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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').

13 results found.

  1. GRB240828B: REM optical/NIR upper limits
  2. GRB 240828B: AbAO optical upper limit
  3. GRB 240828B: Mephisto optical upper limit
  4. GRB 240828B: GRANDMA Optical Upper Limit
  5. GRB 240828B: J-band upper limit from WINTER
  6. GRB 240828B: GMG Optical Upper Limit
  7. GRB 240828B: GWAC-F50A optical upper limit
  8. GRB 240828B: SVOM/C-GFT optical upper limit
  9. GRB 240828B: SAO RAS optical upper limit
  10. GRB 240828B: KAIT optical upper limit
  11. GRB 240828B: Swift-XRT afterglow detection
  12. GRB 240828B: Swift ToO observations
  13. GRB 240828B : Detection of a possible very soft X-ray transient by SVOM/ECLAIRs

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