Definitions
- Event times: UTC (precision: 1 second)
- Coordinates: Equatorial, J2000 (precision: 0.01 deg)
- Sky map is centered on RA=180deg
- Longitudes are negative toward West
- Image size on Pan-STARRS and SkyMapper: 0.05deg x 0.05deg
General information
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Notifications
For most streams, the notifications are sent as soon as the detection of the new transient is announced. In order to reduce the amount of information to a reasonable level, optical transients are only announced when their type is classified and announced via the Transient Name Server (TNS). This is often only done after additional (spectroscopic) observations, thus introducing a delay between the source detection and the Astro-COLIBRI notification that can range from hours to days (sometimes even weeks/months).
- GRBs : Fermi and Swift alerts (incl. names and identification)
- Neutrino : IceCube, AMON (e.g. Nu-EM coincidences), and SuperK supernova alerts
- GW : Advanced Ligo / Advanced VIRGO / KAGRA alerts (as soon as O4 starts)
- Burst : INTEGRAL and HAWC detections, FRBs, ...
- SNe : optical transients characterized as supernova
- OTs : optical transients not classified as SNe (e.g. novae, CVs, TDE, AGN, etc.)
- Bright OTs : optical transients (SNe and OT) with magnitudes < 18 (i.e. a subset of the two categories above)
- Astro-COLIBRI announcements : News, updates and down times
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Legend of observatories and event types
- Color scheme used to identify various observatories:
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- Marker styles used to identify various types of events and sources
- FRB: Fast Radio Bursts
- OT: optical transients (e.g. novae, CVs, TDE, AGN, etc.)/li>
- SN: classified supernovae
- GRB: gamma-ray bursts
- burst: unclassified transients
- neutrino: high-energy neutrino
- GW: gravitational wave
- nuem: coincidence between neutrinos and high-energy gamma rays
- 4FGL: GeV gamma-ray sources in the Fermi-LAT catalog (4FGl-DR3)
- TeVCat: TeV gamma-ray sources in the TeVCat catalog
- SGR/AXP: soft gamma-ray repeaters / anomoulus X-ray pulsars
- Color scheme used to identify various observatories:
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Image credits
- We use images from the following sources:
- - NASA
- - DESY, Science Communication Lab
- - IceCube Observatory
Release history
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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
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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
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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
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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.)
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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
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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
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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
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Version 1.1.1 (2021-09-29)
- Fixed bug in user registration
- Setting event times to UTC
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Version 1.1.0 (2021-09-21)
- Improved cone search that is flexible for future improvements
- Filter settings are now synchronized between devices
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Version 1.0.0 (2021-08-17)
First public release (incl. first public Android and iOS applications)