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GCN Circulars

GCN Circulars are rapid bulletins submitted by and distributed to the community. 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.

Advanced Search Examples (click to copy):

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

11 results found.

  1. LIGO/Virgo S200311bg: Upper limits from Konus-Wind observations
  2. LIGO/Virgo S200311bg: Updated Sky Localization and EM Bright Classification
  3. LIGO/Virgo S200311bg: Not observable by CALET
  4. LIGO/Virgo S200311bg: Swift/BAT in the South Atlantic Anomaly
  5. LIGO/Virgo S200311bg: No significant counterpart candidates in Fermi-LAT observations
  6. LIGO/Virgo S200311bg: not observable by Fermi GBM
  7. LIGO/Virgo S200311bg: Coverage and upper limits from MAXI/GSC observations
  8. LIGO/Virgo S200311bg: not observable by AGILE at the event time
  9. LIGO/Virgo S200311bg: No counterpart candidates in INTEGRAL SPI-ACS,prompt observation
  10. LIGO/Virgo S200311bg: Upper limits from IceCube neutrino searches
  11. LIGO/Virgo S200311bg: Identification of a GW compact binary merger candidate

Advanced

Download all Circulars as a .tar.gz archive (updated once a day):
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