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"

11609 results found.

  1. GRB 160816730A: Fermi GBM detection/observation
  2. GRB 160816A: Swift ToO observations
  3. GRB 160816A: Fermi-LAT detection
  4. GRB 160815A: Fermi GBM detection/observation
  5. GRB 160804B: CALET Gamma-Ray Burst Monitor detection
  6. IceCube 160806A: Lomonosov BDRG gamma ray prompt observations
  7. Fermi GBM trigger 160812507/492696620 is not a GRB
  8. Fermi GBM trigger 160810523/492525192 is not a GRB
  9. GRB 160806A: Fermi GBM observation
  10. IPN Triangulation of GRB 160806A
  11. GRB160802A - Astrosat CZTI detection
  12. GRB 160804A: Fermi GBM observation
  13. Konus-Wind observation of GRB 160802A
  14. IPN Triangulation of GRB 160802A
  15. GBM Observations of IceCube 160731
  16. GRB 160802A: Fermi GBM detection
  17. GRB160720A: Astrosat CZTI detection
  18. GRB160709A: Astrosat CZTI detection of short GRB
  19. GBM observation of SGR-like burst from the direction of PSR 1119-6127
  20. Konus-Wind observation of short GRB 160726A
  21. GRB 160726A: Fermi GBM observation
  22. GRB 160721A: CALET Gamma-Ray Burst Monitor detection
  23. Konus-Wind observation of GRB 160720A
  24. IPN Triangulation of GRB 160720A
  25. GRB 160720A: Fermi GBM detection
  26. Fermi GBM trigger 490701713/160720418 is not a GRB
  27. Fermi GBM trigger 490365157/160716523 is not a GRB
  28. GRB 160623A: afterglow spectroscopy by GTC and independent redshift determination
  29. GRB 160714A: Fermi GBM observation
  30. Fermi GBM trigger 490193747/160714539 is not a GRB
  31. GRB 160709A: MASTER early imaging Swift BAT error box
  32. GRB 160709A, Swift-BAT detection and localization
  33. GRB 160709A: Swift-XRT observations
  34. GRB 160709A: Global MASTER Net Fermi GBM Alerts observations
  35. Konus-Wind observation of GRB 160709A (short/hard)
  36. GRB 160709A: Fermi GBM Observations
  37. GRB 160709A: Fermi-LAT detection
  38. GRB 160709A: Tiled Swift observations
  39. Fermi GBM trigger 489771293/160709649 is not a GRB
  40. GRB 160628A CALET Gamma-Ray Burst Monitor detection
  41. SGR 1935+2154: CALET Gamma-Ray Burst Monitor detections
  42. GRB 160623A: Astrosat CZTI detection
  43. GRB 160625B: RTT150 optical observations
  44. GRB 160625B: LCOGT FTN observations
  45. GRB 160629A: Global MASTER Net Prompt OT observations
  46. Konus-Wind observation of GRB 160629A
  47. GRB 160629A: Fermi GBM observation
  48. Pi of the Sky detection of an optical flash accompanying GRB 160625B
  49. Konus-Wind observation of a bright burst from SGR 1935+2154
  50. GRB 160625B: Global MASTER-Net prompt optical emission detection
  51. GRB 160625B: 15 GHz detection from AMI
  52. GRB 160623A: Possible detection of a radio afterglow at 15 GHz with AMI
  53. SGR 1935+2154: AMI 15 GHz upper limits of the magnetar during outburst
  54. GRB 160625B: VLA Detection
  55. GRB 160625B: TSHAO optical observations
  56. Konus-Wind observation of GRB 160625B
  57. GRB 160625B: Mini-MegaTORTORA detection of bright optical flash simultaneous with LAT event
  58. GRB 160625B: RATIR Optical and NIR Observations
  59. GRB 160625B: VLT/X-shooter redshift
  60. Fermi/GBM observation of a bright burst from magnetar SGR 1935+2154
  61. GRB 160625B: RATIR Optical and NIR Afterglow Detection
  62. GRB 160625B: Fermi GBM refined analysis
  63. GRB 160625B: Fermi-LAT refined analysis
  64. GRB 160625B: Swift-XRT afterglow detection
  65. GRB 160623A: SMA submm afterglow observations
  66. GRB 160625B: Tiled Swift observations
  67. GRB 160625B: Fermi GBM initial observations
  68. GRB 160625B: Fermi-LAT detection of a bright burst
  69. GRB 160625A - two different events?
  70. GRB 160624A: Fermi GBM observation
  71. GRB 160521B: 15 GHz upper limits from AMI
  72. GRB 160623A: Mondy optical observations
  73. Swift detection of a dust-scattered halo around GRB 160623A
  74. GRB 160623A: Swift-XRT afterglow detection
  75. GRB 160623A: Fermi GBM detection/observation
  76. Konus-Wind observation of GRB 160623A
  77. GRB 160623A / Galactic transient: Fermi-LAT detection
  78. GRB 160623A: Swift ToO observations
  79. Fermi GBM Trigger 160622573 is not a GRB
  80. More FERMI GBM bursts from the magnetar SGR 1935+2154
  81. Fermi GBM trigger 488128598/160620637 is not a GRB
  82. Fermi GBM trigger 487974449/160618852 is not a GRB
  83. Konus-Wind observation of GRB 160612A
  84. IPN Triangulation of GRB 160612A (short/hard)
  85. GRB 160509A: 15 GHz upper limits from AMI
  86. GRB 160612A: Fermi GBM detection
  87. Fermi GBM trigger 486907024/160606498 is not a GRB
  88. Fermi GBM trigger 486562774/160602514 is not a GRB
  89. GRB 160530B CALET Gamma-Ray Burst Monitor detection
  90. GRB 160530B: Fermi GBM Detection
  91. GRB 160521B: Swift-XRT afterglow detection
  92. Konus-Wind observation of GRB 160521B
  93. Correction - Fermi/GBM trigger 160523919 is a GRB
  94. GRB 160521B: Theoretical estimate of the redshift and urgent need for further x-ray observations
  95. The nature of the Fermi/GBM trigger 160523919 is unknown.
  96. GRB 160521B: Swift-XRT observations
  97. GRB 160521B: Swift ToO observations
  98. GRB 160521B: Fermi-LAT detection
  99. GRB 160521B: Fermi GBM detection
  100. GRB 160519A: Fermi GBM detection

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