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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"

41938 results found.

  1. GRB 160821A: TAROT Calern observatory optical detection
  2. GRB 160821A: Fermi-LAT detection of a bright burst
  3. GRB 160821A: Swift detection of a bright burst
  4. GRB 160816A: TSHAO optical observations
  5. INTEGRAL/SPI-ACS observation of IceCube HESE 128340 58537957
  6. BAT detection and localization of GRB 160819A
  7. GRB 160819A: Fermi GBM detection
  8. GRB 160816A: ISON/UAFO optical observations
  9. GRB 160816A: Further RATIR Optical and NIR Observations
  10. GRB 160815A: CALET Gamma-Ray Burst Monitor detection
  11. GRB 160816A: MASTER OT early detection on coaded images
  12. GRB 160816A: RATIR Optical and NIR Afterglow Confirmation
  13. GRB 160816A: confirmed fading with the LT
  14. GRB 160816A iTelescope observation
  15. Fermi GBM Observations of IceCube-160806A
  16. GRB 160814A: CALET Gamma-Ray Burst Monitor detection
  17. GRB 160816A: Swift/UVOT Detection
  18. GRB 160816A: IPN annulus
  19. GRB 160804A: 15 GHz detections and upper limit from AMI
  20. GRB 160801A: 15 GHz upper limits from AMI
  21. GRB 160714A: 15 GHz upper limits from AMI
  22. Konus-Wind observation of GRB 160816A
  23. GRB 160816A: RATIR Optical and NIR Observations
  24. GRB 160816A: LCOGT-FTN optical candidate
  25. GRB 160815A: GWAC-F60A upper limit
  26. GRB 160816A: Swift-XRT afterglow detection
  27. GRB 160816A: MASTER inspection
  28. GRB 160816730A: Fermi GBM detection/observation
  29. GRB 160816A: Swift ToO observations
  30. GRB 160816A: Fermi-LAT detection
  31. GRB 160815A: Swift/UVOT Detection
  32. Konus-Wind observation of GRB 160814A
  33. GRB 160815A: Swift-BAT refined analysis
  34. GRB 160815A: Swift-XRT refined Analysis
  35. GRB 160815A: Fermi GBM detection/observation
  36. GRB 160815A: Swift/UVOT Afterglow Detection
  37. GRB 160815A: Swift detection of a burst
  38. GRB 160814A: MAXI/GSC detection
  39. GRB 160804B: CALET Gamma-Ray Burst Monitor detection
  40. IceCube 160806A: Lomonosov BDRG gamma ray prompt observations
  41. Fermi GBM trigger 160812507/492696620 is not a GRB
  42. INTEGRAL/SPI-ACS and IBIS_VETO search for prompt gamma-ray counterpart of IceCube-160806A
  43. Fermi GBM trigger 160810523/492525192 is not a GRB
  44. IceCube 160806A EHE Neutrino Candidate Event
  45. GRB 160806A: Fermi GBM observation
  46. Konus-Wind observation of GRB 160806A
  47. IPN Triangulation of GRB 160806A
  48. Swift Trigger 707517 is not an astrophysical event
  49. GRB160802A - Astrosat CZTI detection
  50. Swift Trigger 707545 is likely 4U 1850-03/GS1843-02
  51. Swift Trigger 707517 is probably not a GRB
  52. GRB 160804A: RATIR Optical and NIR Observations
  53. GRB 160802A: CALET Gamma-Ray Burst Monitor detection
  54. IceCube-160731A: Konus-Wind limits
  55. GRB 160804A: TSHAO optical observations
  56. GRB 160804A: ISON/UAFO optical observations
  57. GRB 160804A: GROND observations
  58. GRB 160804A: VLT/X-shooter redshift
  59. Search for counterpart to IceCube-160731A with ANTARES
  60. GRB 160804A: SAO RAS optical observations
  61. GRB 160804A: TNG optical observations, afterglow fading and candidate host galaxy
  62. GRB 160804A: Fermi GBM observation
  63. GRB160804A: MASTER-SAAO observation
  64. Konus-Wind observation of GRB 160802A
  65. IPN Triangulation of GRB 160802A
  66. GRB 160804A: Swift-BAT refined analysis
  67. GRB 160804A: Swift/UVOT Detection
  68. GRB 160804A: Swift-XRT refined Analysis
  69. GRB 160804A: Swift detection of a burst
  70. IceCube-160731A: iPTF P48 Observations
  71. GRB 160802A: Lomonosov BDRG gamma ray detection
  72. GRB 160801A: TSHAO optical observations
  73. GRB 160801A: Swift/UVOT Upper Limits
  74. GRB 160801A: SAO RAS optical observations
  75. GRB 160802A: Fermi GBM detection
  76. GRB 160801A: NOT upper limits
  77. FACT follow-up of IceCube20160731
  78. GRB 160726A: CALET Gamma-Ray Burst Monitor detection
  79. GRB 160801A: Swift-XRT refined Analysis
  80. GRB 160801A: Swift-BAT refined analysis
  81. Global MASTER net follow up of IceCube-160731A
  82. Swift follow up of IceCube-160731A
  83. GRB 160801A: MITSuME Okayama upper limits
  84. GRB 160801A: Swift detection of a burst
  85. HAWC follow up of IceCube 160731
  86. GRB 160716A: TAROT La Silla observatory optical observations
  87. GRB160720A: Astrosat CZTI detection
  88. GRB160709A: Astrosat CZTI detection of short GRB
  89. GRB160703A: Astrosat CZTI detection
  90. GRB 160705B: 15 GHz upper limits from AMI
  91. GRB 160703A: 15 GHz upper limits from AMI
  92. GBM observation of SGR-like burst from the direction of PSR 1119-6127
  93. Trigger 706396: Swift detection of a short burst from PSR 1119-6127
  94. GRB 160726A, Swift-BAT refined analysis
  95. Konus-Wind observation of short GRB 160726A
  96. GRB 160726A: Fermi GBM observation
  97. GRB 160726A: Swift detection of a short burst
  98. GRB 160721A: CALET Gamma-Ray Burst Monitor detection
  99. GRB 160720A CALET Gamma-Ray Burst Monitor detection
  100. GRB 160720A: Lomonosov BDRG gamma ray detection and MASTER limit

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