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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"

27226 results found.

  1. GRB 160910A: Global MASTER Net OT detection before LAT alert
  2. Konus-Wind observation of GRB 160910A
  3. GRB 160912A: Swift detection of a burst
  4. GRB 160910A: CALET Gamma-Ray Burst Monitor detection
  5. GRB 160910A: NOT afterglow confirmation
  6. GRB 160908A: CALET Gamma-Ray Burst Monitor detection
  7. GRB 160910A: Fermi-LAT detection
  8. GRB 160910A: Fermi GBM observation
  9. Konus-Wind observation of GRB 160905A
  10. GRB 160821B: 15 GHz upper limits from AMI
  11. GRB 160905A: Swift/UVOT Detection
  12. GRB 160905A: Swift-BAT refined analysis
  13. Swift Trigger 711158 is not an astrophysical event
  14. GRB 160905A: Swift-XRT refined Analysis
  15. GRB 160905A: Fermi-LAT detection
  16. GRB 160905A: Fermi GBM observation
  17. IceCube HESE 160814: MASTER OT J130845.02-323254.9 as the possible source of the high energy neutrino
  18. GRB 160905A: Swift detection of a burst with an optical counterpart
  19. Fermi GBM trigger 494508549 / 160902479 is not a GRB
  20. GRB 160824B: Lomonosov BDRG gamma ray detection and MASTER limit
  21. GRB 160829A: Fermi GBM Detection
  22. GRB 160829A: Fermi-LAT detection of a short GRB
  23. GRB 160827A: Swift-BAT refined analysis
  24. Swift trigger 710022 is not astrophysical
  25. GRB 160827A: Swift detection of a burst
  26. Correction to Circular 19874 (on Swift trigger 71022)
  27. Swift Trigger 710022 is very likely noise
  28. GRB 160824B: CALET Gamma-Ray Burst Monitor detection
  29. GRB 160826A: Swift-BAT refined analysis
  30. GRB 160826A: Swift/UVOT Upper Limits
  31. GRB 160825A: not localized by Swift
  32. GRB 160820A: Fermi GBM observation
  33. GRB 160826A: Swift-XRT refined Analysis
  34. GRB160821A: Astrosat CZTI (veto) detection
  35. GRB 160826A: Swift detection of a burst
  36. GRB 160821A: CALET Gamma-Ray Burst Monitor detection
  37. GRB 160824A: 1.5m OSN I-band observation
  38. GRB 160824A: Swift-BAT refined analysis
  39. GRB 160824A: Swift/UVOT Possible Afterglow Detection
  40. GRB 160824A: Bassano Bresciano Observatory upper limits
  41. GRB 160824A: Swift-XRT refined Analysis
  42. GRB 160824B: Fermi GBM detection
  43. GRB 160824A: Swift detection of a burst
  44. Konus-Wind observation of GRB 160820A
  45. IPN Triangulation of GRB 160820A (short/hard)
  46. GRB 160822672: Fermi GBM detection
  47. GRB 160821B: Swift-BAT refined analysis
  48. GRB 160821B: Fermi GBM Detection
  49. GRB 160821B: Swift-XRT refined Analysis
  50. GRB 160821A: Swift-BAT refined analysis
  51. GRB 160821B: Swift/UVOT Upper Limits
  52. Short GRB 160821B: MASTER early optical observations
  53. GRB 160821A: Fermi-LAT refined analysis
  54. GRB 160821A: Fermi GBM Detection
  55. GRB 160821B: Swift detection of a short burst
  56. GRB 160821A: TAROT Calern observatory optical detection
  57. GRB 160821A: Fermi-LAT detection of a bright burst
  58. GRB 160821A: Swift detection of a bright burst
  59. BAT detection and localization of GRB 160819A
  60. GRB 160819A: Fermi GBM detection
  61. GRB 160816A: Further RATIR Optical and NIR Observations
  62. GRB 160815A: CALET Gamma-Ray Burst Monitor detection
  63. GRB 160816A: MASTER OT early detection on coaded images
  64. GRB 160816A: RATIR Optical and NIR Afterglow Confirmation
  65. GRB 160816A iTelescope observation
  66. Fermi GBM Observations of IceCube-160806A
  67. GRB 160814A: CALET Gamma-Ray Burst Monitor detection
  68. GRB 160816A: Swift/UVOT Detection
  69. GRB 160816A: RATIR Optical and NIR Observations
  70. GRB 160816A: LCOGT-FTN optical candidate
  71. GRB 160816A: MASTER inspection
  72. GRB 160816730A: Fermi GBM detection/observation
  73. GRB 160816A: Fermi-LAT detection
  74. GRB 160815A: Swift/UVOT Detection
  75. GRB 160815A: Swift-BAT refined analysis
  76. GRB 160815A: Swift-XRT refined Analysis
  77. GRB 160815A: Fermi GBM detection/observation
  78. GRB 160815A: Swift detection of a burst
  79. GRB 160804B: CALET Gamma-Ray Burst Monitor detection
  80. Fermi GBM trigger 160812507/492696620 is not a GRB
  81. INTEGRAL/SPI-ACS and IBIS_VETO search for prompt gamma-ray counterpart of IceCube-160806A
  82. Fermi GBM trigger 160810523/492525192 is not a GRB
  83. GRB 160806A: Fermi GBM observation
  84. Swift Trigger 707517 is not an astrophysical event
  85. GRB160802A - Astrosat CZTI detection
  86. Swift Trigger 707545 is likely 4U 1850-03/GS1843-02
  87. Swift Trigger 707517 is probably not a GRB
  88. GRB 160804A: RATIR Optical and NIR Observations
  89. GRB 160802A: CALET Gamma-Ray Burst Monitor detection
  90. IceCube-160731A: Konus-Wind limits
  91. GRB 160804A: GROND observations
  92. GRB 160804A: VLT/X-shooter redshift
  93. GRB 160804A: TNG optical observations, afterglow fading and candidate host galaxy
  94. GRB 160804A: Fermi GBM observation
  95. GRB160804A: MASTER-SAAO observation
  96. GRB 160804A: Swift-BAT refined analysis
  97. GRB 160804A: Swift/UVOT Detection
  98. GRB 160804A: Swift-XRT refined Analysis
  99. GRB 160804A: Swift detection of a burst
  100. IceCube-160731A: iPTF P48 Observations

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