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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"

27604 results found.

  1. GRB 160912A: Swift-XRT refined Analysis
  2. GRB 160912A: Fermi GBM detection
  3. GRB 160910A: Global MASTER Net OT detection before LAT alert
  4. GRB 160912A: Swift detection of a burst
  5. GRB 160910A: CALET Gamma-Ray Burst Monitor detection
  6. GRB 160910A: NOT afterglow confirmation
  7. GRB 160908A: CALET Gamma-Ray Burst Monitor detection
  8. GRB 160910A: Fermi-LAT detection
  9. GRB 160910A: Fermi GBM observation
  10. Konus-Wind observation of GRB 160905A
  11. GRB 160821B: 15 GHz upper limits from AMI
  12. GRB 160905A: Swift/UVOT Detection
  13. GRB 160905A: Swift-BAT refined analysis
  14. Swift Trigger 711158 is not an astrophysical event
  15. GRB 160905A: Swift-XRT refined Analysis
  16. GRB 160821A: 15 GHz upper limits from AMI
  17. GRB 160905A: Fermi-LAT detection
  18. GRB 160905A: Fermi GBM observation
  19. IceCube HESE 160814: MASTER OT J130845.02-323254.9 as the possible source of the high energy neutrino
  20. GRB 160905A: Swift detection of a burst with an optical counterpart
  21. Fermi GBM trigger 494508549 / 160902479 is not a GRB
  22. GRB 160824B: Lomonosov BDRG gamma ray detection and MASTER limit
  23. GRB 160829A: Fermi GBM Detection
  24. GRB 160829A: Fermi-LAT detection of a short GRB
  25. GRB 160827A: Swift-BAT refined analysis
  26. Swift trigger 710022 is not astrophysical
  27. GRB 160827A: Swift detection of a burst
  28. Correction to Circular 19874 (on Swift trigger 71022)
  29. Swift Trigger 710022 is very likely noise
  30. GRB 160824B: CALET Gamma-Ray Burst Monitor detection
  31. GRB 160826A: Swift-BAT refined analysis
  32. GRB 160826A: Swift/UVOT Upper Limits
  33. GRB 160825A: not localized by Swift
  34. GRB 160820A: Fermi GBM observation
  35. GRB 160826A: Swift-XRT refined Analysis
  36. GRB160821A: Astrosat CZTI (veto) detection
  37. GRB 160826A: Swift detection of a burst
  38. GRB 160821A: CALET Gamma-Ray Burst Monitor detection
  39. GRB 160824A: 1.5m OSN I-band observation
  40. GRB 160824A: Swift-BAT refined analysis
  41. GRB 160824A: Swift/UVOT Possible Afterglow Detection
  42. GRB 160824A: Bassano Bresciano Observatory upper limits
  43. GRB 160824A: Swift-XRT refined Analysis
  44. GRB 160824B: Fermi GBM detection
  45. GRB 160824A: Swift detection of a burst
  46. IPN Triangulation of GRB 160822A (short/hard)
  47. Konus-Wind observation of GRB 160820A
  48. IPN Triangulation of GRB 160820A (short/hard)
  49. GRB 160822672: Fermi GBM detection
  50. GRB 160821B: Swift-BAT refined analysis
  51. GRB 160821B: Fermi GBM Detection
  52. GRB 160821B: Swift-XRT refined Analysis
  53. GRB 160821A: Swift-BAT refined analysis
  54. GRB 160821B: Swift/UVOT Upper Limits
  55. Short GRB 160821B: MASTER early optical observations
  56. GRB 160821A: Fermi-LAT refined analysis
  57. GRB 160821A: Fermi GBM Detection
  58. GRB 160821B: Swift detection of a short burst
  59. GRB 160821A: TAROT Calern observatory optical detection
  60. GRB 160821A: Fermi-LAT detection of a bright burst
  61. GRB 160821A: Swift detection of a bright burst
  62. BAT detection and localization of GRB 160819A
  63. GRB 160819A: Fermi GBM detection
  64. GRB 160816A: Further RATIR Optical and NIR Observations
  65. GRB 160816A: MASTER OT early detection on coaded images
  66. GRB 160816A: RATIR Optical and NIR Afterglow Confirmation
  67. GRB 160816A iTelescope observation
  68. Fermi GBM Observations of IceCube-160806A
  69. GRB 160816A: Swift/UVOT Detection
  70. GRB 160714A: 15 GHz upper limits from AMI
  71. GRB 160816A: RATIR Optical and NIR Observations
  72. GRB 160816A: LCOGT-FTN optical candidate
  73. GRB 160816A: MASTER inspection
  74. GRB 160816730A: Fermi GBM detection/observation
  75. GRB 160816A: Fermi-LAT detection
  76. GRB 160815A: Swift/UVOT Detection
  77. GRB 160815A: Swift-BAT refined analysis
  78. GRB 160815A: Swift-XRT refined Analysis
  79. GRB 160815A: Fermi GBM detection/observation
  80. GRB 160815A: Swift detection of a burst
  81. GRB 160804B: CALET Gamma-Ray Burst Monitor detection
  82. Fermi GBM trigger 160812507/492696620 is not a GRB
  83. INTEGRAL/SPI-ACS and IBIS_VETO search for prompt gamma-ray counterpart of IceCube-160806A
  84. Fermi GBM trigger 160810523/492525192 is not a GRB
  85. GRB 160806A: Fermi GBM observation
  86. IPN Triangulation of GRB 160806A
  87. Swift Trigger 707517 is not an astrophysical event
  88. GRB160802A - Astrosat CZTI detection
  89. Swift Trigger 707545 is likely 4U 1850-03/GS1843-02
  90. Swift Trigger 707517 is probably not a GRB
  91. GRB 160804A: RATIR Optical and NIR Observations
  92. IceCube-160731A: Konus-Wind limits
  93. GRB 160804A: GROND observations
  94. GRB 160804A: VLT/X-shooter redshift
  95. GRB 160804A: TNG optical observations, afterglow fading and candidate host galaxy
  96. GRB 160804A: Fermi GBM observation
  97. GRB160804A: MASTER-SAAO observation
  98. GRB 160804A: Swift-BAT refined analysis
  99. GRB 160804A: Swift/UVOT Detection
  100. GRB 160804A: Swift-XRT refined Analysis

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