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"

11622 results found.

  1. GRB 160819A: Fermi GBM detection
  2. GRB 160816A: Further RATIR Optical and NIR Observations
  3. GRB 160816A: MASTER OT early detection on coaded images
  4. GRB 160816A: RATIR Optical and NIR Afterglow Confirmation
  5. GRB 160816A iTelescope observation
  6. Fermi GBM Observations of IceCube-160806A
  7. GRB 160816A: Swift/UVOT Detection
  8. GRB 160816A: IPN annulus
  9. Konus-Wind observation of GRB 160816A
  10. GRB 160816A: RATIR Optical and NIR Observations
  11. GRB 160816A: LCOGT-FTN optical candidate
  12. GRB 160816A: Swift-XRT afterglow detection
  13. GRB 160816A: MASTER inspection
  14. GRB 160816730A: Fermi GBM detection/observation
  15. GRB 160816A: Swift ToO observations
  16. GRB 160816A: Fermi-LAT detection
  17. GRB 160815A: Fermi GBM detection/observation
  18. GRB 160804B: CALET Gamma-Ray Burst Monitor detection
  19. IceCube 160806A: Lomonosov BDRG gamma ray prompt observations
  20. Fermi GBM trigger 160812507/492696620 is not a GRB
  21. Fermi GBM trigger 160810523/492525192 is not a GRB
  22. GRB 160806A: Fermi GBM observation
  23. IPN Triangulation of GRB 160806A
  24. GRB160802A - Astrosat CZTI detection
  25. GRB 160804A: Fermi GBM observation
  26. Konus-Wind observation of GRB 160802A
  27. IPN Triangulation of GRB 160802A
  28. GBM Observations of IceCube 160731
  29. GRB 160802A: Fermi GBM detection
  30. GRB160720A: Astrosat CZTI detection
  31. GRB160709A: Astrosat CZTI detection of short GRB
  32. GBM observation of SGR-like burst from the direction of PSR 1119-6127
  33. Konus-Wind observation of short GRB 160726A
  34. GRB 160726A: Fermi GBM observation
  35. GRB 160721A: CALET Gamma-Ray Burst Monitor detection
  36. Konus-Wind observation of GRB 160720A
  37. IPN Triangulation of GRB 160720A
  38. GRB 160720A: Fermi GBM detection
  39. Fermi GBM trigger 490701713/160720418 is not a GRB
  40. Fermi GBM trigger 490365157/160716523 is not a GRB
  41. GRB 160623A: afterglow spectroscopy by GTC and independent redshift determination
  42. GRB 160714A: Fermi GBM observation
  43. Fermi GBM trigger 490193747/160714539 is not a GRB
  44. GRB 160709A: MASTER early imaging Swift BAT error box
  45. GRB 160709A, Swift-BAT detection and localization
  46. GRB 160709A: Swift-XRT observations
  47. GRB 160709A: Global MASTER Net Fermi GBM Alerts observations
  48. Konus-Wind observation of GRB 160709A (short/hard)
  49. GRB 160709A: Fermi GBM Observations
  50. GRB 160709A: Fermi-LAT detection
  51. GRB 160709A: Tiled Swift observations
  52. Fermi GBM trigger 489771293/160709649 is not a GRB
  53. GRB 160628A CALET Gamma-Ray Burst Monitor detection
  54. SGR 1935+2154: CALET Gamma-Ray Burst Monitor detections
  55. GRB 160623A: Astrosat CZTI detection
  56. GRB 160625B: RTT150 optical observations
  57. GRB 160625B: LCOGT FTN observations
  58. GRB 160629A: Global MASTER Net Prompt OT observations
  59. Konus-Wind observation of GRB 160629A
  60. GRB 160629A: Fermi GBM observation
  61. Pi of the Sky detection of an optical flash accompanying GRB 160625B
  62. Konus-Wind observation of a bright burst from SGR 1935+2154
  63. GRB 160625B: Global MASTER-Net prompt optical emission detection
  64. GRB 160625B: 15 GHz detection from AMI
  65. GRB 160623A: Possible detection of a radio afterglow at 15 GHz with AMI
  66. SGR 1935+2154: AMI 15 GHz upper limits of the magnetar during outburst
  67. GRB 160625B: VLA Detection
  68. GRB 160625B: TSHAO optical observations
  69. Konus-Wind observation of GRB 160625B
  70. GRB 160625B: Mini-MegaTORTORA detection of bright optical flash simultaneous with LAT event
  71. GRB 160625B: RATIR Optical and NIR Observations
  72. GRB 160625B: VLT/X-shooter redshift
  73. Fermi/GBM observation of a bright burst from magnetar SGR 1935+2154
  74. GRB 160625B: RATIR Optical and NIR Afterglow Detection
  75. GRB 160625B: Fermi GBM refined analysis
  76. GRB 160625B: Fermi-LAT refined analysis
  77. GRB 160625B: Swift-XRT afterglow detection
  78. GRB 160623A: SMA submm afterglow observations
  79. GRB 160625B: Tiled Swift observations
  80. GRB 160625B: Fermi GBM initial observations
  81. GRB 160625B: Fermi-LAT detection of a bright burst
  82. GRB 160625A - two different events?
  83. GRB 160624A: Fermi GBM observation
  84. GRB 160521B: 15 GHz upper limits from AMI
  85. GRB 160623A: Mondy optical observations
  86. Swift detection of a dust-scattered halo around GRB 160623A
  87. GRB 160623A: Swift-XRT afterglow detection
  88. GRB 160623A: Fermi GBM detection/observation
  89. Konus-Wind observation of GRB 160623A
  90. GRB 160623A / Galactic transient: Fermi-LAT detection
  91. GRB 160623A: Swift ToO observations
  92. Fermi GBM Trigger 160622573 is not a GRB
  93. More FERMI GBM bursts from the magnetar SGR 1935+2154
  94. Fermi GBM trigger 488128598/160620637 is not a GRB
  95. Fermi GBM trigger 487974449/160618852 is not a GRB
  96. Konus-Wind observation of GRB 160612A
  97. IPN Triangulation of GRB 160612A (short/hard)
  98. GRB 160509A: 15 GHz upper limits from AMI
  99. GRB 160612A: Fermi GBM detection
  100. Fermi GBM trigger 486907024/160606498 is not a GRB

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