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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"

19665 results found.

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

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