 (2023-11-08)

• Cone searches around GRBs detected by Fermi-GBM now show the 50 and 90% contours of the GRB localisation (science mode)

Version 2.7.0 (2023-09-27)

• Improved the “science mode” and enabled it on the mobile apps
• Support for deeplinks
• An URL that contains the Astro-COLIBRI identifier allows to load a selected event
• Enables sharing of events (e.g. social media, exchanges with colleagues, etc.)
• If installed, the app loads instead of the web frontend when receiving a deeplink on a smartphone
• New pop-up window in the notification screen when notifications are disabled in the OS
• Minor improvements:
• Visibility plot now correctly handling event updates and multiple detections
• Improved event description text for Gw events
• Improved documentation of the API
• Improved and updated onboarding tutorial

Version 2.6.0 (2023-08-22)

• Added very bright SN candidates selected by the Unistellar Citizen Science program and the ALeRCE broker
• New notifications: “bright + early optical transients”
• Direct links to the Unistellar app to start follow-up observations
• Minor improvements:
• Private PanRadio group and notifications
• Added redding due to dust absorption and link to NED extinction calculator

Version 2.5.3 (2023-07-24)

• Link to new FINK API endpoint for cone searches within GW contours
• Bug fixes:
• Custom observatory selection working again
• GW contour are now displayed when selecting a scheduling tile

Version 2.5.2 (2023-07-08)

• New filtering of gravitational wave events
• Significant GW events
• Non-significant GW events
• Improved API documentation

Version 2.5.1 (2023-07-04)

• Gravitational wave follow-up
• Fixed loading of GW contours
• Dedicated configuration for GW scheduling with H.E.S.S.
• Improved account deletion procedure

Version 2.5.0 (2023-06-20)

• Gravitational wave follow-up
• https://tilepy.com
• new cloud-based API to calculate optimized follow-up schedule
• access from web and mobile frontends
• results integrated in event list and map
• Improved definition of custom observatories + more parameters
• Minor improvements and bug fixes

Version 2.4.2 (2023-05-31)

• Bug fix: notifications on Android 13
• Additional minor fixes
• GWs: display of maps, notifications
• Flexible custom observatory names
• FLaapLUC alerts

Version 2.4.1 (2023-05-24)

• Added IceCat-1 to cone search results
• Improved links to external platforms
• Reordered and shorter list for non-science mode
• Added link to TreasureMap (GW follow-up)
• Improved observability assessment
• added dedicated calculation for Victor M. Blanco telescope
• filename now contains the source name
• fixed bug related to custom observer location names
• Various minor bug fixes and improvements

Version 2.4.0 (2023-04-26)

• Improved user management and sign-up screens
• Use of GPS location for the observability assessment
• Searching for events via the manual cone search window now returns the full event information
• Preparations for the O4 gravitational wave observation run
• New notification streams for ‘significant alerts’ + ‘NS/NSBH events’
• More event parameters displayed
• Minor improvements and bug fixes
• Improved selection of GBM lightcurves
• Update to new NASA/GCN circular system

Version 2.3.0 (2023-03-10)

• Improved performance of the frontend
• Enabled “click and drag” of the maps in both the web and mobile frontends
• Enabled zooming of images in mobile app
• Added localisation uncertainties of archival sources (e.g. 4FGL)
• Added GBM lightcurves
• Bug fixes
• Fink cone search radius updated
• Link to AAVSO improved

Version 2.2.0 (2023-01-27)

• new VoEvent architecture (performance improvements + future proof / easier extensions + new functionalities)
• new API endpoint "event" to retrieve the Astro-COLIBRI information on an event
• improved documention of the API incl. an interactive tutorial: API documentation
• improved calculation of the observability figure (speed improvement allowing higher resolution of 1min, easier maintenance, etc.)
• new observatories: Parkes, CTA/LST
• improved notifications (identification of event updates, improved format, etc.)
• new alert stream: GRB detections by GECAM
• added IceCube event displays (if available)
• preparations of the O4 run of the gravitational wave interferometers
• Bug fixes:
  • visibility windows missing on the observability plot in some (rare) cases
  • re-enabled non-https urls on mobile devices

Version 2.1.2 (2022-12-21)

• Added VoEvent archive (XML and JSON format, accessible in the web frontend and via a new, public API endpoint 'voevent')
• New page highlighting a few use cases added to landing page: Usage examples
• Change of time range now directly affecting cone search results
• changed color for flares identified by FLaapLUC
• Bug fixes:
  • Filtering of cone search results (mobile devices)

