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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"

19668 results found.

  1. GRB 071117: Swift-XRT revised position
  2. Konus-Wind and Konus-A observations of GRB 071117
  3. Swift XRT follow-up observations of GRB071008
  4. Swift/UVOT upper limits for GRB 071117
  5. GRB071118: Swift XRT refined analysis
  6. GRB 071118, Swift-BAT refined analysis
  7. GRB 071117: TAROT La Silla observatory optical observations
  8. GRB 071118: Swift detection of a burst
  9. GRB 071117: Swift-XRT refined analysis
  10. GRB 071117, Swift-BAT refined analysis
  11. GRB 071117: Swift/XRT position
  12. GRB 071117: Initial Swift/UVOT observations
  13. GRB 071117: Swift detection of a bright burst
  14. Swift detection of MXB 0656-072
  15. VLA radio upper limit on GRB 071112C
  16. ATCA radio observations of short hard burst GRB 071112B
  17. Correction to the Swift-BAT Transient Identification (trigger=296683)
  18. GRB 071112C: Swift-BAT refined analysis
  19. GRB 071112C: Swift/UVOT observations
  20. GRB 071112C: Swift XRT refined analysis
  21. Swift UVOT upper limits of GRB071112B
  22. GRB 071112B: Swift-XRT preliminary analysis
  23. GRB 071112B, Swift-BAT partial refined analysis of the SHB
  24. Swift-BAT trigger 296491 is not a GRB
  25. GRB 071112C: TAROT Calern observatory optical observations
  26. Swift XRT follow-up observations of GRB071028B
  27. GRB 071112C: ROTSE-III Confirmation of Optical Counterpart
  28. GRB 071112B: ROTSE-III Rapid Optical Limits
  29. GRB 071112C: Swift detection of a burst with an optical counterpart
  30. GRB 071112B: Swift detection of a short hard burst
  31. GRB 071112: Swift detection of a possible burst
  32. VLA IInd observation of INTEGRAL burst GRB 071109
  33. Swift/UVOT initial analysis of GRB071109
  34. GRB 071109: further Swift-XRT analysis
  35. No radio detection at Swift-XRT position
  36. GRB 071109: Swift-XRT possible X-ray counterpart
  37. GRB 071104: Swift-XRT Team Refined Analysis
  38. GRB 071104: Possible Swift UVOT Afterglow Candidate
  39. GRB 071104: Swift-XRT position
  40. Swift XRT and UVOT observations of GRB071028B
  41. GRB 071101, Swift-BAT refined analysis
  42. GRB 071101: Swift-XRT Team refined analysis
  43. GRB 071101: TAROT Calern observatory optical observations
  44. GRB 071101: Swift XRT position
  45. GRB 071101: BOOTES-2 prompt optical observations
  46. GRB 071101: a nearby galaxy
  47. GRB 071101: Swift detection of a burst
  48. GRB 071031, Swift-BAT refined analysis
  49. GRB 071031: Swift/UVOT detection of afterglow
  50. GRB 071031: Swift-XRT Team refined analysis
  51. GRB 071031: Swift detection of a burst with an optical counterpart
  52. GRB 071028B Swift-BAT detection of a burst
  53. Swift UVOT upper limits to GRB071028
  54. GRB 071028: Swift-XRT Team refined analysis
  55. GRB 071028, Swift-BAT refined analysis
  56. GRB 071028: Swift detection of a burst
  57. GRB 071025: Kuiper Telescope Optical Observations
  58. GRB 071018: Revised BAT position
  59. GRB 071025A: RAPTOR Observations of Complex Early Optical Behavior
  60. GRB071021: MARGE Optical Limits
  61. GRB071020, optical upper limit
  62. GRB 071025 Milagro GeV/TeV Observations
  63. Swift UVOT upper limits
  64. GRB 071025: Swift-XRT Team refined analysis
  65. GRB 071025, Swift-BAT refined analysis
  66. GRB 071025: Early Super-LOTIS Observations
  67. GRB 071025: ROTSE-III Refined Analysis
  68. GRB 071025: Swift XRT refined position
  69. GRB 071025: ROTSE-III Detection of Optical Counterpart
  70. GRB 071025: Swift detection of a burst
  71. GRB 071020: BTA spectroscopy
  72. Possible radio detection of GRB 071021 with the VLA
  73. Radio detection of GRB 071020 with the VLA
  74. GRB 071021: optical and NIR observations
  75. GRB 071021, Swift-BAT refined analysis
  76. GRB 071021: Swift-XRT Team refined analysis
  77. Konus-Wind observation of GRB 071020
  78. GRB 071021: Swift detection of a burst
  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. Swift autonomous slewing re-enabled
  87. GRB 071018: Swift-XRT observation
  88. GRB 071017 - Swift XRT observations
  89. VLA radio observation of GRB 071018
  90. GRB 071010A: Late-time Keck/LRIS photometry - possible host galaxy and jet break
  91. GRB 071018, Swift-BAT refined analysis
  92. GRB 071018?: Swift detection of a possible burst
  93. GRB 071010B: Suzaku WAM observation of the prompt emission
  94. GRB 071013: 3rd TLS Epoch - constraints on variability
  95. GRB 071013: TLS Upper Limit
  96. VLA detection of radio afterglow of GRB 071010B
  97. VLA non-detection of GRB 071011
  98. GRB 071013: Optical observations
  99. GRB 071013, Swift-BAT refined analysis
  100. GRB 071013: Swift detection of a burst

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