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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"

29 results found.

  1. GRB 130702A: RTT150 optical observations
  2. GRB 130702A in the Ep,i - Eiso plane
  3. GRB 130702A : Xinglong TNT continue optical observation
  4. GRB 130702A: Maidanak optical observations
  5. GMRT radio detection of GRB 130702A
  6. GRB 130702A: TNG spectroscopic observations of the emerging supernova
  7. GRB 130702A: P200 Spectroscopic Confirmation of Associated Supernova
  8. GRB 130702A: Maidanak optical observations
  9. GRB130702A: NOT observation - the detection of an emerging supernova
  10. GRB 130702A: Continued RATIR Optical and NIR Observations
  11. GRB 130702A: Xinglong TNT optical observation
  12. GRB 130702A: Continued UVOT Observations
  13. GRB 130702A: VLA detection
  14. GRB 130702A (= Fermi 394416326): correction of the GCN #14988 title
  15. GRB 130702A: WSRT radio detection
  16. Konus-Wind observation of GRB 130702A
  17. GRB 130702A: further TNG observations
  18. GRB 130702A: NOT spectroscopy and redshift of the nearby bright galaxy
  19. GRB 130702A: further Swift-XRT observations
  20. GRB 130702A: Continued P60 observations
  21. GRB 130702A: RATIR Optical and NIR Observations
  22. GRB 130702A: CARMA 3mm detection
  23. GRB 130702A: NOT optical observations
  24. GRB 130702A: TNG optical observations
  25. GRB 130702A / Fermi394416326 : Nanshan optical observations
  26. IPN localization of GRB 130702A (= Fermi 394416326)
  27. Fermi GRB 130702A: Swift XRT and UVOT observations
  28. GRB 130702A / Fermi394416326: Fermi GBM detection
  29. GRB 130702A / Fermi394416326 : Fermi-LAT detection of a burst

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