Skip to main content
JSON Notices via Email, Kafka Cron Jobs, Submitter Profile, GCN is Hiring. See news and announcements

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"

12 results found.

  1. GRB 150212A, the review of the sky area in plate archives
  2. GRB 150212A: Swift/UVOT Observations
  3. GRB 150212A: Swift-XRT refined Analysis
  4. GRB 150212A: RATIR Optical and NIR Observations
  5. GRB 150212A: Khureltogot optical upper limit
  6. GRB 150212A: Skynet DSO14/GORT observations
  7. GRB 150212A: Swift-BAT refined analysis
  8. GRB 150212A: MASTER optical observations
  9. GRB 150212A: No Swift/UVOT detection in initial observation
  10. GRB 150212A: P60 Afterglow Retraction
  11. GRB 150212A: Swift-XRT afterglow detection
  12. GRB 150212A: Swift detection of a burst

Advanced

Download all Circulars as a .tar.gz archive (updated once a day):
Questions or comments?
Contact GCN directly.
Have you found a bug in GCN?
Open an issue.
Want to contribute code to GCN?
Get involved on GitHub.

gcn.nasa.gov

A service of the Astrophysics Science Division at NASA Goddard Space Flight Center

Looking for U.S. government information and services? Visit USA.gov