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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"

43862 results found.

  1. GRB 160712A: Swift-XRT refined Analysis
  2. GRB 160712A: Skynet R-COP observations
  3. GRB 160712A: Enhanced Swift-XRT position
  4. GRB 160629A: 15 GHz detections and upper limits from AMI
  5. GRB 160624A: 15 GHz upper limits from AMI
  6. GRB 160712A: Initial Swift/UVOT observations
  7. GRB 160712A: Swift-XRT observations
  8. GRB 160712A: Global MASTER-Net optical observation
  9. GRB 160712A: Swift detection of a burst
  10. GRB 160625B: Global MASTER-Crimea prompt optical emission detection (fwd)
  11. GRB 160709A: MASTER early imaging Swift BAT error box
  12. GRB 160709A, Swift-BAT detection and localization
  13. GRB 160625B: TSHAO optical observations
  14. GRB 160709A: Swift-XRT observations
  15. GRB 160709A: Global MASTER Net Fermi GBM Alerts observations
  16. Konus-Wind observation of GRB 160709A (short/hard)
  17. GRB 160709A: Fermi GBM Observations
  18. GRB 160709A: Fermi-LAT detection
  19. GRB 160709A: Tiled Swift observations
  20. Fermi GBM trigger 489771293/160709649 is not a GRB
  21. GRB 160705B: TAROT Calern observatory optical observations
  22. GRB 160628A CALET Gamma-Ray Burst Monitor detection
  23. GRB 160629A: Mondy optical observations
  24. GRB 160629A: AbAO optical observations
  25. GRB 160703A: Keck-I/LRIS Optical Observations
  26. Konus-Wind observation of GRB 160702A (short/hard)
  27. IPN Triangulation of GRB 160702A (short/hard)
  28. SGR 1935+2154: CALET Gamma-Ray Burst Monitor detections
  29. GRB 160705B: RATIR Optical and NIR Observations and Confirmation of the Fading Afterglow
  30. GRB 160705B: Swift-BAT refined analysis
  31. GRB 160623A: Astrosat CZTI detection
  32. GRB 160705B: Swift-XRT refined Analysis
  33. GRB 160705B: Enhanced Swift-XRT position
  34. GRB 160705B: LT optical candidate
  35. GRB 160705B: Swift detection of a burst
  36. GRB 160703A: Swift/UVOT Detection
  37. GRB 160703A: Swift-XRT afterglow detection
  38. GRB 160705A/MAXI J0748-149: MAXI/GSC detection
  39. GRB 160703A: MITSuME Akeno Optical Observations
  40. GRB 160625B: RTT150 optical observations
  41. GRB 160703A: Bassano Bresciano Observatory upper limits
  42. Konus-Wind observation of GRB 160703A
  43. GRB 160703A: Swift-BAT refined analysis
  44. GRB 160703A: Zadko observatory - Gingin optical observations
  45. GRB 160629A: AbAO optical observations
  46. GRB 160703A: Swift detection of a burst
  47. GRB 160625B: SAO RAS monitoring
  48. GRB 160629A: Swift-XRT afterglow detection
  49. GRB 160625B: LCOGT FTN observations
  50. GRB 160630A: Swift-BAT refined analysis
  51. GRB 160629A: Global MASTER Net Prompt OT observations
  52. GRB 160629A: Swift ToO observations
  53. GRB 160630A: Skynet PROMPT-CTIO observations of the optical afterglow
  54. Konus-Wind observation of GRB 160629A
  55. GRB 160630A: Zadko observatory - Gingin optical observations
  56. GRB 160630A: TAROT La Silla observatory optical observations
  57. GRB 160629A: BTA and GTC redshift
  58. GRB 160630A: Swift/UVOT Upper Limits
  59. GRB 160630A: Swift-XRT refined Analysis
  60. GRB 160625A: GROND upper limits
  61. GRB 160629A: Fermi GBM observation
  62. GRB 160630A: REM NIR observations
  63. GRB 160630A: Enhanced Swift-XRT position
  64. GRB 160630A: GROND Afterglow Detection
  65. GRB 160630A: Swift detection of a burst
  66. GRB 160629A: SAO RAS independent OT detection
  67. GRB 160629A: TAROT Calern observatory optical detection
  68. GRB 160629A: a long GBB detected by INTEGRAL
  69. GRB 160625B: TSHAO optical observations, correction GCN 19619
  70. GRB 160625B: TSHAO optical observations
  71. Konus-Wind observation of GRB 160620A
  72. GRB 160625B CALET Gamma-Ray Burst Monitor detection
  73. GRB 160625B: SMARTS optical/IR afterglow observations
  74. Pi of the Sky detection of an optical flash accompanying GRB 160625B
  75. GRB 160623A: SAO RAS optical observations
  76. Konus-Wind observation of a bright burst from SGR 1935+2154
  77. GRB 160625B: Global MASTER-Net prompt optical emission detection
  78. GRB 160625B: SAO RAS optical observations
  79. GRB 160625B: 15 GHz detection from AMI
  80. GRB 160623A: Possible detection of a radio afterglow at 15 GHz with AMI
  81. GRB 160601A: 15 GHz upper limits from AMI
  82. SGR 1935+2154: AMI 15 GHz upper limits of the magnetar during outburst
  83. GRB 160625B: VLA Detection
  84. GRB 160625B: TSHAO optical observations
  85. Konus-Wind observation of GRB 160625B
  86. GRB 160625B: Mini-MegaTORTORA detection of bright optical flash simultaneous with LAT event
  87. GRB 160625B: RATIR Optical and NIR Observations
  88. GRB 160625B: TNG redshift confirmation
  89. GRB 160625B: VLT/X-shooter redshift
  90. Fermi/GBM observation of a bright burst from magnetar SGR 1935+2154
  91. GRB 160623A CALET Gamma-Ray Burst Monitor detection
  92. Swift-BAT refined analysis on the bright event from SGR 1935+2154
  93. Swift Trigger 701668 is probably not an astrophysical event
  94. IPN Triangulation of GRB 160620A (short/hard)
  95. GRB 160625A: Swift/UVOT Upper Limits
  96. GRB 160625A: Swift-BAT refined analysis
  97. GRB 160625A: Swift-XRT refined Analysis
  98. Trigger 701590: Swift detection of a bright outburst from SGR 1935+2154
  99. GRB 160625B: Swift/UVOT Detection
  100. GRB 160625B: RATIR Optical and NIR Afterglow Detection

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