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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"

27948 results found.

  1. GRB 130216A: Swift-BAT refined analysis
  2. GRB 130216A: TAROT La Silla observatory optical observations
  3. GRB 130216B: Burst found in ground analysis of BAT data
  4. GRB 130216A: OSN I-band observations
  5. GRB 130216A: Swift detection of a burst
  6. GRB 130215A: GROND Detection of the Optical/NIR Afterglow
  7. GRB 130215A: Fermi GBM detection
  8. GRB 130215A: RAPTOR Measurements
  9. GRB 130215A: Swift-BAT refined analysis
  10. GRB 130215A: TAROT La Silla observatory optical observations
  11. GRB 130215A: CARMA 3mm detection
  12. GRB 130215A: P60 Observations
  13. GRB 130215A: ROTSE-III data analysis
  14. Skynet Observations of GRB130215
  15. GRB 130215: ROTSE-III Detection of Optical Counterpart
  16. GRB 130215A: Swift detection of a burst
  17. Swift GRB130206A: late XRT observations.
  18. GRB 130131B: CTIO 0.9-m optical upper-limits
  19. GRB 121128A: optical observations
  20. GRB 121123A: optical observations
  21. GRB 130211A: Swift/UVOT Upper Limits
  22. GRB 130211A: Swift-XRT refined Analysis
  23. GRB 130211A: Swift-BAT refined analysis
  24. GRB 130211A: GROND detection of the afterglow
  25. GRB 130211A: Swift detection of a burst
  26. GRB 130122A: PTF P48 optical upper limits
  27. GRB 130206A: GROND Observations
  28. GRB 130206A: Fermi LAT Observations
  29. GRB 130206A: Fermi GBM observation
  30. GRB 130206A: XRT and UVOT follow-up observations.
  31. GRB 130131B: optical upper limit in Mondy observatory
  32. GRB 130206A, Swift-BAT refined analysis
  33. GRB 130206A: Zadko observatory - Gingin optical observations
  34. Swift GRB 130206A - analysis of Swift/UVOT initial data.
  35. GRB 130206A: Swift-XRT observations
  36. GRB 130131A: optical observation in Mondy observatory
  37. GRB 130206A: Swift detection of a burst
  38. GRB 130131A: Swift/UVOT Upper Limits
  39. GRB 130131A: RAPTOR Limits During Gamma-Ray Emitting Interval
  40. GRB 130131B: Swift-XRT refined Analysis
  41. GRB 130131A - UKIRT confirmation of afterglow
  42. GRB 130131B: VLT/X-shooter acquisition camera limits
  43. GRB 130131B: GROND Upper limits
  44. GRB 130131A: CARMA 3mm Observations
  45. GRB 130131A: VLA 5.8 Ghz Detection
  46. GRB 130131B: IAC80 I-band observations
  47. GRB 130131B: Swift/UVOT Upper Limits
  48. GRB 130131A: Swift-XRT refined Analysis
  49. GRB 130131B: Enhanced Swift-XRT position
  50. GRB 130131B: Swift-BAT refined analysis
  51. GRB 130131A: Swift-BAT refined analysis
  52. GRB 130131B: TAROT Calern observatory optical observations
  53. GRB 130131B: Zadko observatory - Gingin optical observations
  54. GRB 130131A: Enhanced Swift-XRT position
  55. GRB 130131B: Swift detection of a burst
  56. GRB 130131A - Faulkes Telescope North Observations
  57. GRB 130131A: Swift detection of a burst
  58. Swift/BAT trigger 547142 is new source Swift J1753.7-2544
  59. GRB 130127A: Fermi GBM detection
  60. Swift Trigger 547142: MAXI/GSC upper limit
  61. Swift Trigger 547142: a probable Galactic source
  62. GRB 130122A: CARMA 3mm Observations
  63. GRB 130122A: Swift/UVOT Detection
  64. GRB 130122A: RATIR Detection
  65. GRB 130122A: Swift-BAT refined analysis
  66. GRB 130122A: Swift-XRT refined Analysis
  67. GRB 130122A: Enhanced Swift-XRT position
  68. GRB 130122A: MASTER-Net early marginal detection of the OT
  69. GRB 130122A: T100 observations
  70. GRB 130122A: Swift detection of a burst with an optical counterpart
  71. Short GRB 121226A: TNG observation of the host galaxy
  72. GRB 121225B: Suzaku WAM observation of the prompt emission
  73. GRB 130102A: Swift/UVOT Upper Limits
  74. GRB 130102A: P60 Observations
  75. GRB 130102A: Swift-BAT refined analysis
  76. GRB 130102A: MASTER-Net optical observations
  77. GRB 130102A: Swift-XRT refined Analysis
  78. GRB 130102B: MAXI/GSC detection
  79. GRB 130102A: Enhanced Swift-XRT position
  80. GRB 130102A: IAC80 I-band observations
  81. GRB 130102A: Swift detection of a burst
  82. Swift Trigger 544381 is a noise event
  83. GRB 121229A: Swift-XRT refined Analysis
  84. GRB 121229A, Swift-BAT refined analysis
  85. GRB 121229A: Swift/UVOT Upper Limits
  86. GRB 121229A: Enhanced Swift-XRT position
  87. Swift Trigger 544381 is unlikely to be a GRB
  88. GRB 121229A: MAXI/GSC detection
  89. GRB 121229A: GROND detection of the afterglow
  90. GRB 121229A: Swift detection of a burst
  91. GRB 121226A: Swift/UVOT Upper Limits
  92. GRB 121226A: Swift-XRT refined Analysis
  93. GRB 121226A, Swift-BAT refined analysis
  94. GRB 121226A: Optical Observations
  95. GRB 121226A: Zadko observatory - Gingin optical observations
  96. GRB 121226A: BOOTES-4/MET optical observations
  97. GRB 121226A: Swift detection of a burst
  98. Konus-Wind observation of GRB 121225B
  99. GRB 121225B: Fermi LAT Detection
  100. GRB 121225A: MAXI/GSC detection

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