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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"

11630 results found.

  1. GRB 160821B: GTC follow-up observation
  2. GRB 160822672: Fermi GBM detection
  3. GRB 160821B: Fermi GBM Detection
  4. Konus-Wind observation of GRB 160821A
  5. GRB 160821A: Fermi-LAT refined analysis
  6. GRB 160821A: Fermi GBM Detection
  7. GRB 160821A: Fermi-LAT detection of a bright burst
  8. BAT detection and localization of GRB 160819A
  9. GRB 160819A: Fermi GBM detection
  10. GRB 160816A: Further RATIR Optical and NIR Observations
  11. GRB 160816A: MASTER OT early detection on coaded images
  12. GRB 160816A: RATIR Optical and NIR Afterglow Confirmation
  13. GRB 160816A iTelescope observation
  14. Fermi GBM Observations of IceCube-160806A
  15. GRB 160816A: Swift/UVOT Detection
  16. GRB 160816A: IPN annulus
  17. Konus-Wind observation of GRB 160816A
  18. GRB 160816A: RATIR Optical and NIR Observations
  19. GRB 160816A: LCOGT-FTN optical candidate
  20. GRB 160816A: Swift-XRT afterglow detection
  21. GRB 160816A: MASTER inspection
  22. GRB 160816730A: Fermi GBM detection/observation
  23. GRB 160816A: Swift ToO observations
  24. GRB 160816A: Fermi-LAT detection
  25. GRB 160815A: Fermi GBM detection/observation
  26. GRB 160804B: CALET Gamma-Ray Burst Monitor detection
  27. IceCube 160806A: Lomonosov BDRG gamma ray prompt observations
  28. Fermi GBM trigger 160812507/492696620 is not a GRB
  29. Fermi GBM trigger 160810523/492525192 is not a GRB
  30. GRB 160806A: Fermi GBM observation
  31. IPN Triangulation of GRB 160806A
  32. GRB160802A - Astrosat CZTI detection
  33. GRB 160804A: Fermi GBM observation
  34. Konus-Wind observation of GRB 160802A
  35. IPN Triangulation of GRB 160802A
  36. GBM Observations of IceCube 160731
  37. GRB 160802A: Fermi GBM detection
  38. GRB160720A: Astrosat CZTI detection
  39. GRB160709A: Astrosat CZTI detection of short GRB
  40. GBM observation of SGR-like burst from the direction of PSR 1119-6127
  41. Konus-Wind observation of short GRB 160726A
  42. GRB 160726A: Fermi GBM observation
  43. GRB 160721A: CALET Gamma-Ray Burst Monitor detection
  44. Konus-Wind observation of GRB 160720A
  45. IPN Triangulation of GRB 160720A
  46. GRB 160720A: Fermi GBM detection
  47. Fermi GBM trigger 490701713/160720418 is not a GRB
  48. Fermi GBM trigger 490365157/160716523 is not a GRB
  49. GRB 160623A: afterglow spectroscopy by GTC and independent redshift determination
  50. GRB 160714A: Fermi GBM observation
  51. Fermi GBM trigger 490193747/160714539 is not a GRB
  52. GRB 160709A: MASTER early imaging Swift BAT error box
  53. GRB 160709A, Swift-BAT detection and localization
  54. GRB 160709A: Swift-XRT observations
  55. GRB 160709A: Global MASTER Net Fermi GBM Alerts observations
  56. Konus-Wind observation of GRB 160709A (short/hard)
  57. GRB 160709A: Fermi GBM Observations
  58. GRB 160709A: Fermi-LAT detection
  59. GRB 160709A: Tiled Swift observations
  60. Fermi GBM trigger 489771293/160709649 is not a GRB
  61. GRB 160628A CALET Gamma-Ray Burst Monitor detection
  62. SGR 1935+2154: CALET Gamma-Ray Burst Monitor detections
  63. GRB 160623A: Astrosat CZTI detection
  64. GRB 160625B: RTT150 optical observations
  65. GRB 160625B: LCOGT FTN observations
  66. GRB 160629A: Global MASTER Net Prompt OT observations
  67. Konus-Wind observation of GRB 160629A
  68. GRB 160629A: Fermi GBM observation
  69. Pi of the Sky detection of an optical flash accompanying GRB 160625B
  70. Konus-Wind observation of a bright burst from SGR 1935+2154
  71. GRB 160625B: Global MASTER-Net prompt optical emission detection
  72. GRB 160625B: 15 GHz detection from AMI
  73. GRB 160623A: Possible detection of a radio afterglow at 15 GHz with AMI
  74. SGR 1935+2154: AMI 15 GHz upper limits of the magnetar during outburst
  75. GRB 160625B: VLA Detection
  76. GRB 160625B: TSHAO optical observations
  77. Konus-Wind observation of GRB 160625B
  78. GRB 160625B: Mini-MegaTORTORA detection of bright optical flash simultaneous with LAT event
  79. GRB 160625B: RATIR Optical and NIR Observations
  80. GRB 160625B: VLT/X-shooter redshift
  81. Fermi/GBM observation of a bright burst from magnetar SGR 1935+2154
  82. GRB 160625B: RATIR Optical and NIR Afterglow Detection
  83. GRB 160625B: Fermi GBM refined analysis
  84. GRB 160625B: Fermi-LAT refined analysis
  85. GRB 160625B: Swift-XRT afterglow detection
  86. GRB 160623A: SMA submm afterglow observations
  87. GRB 160625B: Tiled Swift observations
  88. GRB 160625B: Fermi GBM initial observations
  89. GRB 160625B: Fermi-LAT detection of a bright burst
  90. GRB 160625A - two different events?
  91. GRB 160624A: Fermi GBM observation
  92. GRB 160521B: 15 GHz upper limits from AMI
  93. GRB 160623A: Mondy optical observations
  94. Swift detection of a dust-scattered halo around GRB 160623A
  95. GRB 160623A: Swift-XRT afterglow detection
  96. GRB 160623A: Fermi GBM detection/observation
  97. Konus-Wind observation of GRB 160623A
  98. GRB 160623A / Galactic transient: Fermi-LAT detection
  99. GRB 160623A: Swift ToO observations
  100. Fermi GBM Trigger 160622573 is not a GRB

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