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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').
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"

38 results found.

  1. GRB231115A: TURBO Pre-Burst Optical Upper Limits
  2. GRB 231115A: XMM-Newton observation
  3. GRB 231115A: Upper limit from CALET Gamma-Ray Burst Monitor
  4. GRB 231115A: Wendelstein Optical/Infrared Observations
  5. GRB 231115A: JinShan optical upper limits
  6. GRB 231115A : OHP/T120 optical upper limit
  7. GRB 231115A: optical observations from INAF observatories
  8. GRB 231115A: Non-detection of radio emission with CHIME/FRB
  9. MAGIC observation of GRB 231115A, a possible magnetar giant flare
  10. GRB231115A: Liverpool Telescope imaging
  11. GRB 231115A: NuSTAR Follow-Up Observations
  12. GRB 231115A: Swift/BAT-GUANO detection of a short burst
  13. GRB 231115A: Swift-XRT and Swift-UVOT observations
  14. Konus-Wind detection of GRB 231115A (a probable Magnetar Giant Flare from M82)
  15. GRB 231115A: AGILE/MCAL upper limits
  16. GRB 231115A: Insight-HXMT/HE detection
  17. GRB 231115A: GBM/Fermi Observations of a probable Giant Flare of Magnetar
  18. GRB 231115A : MITSuME Akeno and Okayama optical upper limits
  19. GRB 231115A: Gaoyazi/GOT follow-up and archival observations
  20. GRB 231115A / AT2023xvj: Updated GIT analysis
  21. GRB 231115A: archival Chandra X-ray observations
  22. GRB 231115A: Upper limits from a neutrino search with IceCube
  23. GRB 231115A: Kinder observations with Lulin observatory
  24. GRB231115A: GRANDMA Observations
  25. GRB 231115A: GOTO pre-burst limits of AT2023xvj
  26. GRB 231115A: Non-detection in low-latency of gravitational waves with LIGO/Virgo/KAGRA
  27. GRB 231115A: pre-burst ZTF upper limits for GRB optical counterpart candidate
  28. GRB 231115A: MASTER optical observations
  29. GRB 231115A (short): Glowbug gamma-ray detection
  30. GRB 231115A: Fermi Observations of a probable Magnetar Giant Flare from M82
  31. GRB 231115A: archival HST observations
  32. GRB 231115A: GROWTH-India discovery of a potential optical counterpart
  33. GRB 231115A: Swift ToO observations
  34. Fermi GRB 231115A: Global MASTER-Net observations report
  35. GRB 231115A: significance of INTEGRAL localization alignment with M82
  36. GRB 231115A: a short hard GRB detected by IBAS, poistionally coincident with M82
  37. GRB 231115A position consistent with M 82 galaxy
  38. GRB 231115A: Fermi GBM Final Real-time Localization

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