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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"

29 results found.

  1. GRB 260924A: CrAO ZTSh optical observations
  2. GRB 260924A: VLA detection
  3. GRB 260924A: Swift/UVOT UV grism spectrum results
  4. GRB 260924A: AbAO optical observations
  5. GRB 260924A: Upper limits from a neutrino search with IceCube
  6. GRB 260924A: Near-infrared detection with MDM/MIRAGE
  7. GRB 260924A: COLIBRÍ optical observations
  8. GRB 260924A: Second-epoch J-band upper limit from the SYSU 80 cm infrared telescope
  9. Konus-Wind detection of GRB 260924A
  10. GRB 260924A: Extreme Isotropic-equivalent Gamma-ray Energy and encouragement for multiwavelength follow-up observations
  11. GRB 260924A: Optical follow-up observations with Kinder
  12. GRB 260924A: Ondrejov D50 optical afterglow detection
  13. GRB 260924A: SVOM/GRM observation
  14. GRB 260924A: 2.2m CAHA spectroscopic redshift z = 3.51
  15. GRB 260924A: J-band observations by the SYSU 80 cm infrared telescope
  16. GRB 260924A: Swift/UVOT Detection
  17. GRB 260924A: GROWTH-India Telescope optical observations
  18. GRB 260924A: Swift-BAT refined analysis
  19. GRB 260924A: NuSTAR detection of prompt emission
  20. GRB 260924A: Swift/UVOT Upper Limits
  21. GRB 260924A: Swift-XRT refined Analysis
  22. GRB 260924A: Fermi GRB Observation
  23. GRB 260924A: Fermi-LAT detection of a bright burst
  24. GRB 260924A: AstroSat CZTI detection
  25. GRB 260924A: NOT optical counterpart confirmation
  26. GRB 260924A: detection of a bright optical afterglow by the 1.5m OSN telescope
  27. GRB 260924A: Enhanced Swift-XRT position
  28. GRB 260924A: Swift detection of a burst
  29. GRB 260924A: Fermi GBM Final Real-time Localization

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