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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"

29079 results found.

  1. GRB 071122 Swift-XRT refined analysis
  2. GRB 071122: ROTSE-III Optical Limits
  3. GRB 071122: Swift detection of a burst
  4. GRB071118 MITSuME OAO optical observation
  5. Swift/UVOT observations of GRB071118
  6. GRB 071117: Swift-XRT revised position
  7. Konus-Wind and Konus-A observations of GRB 071117
  8. Swift XRT follow-up observations of GRB071008
  9. Swift/UVOT upper limits for GRB 071117
  10. GRB071118: Swift XRT refined analysis
  11. GRB 071118, Swift-BAT refined analysis
  12. GRB 071117: TAROT La Silla observatory optical observations
  13. GRB 071118: Swift detection of a burst
  14. GRB 071117: Swift-XRT refined analysis
  15. GRB 071117, Swift-BAT refined analysis
  16. GRB 071117: Initial Swift/UVOT observations
  17. GRB 071117: Swift detection of a bright burst
  18. Swift detection of MXB 0656-072
  19. Correction to the Swift-BAT Transient Identification (trigger=296683)
  20. GRB 071112C MITSuME Akeno early optical observation
  21. GRB 071112C: SARA upper limit
  22. GRB 071112C: Swift-BAT refined analysis
  23. GRB 071112C: Swift/UVOT observations
  24. GRB 071112C: Swift XRT refined analysis
  25. Swift UVOT upper limits of GRB071112B
  26. GRB 071112B: Swift-XRT preliminary analysis
  27. GRB 071112B, Swift-BAT partial refined analysis of the SHB
  28. Swift-BAT trigger 296491 is not a GRB
  29. GRB 071112C: TAROT Calern observatory optical observations
  30. GRB 071112C: ROTSE-III Confirmation of Optical Counterpart
  31. GRB 071112B: ROTSE-III Rapid Optical Limits
  32. GRB 071112C: Swift detection of a burst with an optical counterpart
  33. GRB 071112B: Swift detection of a short hard burst
  34. GRB 071112: Swift detection of a possible burst
  35. Swift/UVOT initial analysis of GRB071109
  36. GRB 071109: further Swift-XRT analysis
  37. GRB 071109: TAROT Calern observatory optical observations
  38. GRB 071109: Swift-XRT possible X-ray counterpart
  39. GRB 071104: Swift-XRT Team Refined Analysis
  40. GRB 071104: Possible Swift UVOT Afterglow Candidate
  41. GRB 071104: Swift-XRT position
  42. GRB 071101, Swift-BAT refined analysis
  43. GRB 071101: TAROT Calern observatory optical observations
  44. GRB 071101: Swift XRT position
  45. GRB 071101: Swift detection of a burst
  46. GRB 071031, Swift-BAT refined analysis
  47. GRB 071031: Swift/UVOT detection of afterglow
  48. GRB 071020: MITSuME Akeno optical observations
  49. GRB 071031: VLT high-resolution spectroscopy
  50. GRB 071031: GROND detection in all bands
  51. GRB 071031: Swift detection of a burst with an optical counterpart
  52. GRB 071028B Swift-BAT detection of a burst
  53. GRB 071028: SARA observations of variable source
  54. Swift UVOT upper limits to GRB071028
  55. GRB 071028, Swift-BAT refined analysis
  56. GRB 071028: Swift detection of a burst
  57. GRB 071025: Kuiper Telescope Optical Observations
  58. GRB 071025A: RAPTOR Observations of Complex Early Optical Behavior
  59. GRB071021: MARGE Optical Limits
  60. GRB071020, optical upper limit
  61. GRB 071025: SARA VRI upper limits
  62. GRB 071025A: Complex Early-Time IR Behavior, Simultaneous with Gamma- and X-rays
  63. Swift UVOT upper limits
  64. GRB 071025, Swift-BAT refined analysis
  65. GRB 071025: Early Super-LOTIS Observations
  66. GRB 071025: ROTSE-III Refined Analysis
  67. GRB 071025a: PAIRITEL observations
  68. GRB 071025: ROTSE-III Detection of Optical Counterpart
  69. GRB 071025: Swift detection of a burst
  70. GRB 071020: SARA observations
  71. GRB071021: MITSuME Okayama Optical Upper Limits
  72. GRB 071021: optical and NIR observations
  73. GRB 071021, Swift-BAT refined analysis
  74. GRB 071021: Swift-XRT Team refined analysis
  75. Konus-Wind observation of GRB 071020
  76. GRB 071021: Faulkes Telescope South optical candidate
  77. GRB 071021: Swift detection of a burst
  78. GRB 071010B: Independent Confirmation of Break
  79. GRB 071020: Swift-XRT refined analysis
  80. GRB 071020, Swift-BAT refined analysis
  81. GRB 071020: ROTSE-III Analysis of Optical Counterpart
  82. GRB071020 - SDSS Pre-burst Observations
  83. GRB 071020: Swift detection of a bright burst
  84. GRB 071020A: ROTSE-III Detection of Optical Counterpart
  85. GRB 071018: Mercator Telescope optical observations
  86. GRB 071018: SARA observations
  87. GRB 071018: Swift-XRT observation
  88. GRB 071017 - Swift XRT observations
  89. GRB 071010A: Late-time Keck/LRIS photometry - possible host galaxy and jet break
  90. GRB 071018, Swift-BAT refined analysis
  91. GRB 071018?: Swift detection of a possible burst
  92. GRB 071010B: Suzaku WAM observation of the prompt emission
  93. GRB 071011: MITSuME Optical Observations
  94. GRB 071010B: Photometry after 1.6 days
  95. GRB 071013, Swift-BAT refined analysis
  96. GRB 071013: Swift detection of a burst
  97. GRB 071010C Swift-BAT detection of a burst
  98. GRB 071011: Optical Limit after 13.95hrs
  99. GRB 071011: Swift-XRT refined analysis
  100. GRB 071010B: Optical Detection

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