Skip to main content
New Swift-BAT/GUANO and IceCube Notice Types Available! 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 131128A: Bassano Bresciano Observatory optical upper limit
  2. GRB 131128A; Fermi GBM observation
  3. GRB 131128A: GROND observations of the afterglow
  4. GRB 131128A: Swift/UVOT Detection
  5. GRB 131128A: AROMA-N Optical Observation
  6. GRB 131128A: Swift-XRT refined Analysis
  7. GRB 131128A: Kanata/HOWPol optical observation
  8. GRB 131128A: T100 observations
  9. GRB 131128A: Swift-BAT refined analysis
  10. GRB 131128A: Enhanced Swift-XRT position
  11. GRB 131128A: Nanshan afterglow confirmation
  12. GRB 131128A: MASTER-Net optical observations
  13. GRB 131128A: Nanshan afterglow candidate
  14. GRB 131128A: Swift detection of a burst

Advanced

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