Skip to main content
JSON Notices via Email, Kafka Cron Jobs, Submitter Profile, GCN is Hiring. See news and announcements

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"

11563 results found.

  1. Fermi GRB 240616A: Global MASTER-Net observations report
  2. Konus-Wind detection of GRB 240615A (short/hard)
  3. GRB 240615A: GOTO optical upper limits
  4. Fermi trigger No 740166710: Global MASTER-Net observations report
  5. GRB 240616A: Fermi GBM Final Real-time Localization
  6. GRB 240615A: Swift/BAT-GUANO arcminute localization of a short burst
  7. GRB 240615A: Fermi GBM Final Real-time Localization
  8. GRB 240603A: VZLUSAT-2 detection
  9. GRB 240612A: GRBAlpha detection
  10. GRB 240613A: Fermi GBM Final Real-time Localization
  11. Fermi GRB 240612B: Global MASTER-Net observations report
  12. Fermi GRB 240612A: Global MASTER-Net observations report
  13. GRB 240612B: Fermi GBM Final Real-time Localization
  14. GRB 240612A: Fermi GBM Final Real-time Localization
  15. GRB 240607A: GECAM detection of a bright long burst
  16. Fermi GRB 240611A: Global MASTER-Net observations report
  17. Konus-Wind detection of GRB 240607A
  18. GRB 240611A: Fermi GBM Final Real-time Localization
  19. Fermi GRB 240610A: Global MASTER-Net observations report
  20. GRB 240610A: Fermi GBM Final Real-time Localization
  21. IPN triangulation of GRB 240607A
  22. Fermi Gamma-ray Burst Monitor trigger 739632045/240609556 is not a GRB
  23. Fermi trigger No 739632045: Global MASTER-Net observations report
  24. Fermi GRB 240608A: Global MASTER-Net observations report
  25. Konus-Wind detection of GRB 240606B
  26. Fermi trigger No 739506569: Global MASTER-Net observations report
  27. GRB 240608A: Fermi GBM Final Real-time Localization
  28. Fermi GRB 240607A: Global MASTER-Net observations report
  29. GRB 240607A: Fermi GBM Observation
  30. GRB 240606B: Fermi GBM Observation
  31. GRB 240607A: AstroSat CZTI detection of bright long burst
  32. GRB 240607A: Fermi GBM detection of a very bright burst
  33. GRB 240607A: BALROG localization (Fermi Trigger 739450879 / GRB 240607459)
  34. GRB 240607A: Fermi GBM Final Real-time Localization
  35. Fermi trigger No 739373591: Global MASTER-Net observations report
  36. Konus-Wind detection of GRB 240603A
  37. Fermi GRB 240604A: Global MASTER-Net observations report
  38. Fermi GRB 240605A: Global MASTER-Net observations report
  39. Fermi GRB 240605C: Global MASTER-Net observations report
  40. Fermi Gamma-ray Burst Monitor trigger 739290883/240605607 is not a GRB
  41. GRB 240605C: Fermi GBM Final Real-time Localization
  42. IPN triangulation of GRB 240603A
  43. GRB 240605B: Fermi GBM Final Real-time Localization
  44. GRB 240604A: Fermi GBM Final Localization
  45. GRB 240605A: Fermi GBM Final Real-time Localization
  46. Fermi GRB 240603C: Global MASTER-Net observations report
  47. GRB 240603A: Fermi GBM Final Localization
  48. GRB 240603C: BALROG localization (Fermi Trigger 739102156 / GRB 240603423)
  49. GRB 240603C: Fermi GBM Final Real-time Localization
  50. Fermi GRB 240602A: Global MASTER-Net observations report
  51. GRB 240602A: Fermi GBM Final Real-time Localization
  52. GRB 240527B: Swift-XRT afterglow detection
  53. GRB 240527B: Fermi GBM Observation
  54. Fermi GRB 240527A: Global MASTER-Net observations report
  55. GRB 240527B: Fermi-LAT detection
  56. Fermi GRB 240527B: Global MASTER-Net observations report
  57. GRB 240527B: Fermi GBM Final Localization
  58. GRB 240527B: BALROG localization (Fermi Trigger 738511436 / GRB 240527586)
  59. GRB 240527A: Fermi GBM Final Real-time Localization
  60. Fermi trigger No 738348224: Global MASTER-Net observations report
  61. Fermi trigger No 738330463: Global MASTER-Net observations report
  62. GRB 240521B: Fermi GBM Observation
  63. Fermi GBM Sub-Threshold Detection of GRB 240516B
  64. GRB 240513A: Swift-XRT afterglow detection
  65. GRB 240521B: Swift/BAT-GUANO arcminute localization of a long burst
  66. Fermi trigger No 737996942: Global MASTER-Net observations report
  67. GRB 240516B: AstroSat CZTI detection
  68. GRB 240514B: VZLUSAT-2 detection
  69. GRB 240504A: VZLUSAT-2 detection
  70. GRB 240502A: VZLUSAT-2 detection
  71. GRB 240519A: GRBAlpha detection
  72. GRB 240519A: AstroSat CZTI detection
  73. Fermi trigger No 737788024: Global MASTER-Net observations report
  74. GRB 240519A: BALROG localization (Fermi Trigger 737788024 / GRB 240519213)
  75. Fermi GRB 240517A: Global MASTER-Net observations report
  76. GRB 240516A ATCA radio observations
  77. IPN triangulation of GRB 240514B (short)
  78. GRB 240513A: Swift ToO observations
  79. GRB 240517A: Fermi GBM Final Real-time Localization
  80. Konus-Wind detection of GRB 240513A
  81. GRB 240516A: AstroSat CZTI detection
  82. Fermi trigger No 737559855: Global MASTER-Net observations report
  83. GRB 240516A: Fermi GBM Observation
  84. GRB 240502C: Zeiss-1000 at Koshka observations of GOTO24bao optical counterpart candidate
  85. GRB 240516A: GOTO optical upper limit
  86. Fermi trigger No 737523389: Global MASTER-Net observations report
  87. GRB 240514B: AT2024ixa/GOTO24bph is not consistent with the Fermi localisation
  88. Fermi trigger No 737476171: Global MASTER-Net observations report
  89. GRB 240514B: GOTO candidate optical counterpart
  90. Fermi Gamma-ray Burst Monitor list of triggers that are not a GRB
  91. GRB 240514B: GRBAlpha detection
  92. GRB 240514B: Fermi GBM Detection
  93. GRB 240513A: Fermi GBM observation
  94. GRB 240513A: Swift-XRT observations
  95. GRB 240514C: Fermi GBM Final Real-time Localization
  96. Fermi GRB 240514B: Global MASTER-Net observations report
  97. Fermi Gamma-ray Burst Monitor triggers 737345659/240514093 and GRB240514A are not GRBs
  98. GRB 240514B: Fermi GBM Final Real-time Localization
  99. GRB 240514A: Fermi GBM Final Real-time Localization
  100. GRB 240513A: Tiled Swift observations

Advanced

Download all Circulars as a .tar.gz archive (updated once a day):
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