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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"

19666 results found.

  1. GRB 130305A: Swift/XRT detection of the afterglow
  2. Konus-Wind observation of GRB 130305A
  3. GRB 130305A: Fermi GBM observation
  4. GRB 130305A: Fermi LAT Detection
  5. GRB 130305A found in ground analysis of Swift/BAT data
  6. GRB 121128A: optical upper limit in Maidanak observatory
  7. GRB 130216A: Swift/UVOT Upper Limit
  8. GRB 130219A: Suzaku WAM observation of the prompt emission
  9. SGR 1806-20 outburst (trigger 549841), Swift-BAT refined analysis
  10. Trigger 549841: Swift detection of SGR1806-20
  11. GRB 130216B: Suzaku WAM observation of the prompt emission
  12. GRB 130216A: possible radio counterpart is steady field source
  13. GRB 130216A: Swift/XRT observations
  14. IPN Triangulation of GRB 130219A
  15. GRB 130215A: Suzaku WAM observation of the prompt emission
  16. GRB 130215A: PTF P48 optical detection
  17. GRB 130216B: Swift/XRT observations
  18. GRB 130216A: Further Swift-BAT refined analysis
  19. GRB 130216B: MASTER-Net early observation
  20. GRB 130216A: MASTER-Net early observations
  21. GRB 130216A: Fermi GBM observation
  22. GRB 130216B: Fermi GBM observation
  23. GRB 130216B BAT refined analysis
  24. GRB 130216A: Swift-BAT refined analysis
  25. GRB 130216A: TAROT La Silla observatory optical observations
  26. GRB 130216B: Burst found in ground analysis of BAT data
  27. GRB 130216A: OSN I-band observations
  28. GRB 130216A: Swift detection of a burst
  29. GRB 130215A: GROND Detection of the Optical/NIR Afterglow
  30. GRB 130215A: Fermi GBM detection
  31. GRB 130215A: RAPTOR Measurements
  32. GRB 130215A: Swift-BAT refined analysis
  33. GRB 130215A: TAROT La Silla observatory optical observations
  34. GRB 130215A: P60 Observations
  35. GRB 130215A: ROTSE-III data analysis
  36. Skynet Observations of GRB130215
  37. GRB 130215: ROTSE-III Detection of Optical Counterpart
  38. GRB 130215A: Swift detection of a burst
  39. Swift GRB130206A: late XRT observations.
  40. GRB 130131B: CTIO 0.9-m optical upper-limits
  41. GRB 121128A: optical observations
  42. GRB 121123A: optical observations
  43. GRB 130211A: Swift/UVOT Upper Limits
  44. GRB 130211A: Swift-XRT refined Analysis
  45. GRB 130211A: Swift-BAT refined analysis
  46. GRB 130211A: GROND detection of the afterglow
  47. GRB 130211A: Swift detection of a burst
  48. GRB 130122A: PTF P48 optical upper limits
  49. GRB 130206A: GROND Observations
  50. GRB 130206A: Fermi LAT Observations
  51. GRB 130206A: Fermi GBM observation
  52. GRB 130206A: XRT and UVOT follow-up observations.
  53. GRB 130131B: optical upper limit in Mondy observatory
  54. GRB 130206A, Swift-BAT refined analysis
  55. GRB 130206A: Zadko observatory - Gingin optical observations
  56. Swift GRB 130206A - analysis of Swift/UVOT initial data.
  57. GRB 130206A: Swift-XRT observations
  58. GRB 130131A: optical observation in Mondy observatory
  59. GRB 130206A: Swift detection of a burst
  60. GRB 130131A: Swift/UVOT Upper Limits
  61. GRB 130131A: RAPTOR Limits During Gamma-Ray Emitting Interval
  62. GRB 130131B: Swift-XRT refined Analysis
  63. GRB 130131B: VLT/X-shooter acquisition camera limits
  64. GRB 130131B: GROND Upper limits
  65. GRB 130131A: CARMA 3mm Observations
  66. GRB 130131A: VLA 5.8 Ghz Detection
  67. GRB 130131B: IAC80 I-band observations
  68. GRB 130131B: Swift/UVOT Upper Limits
  69. GRB 130131A: Swift-XRT refined Analysis
  70. GRB 130131B: Enhanced Swift-XRT position
  71. GRB 130131B: Swift-BAT refined analysis
  72. GRB 130131A: Swift-BAT refined analysis
  73. GRB 130131B: TAROT Calern observatory optical observations
  74. GRB 130131B: Zadko observatory - Gingin optical observations
  75. GRB 130131A: Enhanced Swift-XRT position
  76. GRB 130131B: Swift detection of a burst
  77. GRB 130131A - Faulkes Telescope North Observations
  78. GRB 130131A: Swift detection of a burst
  79. Swift/BAT trigger 547142 is new source Swift J1753.7-2544
  80. Swift Trigger 547142: MAXI/GSC upper limit
  81. Swift Trigger 547142: a probable Galactic source
  82. GRB 130122A: CARMA 3mm Observations
  83. GRB 130122A: Swift/UVOT Detection
  84. GRB 130122A: Swift-BAT refined analysis
  85. GRB 130122A: Swift-XRT refined Analysis
  86. GRB 130122A: Enhanced Swift-XRT position
  87. GRB 130122A: MASTER-Net early marginal detection of the OT
  88. GRB 130122A: T100 observations
  89. GRB 130122A: Swift detection of a burst with an optical counterpart
  90. GRB 121225B: Suzaku WAM observation of the prompt emission
  91. GRB 130102A: Swift/UVOT Upper Limits
  92. GRB 130102A: P60 Observations
  93. GRB 130102A: Swift-BAT refined analysis
  94. GRB 130102A: MASTER-Net optical observations
  95. GRB 130102A: Swift-XRT refined Analysis
  96. GRB 130102A: Enhanced Swift-XRT position
  97. GRB 130102A: IAC80 I-band observations
  98. GRB 130102A: Swift detection of a burst
  99. Swift Trigger 544381 is a noise event
  100. GRB 121229A: Swift-XRT refined Analysis

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