Skip to main content
New! Circulars over Kafka, Heartbeat Topic, and Schema v4.1.0. 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').

18 results found.

  1. GRB 111215A: Keck/LRIS Imaging
  2. GRB 111215A: EVLA observations
  3. GRB111215A: optical upper limit
  4. GRB 111215A: WHT, LT and NOT imaging
  5. GRB 111215A: TNG K-band observations
  6. GRB 111215A: MITSuME Okayama Optical upper limits
  7. GRB 111215A: Swift/UVOT Upper Limits
  8. GRB 111215A: Swift-XRT refined Analysis
  9. Possible detection of pre-trigger X-ray emission from GRB 111215A by MAXI/GSC
  10. GRB 111215A: Enhanced Swift-XRT position
  11. GRB 111215A: Swift-BAT refined analysis
  12. GRB 111215A: OSN I-band observations
  13. GRB 111215A: MASTER-Net optical prompt and follow up observations
  14. GRB 111215A, Optical Observations
  15. GRB 111215A: MITSuME Akeno Optical upper limits
  16. GRB 111215A: GMG optical upper limit
  17. GRB 111215A : Xinglong TNT upper limit
  18. GRB 111215A: Swift detection of a burst

Advanced

Download all Circulars as a .tar.gz archive:
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