Skip to main content
Introducing Einstein Probe, Astro Flavored Markdown, and Notices Schema v4.0.0. See news and announcements

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').

14 results found.

  1. GRB 110625A, the review of the sky area in plate archives
  2. GRB 110625A: Suzaku WAM observation of the prompt emission
  3. GRB 110625A: Fermi GBM and LAT observations
  4. GRB 110625A: Swift/UVOT Upper Limits
  5. GRB 110625A: 1.23m CAHA I-band observations
  6. GRB 110625A: Fermi LAT detection
  7. GRB 110625A: GROND detection of a source inside the XRT error circle
  8. GRB 110625A: NIR Source
  9. GRB 110625A: Konkoly observations
  10. Konus-Wind observation of GRB 110625A
  11. GRB 110625A: Swift-XRT refined Analysis
  12. GRB 110625A: Swift-BAT refined analysis
  13. GRB 110625A: ROTSE-III Optical Limits
  14. GRB 110625A: Swift detection of a burst


Download all Circulars as a .tar.gz archive:
Looking for U.S. government information and services? Visit