Version 2.1.1 (2022-12-07)

• Improved creation of figures (bug fix + performance increase)
• New menu entry for contact and additional information in the mobile app
• Improved documentation of the public API endpoints
• Bug fixes:
  • Autocompletion of multiple detected sources
  • Contact email link on Android
  • Shifts in the timeline

Version 2.1.0. (2022-11-21)

• Improved performance: new cloud computing architecture + avoid recalculation of existing figures + reduced refreshes of the frontend
• Added a new alert stream: GeV flares from AGN detected by Fermi-LAT via the FLaapLUC pipeline (incl. new figures showing the latest results); see also FLaapLUC alerts
• Support for different coordinate systems (Ecliptic and Galactic) and different projections (Hammer-Aitoff, Mollweide, Mercator)
• Addition of a figure showing the Swift-XRT lightcurve for GRBs detected by Swift in the context of archival and VHE detected GRBs
• Added manual cone searches and ATEL search to the smartphone apps
• Various other improvements:
• Zoom in the latest transients map now triggers a cone search in that region
• Increased available archival transients: GRBs from Swift, Fermi and INTEGRAL since Jan/2016 + all public IceCube neutrino alerts + all public HAWC and IceCube-HAWC alerts
• Selection/deselection of all observatories or event types
• Added link to ZTF viewer ‘SNAD’ + ALeRCE + improved link to FINK
• Onboarding more interactive
• Improved API documentation

Version 2.0.2 (2022-10-07)

• Display of localisation uncertainties of all transients
• Performance improvements: building of main widget reduced + switch to Flutter 3
• Bug fix: manual cone searches

Version 2.0.1 (2022-09-16)

• Bug fix: manual cone searches

Version 2.0.0 (2022-09-01)

• Major upgrade of the web interface
• Timeline of events to visualize temporal correlations and facilitates choice of time period
• Combination of event filters and legend
• Links to external platforms shown as cards (incl. logos and short descriptions)
• Introduced “Science mode” switching between event descriptions and observability information
• Direct access to custom searches for sources in arbitrary sky locations
• Artists illustration of the different transient categories
• General improvements
• added direct links to the Living Swift-XRT Point Source catalogue
• Bug fixes
• Update of Swift alerts were not working as expected
• Various minor bug fixes and improvements

Version 1.4.2 (2022-06-10)

• Added search for ATELs
• Bug fix: event filtering in the web frontend
• Treatment of non-GRB alerts by Swift

Version 1.4.1 (2022-05-18)

• Event information improved: additional parameters displayed + link to ALADIN includes uncertainty region + link to AAVSO lightcurves + TACH/GCN viewer
• Selection of date for visibility plot possible
• New notification stream for bright (mag<18) optical transients
• Onboarding/tutorial for the mobile app
• Switch to and from the legend improved on mobile app

Version 1.4.0 (2022-03-07)

• Enabling the definition and management of custom observatories
• Updated source catalog to 4FGL-DR3 and latest TevCat
• Additional information (SNe alerts from the SuperK neutrino detector, access to SkyMapper images, new observatory locations, source redshift information, etc.)
• Various bug fixes (Horizontal scrolling of links; custom observatory locations on mobile frontends; Access to filter settings (issues for some users existed); GCN parser stability issues; etc.)

Version 1.3.0 (2022-01-10)

• Added optical transients (SNe, novae, CVs, etc.) incl. new notification streams
• Updated marker styles
• Improved search for sources (cf. manual cone search)
• Added various new links to external services: weather information, sky view, ASAS-SN, Pan-STARRS, Gaia

Version 1.2.1 (2021-11-03)

• Added a catalog of SGRs and AXPs to the cone search
• Several corner cases for the daily visibility plot fixed (e.g. darktime around noon UTC, observations covering several days)
• Transients highlighted in cone search results

Version 1.2.0 (2021-10-21)

• Merchandise shop
• Added description of transients for the general public
• Galactic plane added to sky maps
• Added direct link to the science portal of the Fink ZTF/LSST broker
• Check for existence of external links
• Removed Fermi-GBM flight notices
• Design and layouts improvements + minor bug fixes
• Mobile app: new settings menu
• Web app: re-organisation of visibility plots + display adapted to different screen sizes

Version 1.1.1 (2021-09-29)

• Fixed bug in user registration
• Setting event times to UTC

Version 1.1.0 (2021-09-21)

• Improved cone search that is flexible for future improvements
• Filter settings are now synchronized between devices

Version 1.0.0 (2021-08-17)

First public release (incl. first public Android and iOS applications)