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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. See the documentation for help with subscribing to or submitting Circulars.

Search for Circulars by submitter, subject, or body text (e.g. 'Fermi GRB').
To navigate to a specific circular, enter the associated Circular ID (e.g. 'gcn123', 'Circular 123', or '123').
Advanced Search

To narrow the search results, use advanced search syntax. This allows for specifying which circular field to search (submitter, subject, and/or body). For additional information, refer to the advanced search documentation.

Lucene Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

28 results found.

  1. GRB080310, late-time photometry with LBT
  2. GRB080310, LBT and MDM photometry
  3. GRB080310 : Lulin Optical observations
  4. GRB080310, unusual slow decay in the optical
  5. GRB 080310: GAO 150cm telescope Optical Observation
  6. GRB 080310: ROTSE-III Observations of Optical Counterpart
  7. GRB080310: Optical observation by MITSuME telescope
  8. GRB080310, optical observations with the LBT
  9. GRB 080310: PAIRITEL detection and PAIRITEL+KAIT+UVOT SED
  10. GRB 080310: early RAPTOR multicolor observations
  11. GRB 080310, Swift-BAT refined analysis
  12. GRB 080310: Swift-XRT refined analysis
  13. GRB 080310: Swift/UVOT Refined Analysis
  14. GRB 080310: Redshift from Keck/DEIMOS Spectra
  15. GRB 080310 - SDSS Pre-Burst Observations
  16. GRB 080310: Enhanced Swift-XRT position
  17. GRB 080310: RRM optical photometry with the VLT
  18. GRB080310, detection of break in optical
  19. GRB 080310: VLT/UVES spectroscopy
  20. GRB080310, optical observations with LBT
  21. GRB 080310: Magellan redshift revision
  22. GRB 080310: Lick/Kast Spectroscopy
  23. GRB 080310, SMARTS optical/IR afterglow observations
  24. GRB 080310: REM observations
  25. GRB 080310: Magellan redshift
  26. GRB 080310 afterglow candidate (correction to UT time)
  27. GRB 080310: Swift detection of a burst with optical afterglow
  28. GRB 080310 afterglow candidate

Advanced

Download all Circulars as a .tar.gz archive:
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