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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"

37681 results found.

  1. GRB 160827A: Swift-BAT refined analysis
  2. GRB 160827A: Swift detection of a burst
  3. GRB 160824B: CALET Gamma-Ray Burst Monitor detection
  4. GRB 160826A: Swift-BAT refined analysis
  5. GRB 160826A: Swift/UVOT Upper Limits
  6. GRB 160825A: not localized by Swift
  7. GRB 160820A: Fermi GBM observation
  8. GRB 160826A: Swift-XRT refined Analysis
  9. GRB160821A: Astrosat CZTI (veto) detection
  10. GRB 160826A: Swift detection of a burst
  11. GRB 160821A: CALET Gamma-Ray Burst Monitor detection
  12. GRB 160825A: Swift ToO observations
  13. GRB 160824A: 1.5m OSN I-band observation
  14. GRB 160824A: ISON/Terskol optical observations
  15. GRB 160824A: Swift-BAT refined analysis
  16. GRB 160824A: Swift/UVOT Possible Afterglow Detection
  17. GRB 160824A: Bassano Bresciano Observatory upper limits
  18. GRB 160824A: Swift-XRT refined Analysis
  19. GRB 160824A: Enhanced Swift-XRT position
  20. GRB 160824B: Fermi GBM detection
  21. GRB 160824A: Swift detection of a burst
  22. GRB 160821B: VLA 5.0 GHz observations
  23. Konus-Wind observation of GRB 160822A
  24. IPN Triangulation of GRB 160822A (short/hard)
  25. Konus-Wind observation of GRB 160820A
  26. IPN Triangulation of GRB 160820A (short/hard)
  27. Possible radio detection of GRB160703A with the GMRT
  28. Possible radio detection of GRB160623A with the GMRT
  29. GRB 160821B: GTC follow-up observation
  30. GRB 160821B: WHT afterglow confirmation and redshift of candidate host
  31. GRB 160822672: Fermi GBM detection
  32. GRB 160821B: Swift-BAT refined analysis
  33. GRB 160821B: Fermi GBM Detection
  34. Konus-Wind observation of GRB 160821A
  35. GRB 160821B: Swift-XRT refined Analysis
  36. GRB 160821A: Swift-BAT refined analysis
  37. GRB 160821B: Swift/UVOT Upper Limits
  38. Short GRB 160821B: MASTER early optical observations
  39. GRB 160821B: Enhanced Swift-XRT position
  40. GRB 160821A: Fermi-LAT refined analysis
  41. GRB 160821A: Fermi GBM Detection
  42. GRB 160821B: NOT optical afterglow candidate
  43. GRB 160821B: Swift detection of a short burst
  44. GRB 160821A: TAROT Calern observatory optical detection
  45. GRB 160821A: Fermi-LAT detection of a bright burst
  46. GRB 160821A: Swift detection of a bright burst
  47. GRB 160816A: TSHAO optical observations
  48. INTEGRAL/SPI-ACS observation of IceCube HESE 128340 58537957
  49. BAT detection and localization of GRB 160819A
  50. GRB 160819A: Fermi GBM detection
  51. GRB 160816A: ISON/UAFO optical observations
  52. GRB 160816A: Further RATIR Optical and NIR Observations
  53. GRB 160815A: CALET Gamma-Ray Burst Monitor detection
  54. IBAS Alert 7534: Not a real GRB
  55. GRB 160816A: MASTER OT early detection on coaded images
  56. GRB 160816A: RATIR Optical and NIR Afterglow Confirmation
  57. GRB 160816A: confirmed fading with the LT
  58. GRB 160816A iTelescope observation
  59. Fermi GBM Observations of IceCube-160806A
  60. GRB 160814A: CALET Gamma-Ray Burst Monitor detection
  61. GRB 160816A: Swift/UVOT Detection
  62. GRB 160816A: IPN annulus
  63. GRB 160804A: 15 GHz detections and upper limit from AMI
  64. GRB 160801A: 15 GHz upper limits from AMI
  65. GRB 160714A: 15 GHz upper limits from AMI
  66. Konus-Wind observation of GRB 160816A
  67. GRB 160816A: RATIR Optical and NIR Observations
  68. GRB 160816A: LCOGT-FTN optical candidate
  69. GRB 160815A: GWAC-F60A upper limit
  70. GRB 160816A: Swift-XRT afterglow detection
  71. GRB 160816A: MASTER inspection
  72. GRB 160816730A: Fermi GBM detection/observation
  73. GRB 160816A: Swift ToO observations
  74. GRB 160816A: Fermi-LAT detection
  75. GRB 160815A: Swift/UVOT Detection
  76. Konus-Wind observation of GRB 160814A
  77. GRB 160815A: Swift-BAT refined analysis
  78. GRB 160815A: Swift-XRT refined Analysis
  79. GRB 160815A: Fermi GBM detection/observation
  80. GRB 160815A: Enhanced Swift-XRT position
  81. GRB 160815A: Swift/UVOT Afterglow Detection
  82. GRB 160815A: Swift detection of a burst
  83. GRB 160814A: MAXI/GSC detection
  84. GRB 160804B: CALET Gamma-Ray Burst Monitor detection
  85. IceCube 160806A: Lomonosov BDRG gamma ray prompt observations
  86. Fermi GBM trigger 160812507/492696620 is not a GRB
  87. INTEGRAL/SPI-ACS and IBIS_VETO search for prompt gamma-ray counterpart of IceCube-160806A
  88. Fermi GBM trigger 160810523/492525192 is not a GRB
  89. GRB 160806A: Fermi GBM observation
  90. Konus-Wind observation of GRB 160806A
  91. IPN Triangulation of GRB 160806A
  92. Swift Trigger 707517 is not an astrophysical event
  93. GRB160802A - Astrosat CZTI detection
  94. Swift Trigger 707517 is probably not a GRB
  95. GRB 160804A: RATIR Optical and NIR Observations
  96. GRB 160802A: CALET Gamma-Ray Burst Monitor detection
  97. IceCube-160731A: Konus-Wind limits
  98. GRB 160804A: TSHAO optical observations
  99. GRB 160804A: ISON/UAFO optical observations
  100. GRB 160804A: GROND observations

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