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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"

19670 results found.

  1. GRB 071122: ROTSE-III Optical Limits
  2. GRB 071122: Swift detection of a burst
  3. Swift/UVOT observations of GRB071118
  4. GRB 071117: Swift-XRT revised position
  5. Konus-Wind and Konus-A observations of GRB 071117
  6. Swift XRT follow-up observations of GRB071008
  7. Swift/UVOT upper limits for GRB 071117
  8. GRB071118: Swift XRT refined analysis
  9. GRB 071118, Swift-BAT refined analysis
  10. GRB 071117: TAROT La Silla observatory optical observations
  11. GRB 071118: Swift detection of a burst
  12. GRB 071117: Swift-XRT refined analysis
  13. GRB 071117, Swift-BAT refined analysis
  14. GRB 071117: Swift/XRT position
  15. GRB 071117: Initial Swift/UVOT observations
  16. GRB 071117: Swift detection of a bright burst
  17. Swift detection of MXB 0656-072
  18. VLA radio upper limit on GRB 071112C
  19. ATCA radio observations of short hard burst GRB 071112B
  20. Correction to the Swift-BAT Transient Identification (trigger=296683)
  21. GRB 071112C: Swift-BAT refined analysis
  22. GRB 071112C: Swift/UVOT observations
  23. GRB 071112C: Swift XRT refined analysis
  24. Swift UVOT upper limits of GRB071112B
  25. GRB 071112B: Swift-XRT preliminary analysis
  26. GRB 071112B, Swift-BAT partial refined analysis of the SHB
  27. Swift-BAT trigger 296491 is not a GRB
  28. GRB 071112C: TAROT Calern observatory optical observations
  29. Swift XRT follow-up observations of GRB071028B
  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. VLA IInd observation of INTEGRAL burst GRB 071109
  36. Swift/UVOT initial analysis of GRB071109
  37. GRB 071109: further Swift-XRT analysis
  38. No radio detection at Swift-XRT position
  39. GRB 071109: Swift-XRT possible X-ray counterpart
  40. GRB 071104: Swift-XRT Team Refined Analysis
  41. GRB 071104: Possible Swift UVOT Afterglow Candidate
  42. GRB 071104: Swift-XRT position
  43. Swift XRT and UVOT observations of GRB071028B
  44. GRB 071101, Swift-BAT refined analysis
  45. GRB 071101: Swift-XRT Team refined analysis
  46. GRB 071101: TAROT Calern observatory optical observations
  47. GRB 071101: Swift XRT position
  48. GRB 071101: BOOTES-2 prompt optical observations
  49. GRB 071101: a nearby galaxy
  50. GRB 071101: Swift detection of a burst
  51. GRB 071031, Swift-BAT refined analysis
  52. GRB 071031: Swift/UVOT detection of afterglow
  53. GRB 071031: Swift-XRT Team refined analysis
  54. GRB 071031: Swift detection of a burst with an optical counterpart
  55. GRB 071028B Swift-BAT detection of a burst
  56. Swift UVOT upper limits to GRB071028
  57. GRB 071028: Swift-XRT Team refined analysis
  58. GRB 071028, Swift-BAT refined analysis
  59. GRB 071028: Swift detection of a burst
  60. GRB 071025: Kuiper Telescope Optical Observations
  61. GRB 071018: Revised BAT position
  62. GRB 071025A: RAPTOR Observations of Complex Early Optical Behavior
  63. GRB071021: MARGE Optical Limits
  64. GRB071020, optical upper limit
  65. GRB 071025 Milagro GeV/TeV Observations
  66. Swift UVOT upper limits
  67. GRB 071025: Swift-XRT Team refined analysis
  68. GRB 071025, Swift-BAT refined analysis
  69. GRB 071025: Early Super-LOTIS Observations
  70. GRB 071025: ROTSE-III Refined Analysis
  71. GRB 071025: Swift XRT refined position
  72. GRB 071025: ROTSE-III Detection of Optical Counterpart
  73. GRB 071025: Swift detection of a burst
  74. GRB 071020: BTA spectroscopy
  75. Possible radio detection of GRB 071021 with the VLA
  76. Radio detection of GRB 071020 with the VLA
  77. GRB 071021: optical and NIR observations
  78. GRB 071021, Swift-BAT refined analysis
  79. GRB 071021: Swift-XRT Team refined analysis
  80. Konus-Wind observation of GRB 071020
  81. GRB 071021: Swift detection of a burst
  82. GRB 071020: Swift-XRT refined analysis
  83. GRB 071020, Swift-BAT refined analysis
  84. GRB 071020: ROTSE-III Analysis of Optical Counterpart
  85. GRB071020 - SDSS Pre-burst Observations
  86. GRB 071020: Swift detection of a bright burst
  87. GRB 071020A: ROTSE-III Detection of Optical Counterpart
  88. GRB 071018: Mercator Telescope optical observations
  89. Swift autonomous slewing re-enabled
  90. GRB 071018: Swift-XRT observation
  91. GRB 071017 - Swift XRT observations
  92. VLA radio observation of GRB 071018
  93. GRB 071010A: Late-time Keck/LRIS photometry - possible host galaxy and jet break
  94. GRB 071018, Swift-BAT refined analysis
  95. GRB 071018?: Swift detection of a possible burst
  96. GRB 071010B: Suzaku WAM observation of the prompt emission
  97. GRB 071013: 3rd TLS Epoch - constraints on variability
  98. GRB 071013: TLS Upper Limit
  99. VLA detection of radio afterglow of GRB 071010B
  100. VLA non-detection of GRB 071011

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