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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"

19297 results found.

  1. GRB 070520B, Swift-BAT refined analysis
  2. GRB 070520A, Swift-BAT refined analysis
  3. GRB 070520A: Swift-XRT refined analysis
  4. GRB 070518: Swift-XRT refined analysis
  5. GRB070518: UVOT refined analysis
  6. GRB 070518, Swift-BAT refined analysis
  7. GRB 070518: Swift detection of a burst with optical afterglow
  8. GRB070517: Swift-XRT Refined Analysis
  9. GRB 070517, Swift-BAT refined analysis
  10. GRB 070517: Optical search
  11. GRB 070517: Swift detection of a burst
  12. GRB 070512: IPN localization and Konus spectrum of a bright burst
  13. GRB070419A: optical observations
  14. Konus-Wind and Konus-A observation of GRB 070508
  15. GRB 070510: Swift detection of a possible burst
  16. GRB070509: Swift-XRT Refined Analysis
  17. GRB 070509, Swift-BAT refined analysis
  18. GRB 070508: Suzaku/WAM observation of the prompt emission
  19. GRB070508: Swift/UVOT Observations
  20. GRB 070508, Swift-BAT refined analysis
  21. GRB 070508: Swift detection of an intense burst with an optical counterpart
  22. GRB070506: Swift/UVOT Observations
  23. GRB070506: Swift XRT refined analysis
  24. GRB 070506, Swift-BAT Refined Analysis
  25. GRB 070506: Swift detection of a burst with optical afterglow
  26. GRB 070429B, Swift-BAT refined analysis
  27. GRB 070429A, Swift-BAT refined analysis
  28. GRB 070429A: optical and NIR observations
  29. GRB 070429B: Swift XRT refined analysis
  30. GRB 070427, Swift-BAT Refined Analysis
  31. GRB 070411: Late-time Keck imaging
  32. GRB070419B: Suzaku WAM observation of the prompt emission
  33. GRB 070420, SMARTS optical/IR afterglow observations
  34. GRB 070411, deep LBT photometry
  35. Konus-Wind observation of GRB 070420
  36. GRB 070411: break in the optical light curve
  37. GRB 070420 Swift-BAT Refined Analysis
  38. GRB 070420: optical rebrightening observed at Mt. John
  39. GRB070420: Swift UVOT continuing observations
  40. GRB 070420: TAROT La Silla observatory optical observations
  41. GRB 070420: Swift detection of a burst with optical afterglow
  42. GRB 070419A: MITSuME Okayama Observations
  43. GRB 070419A: Early Super-LOTIS Observations
  44. GRB 070419B, Swift-BAT refined analysis
  45. GRB 070419A Swift-BAT Refined Analysis
  46. GRB 070419A, Optical observations
  47. GRB070419 - SDSS Pre-Burst Observations
  48. GRB 070419B optical afterglow candidate
  49. GRB 070419B: optical afterglow candidate
  50. GRB070419A, optical observation
  51. GRB 070406: Swift XRT refined analysis
  52. GRB 070412, Swift-BAT refined analysis
  53. GRB 070412: Gemini/GMOS afterglow candidate
  54. GRB 070411, Swift-BAT refined analysis
  55. GRB 070411 : Liverpool Telescope Observations
  56. GRB 070411: Swift detection of a burst with optical afterglow
  57. Suzaku ToO observation of SGR 1806-20
  58. GRB 070406, Swift-BAT refined analysis
  59. GRB 070406: further analysis of NOT images.
  60. Short GRB 070406 - Possible Bright Host Galaxy
  61. GRB 070406: Optical candidate
  62. GRB 070402: Suzaku WAM observation of the prompt emission
  63. GRB 070328: Suzaku WAM observation of the prompt emission
  64. GRB 070330, Swift-BAT refined analysis
  65. GRB 070330: Swift detection of a burst
  66. long burst from SGR 1806-20 detected on March 26
  67. GRB 070328: Swift/XRT Refined Analysis
  68. GRB 070328, Swift-BAT refined analysis
  69. Short-Hard GRB 070209: PROMPT Observations
  70. GRB070318: Swift UVOT continuing observations
  71. GRB 070318: Swift/UVOT Continued Observations
  72. GRB 070318, Swift-BAT refined analysis
  73. GRB 070318: Swift detection of a burst with an optical afterglow
  74. GRB 070311: Late Central Engine Activity Optical Flare??
  75. GRB 070311: SARA upper limit
  76. GRB 070309: variability of the XRT afterglow candidate
  77. GRB 070311: MITSuME Okayama Optical Observation
  78. GRB 070311: Swift-XRT refined analysis
  79. GRB 070311: a long GRB detected by INTEGRAL
  80. GRB060901: Candidate optical afterglow
  81. GRB 070125: Chandra X-ray Confirmation of Jet Break
  82. GRB 070306, optical observation
  83. GRB 070309: A long GRB detected by INTEGRAL
  84. GRB 070125: X-ray light curve analysis
  85. GRB 070306: NOT observations
  86. GRB 070306: ART-3 early optical and near infrared constraints
  87. GRB 070306, Swift-BAT refined analysis
  88. GRB 070306: XRT Team Refined Analysis
  89. GRB070306 - SDSS Pre-burst Observations
  90. GRB070227: Swift-XRT refined analysis
  91. GRB 070227, Swift-BAT refined analysis
  92. GRB070224: Swift-XRT Refined Analysis
  93. GRB 070224: optical afterglow candidate
  94. GRB 070224, Swift-BAT refined analysis
  95. GRB 070223, Swift-BAT refined analysis
  96. GRB070223: MASTER-VWF-Kislovodsk observations
  97. GRB 070223: Swift-XRT Refined Analysis
  98. GRB070223 - SDSS Pre-Burst Observations
  99. GRB 070223: MDM Observations
  100. GRB 070220: MITSuME Okayama Optical Observation

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