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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"

19305 results found.

  1. GRB 070521: Keck imaging
  2. GRB070521: Gemini Observations
  3. GROND upper limits of GRB 070521
  4. GRB 070521 Milagro GeV/TeV Observations
  5. GRB 070521, Swift-BAT refined analysis
  6. GRB 070520B: Swift-XRT refined analysis
  7. GRB 070521: optical limit by Pi of the Sky
  8. GRB070521 - SDSS Pre-Burst Observations
  9. GRB 070520B, Swift-BAT refined analysis
  10. GRB 070520A, Swift-BAT refined analysis
  11. GRB 070520A: Swift-XRT refined analysis
  12. GRB 070518: Swift-XRT refined analysis
  13. GRB070518: UVOT refined analysis
  14. GRB 070518, Swift-BAT refined analysis
  15. GRB 070518: Swift detection of a burst with optical afterglow
  16. GRB070517: Swift-XRT Refined Analysis
  17. GRB 070517, Swift-BAT refined analysis
  18. GRB 070517: Optical search
  19. GRB 070517: Swift detection of a burst
  20. GRB 070512: IPN localization and Konus spectrum of a bright burst
  21. GRB070419A: optical observations
  22. Konus-Wind and Konus-A observation of GRB 070508
  23. GRB 070510: Swift detection of a possible burst
  24. GRB070509: Swift-XRT Refined Analysis
  25. GRB 070509, Swift-BAT refined analysis
  26. GRB 070508: Suzaku/WAM observation of the prompt emission
  27. GRB070508: Swift/UVOT Observations
  28. GRB 070508, Swift-BAT refined analysis
  29. GRB 070508: Swift detection of an intense burst with an optical counterpart
  30. GRB070506: Swift/UVOT Observations
  31. GRB070506: Swift XRT refined analysis
  32. GRB 070506, Swift-BAT Refined Analysis
  33. GRB 070506: Swift detection of a burst with optical afterglow
  34. GRB 070429B, Swift-BAT refined analysis
  35. GRB 070429A, Swift-BAT refined analysis
  36. GRB 070429A: optical and NIR observations
  37. GRB 070429B: Swift XRT refined analysis
  38. GRB 070427, Swift-BAT Refined Analysis
  39. GRB 070411: Late-time Keck imaging
  40. GRB070419B: Suzaku WAM observation of the prompt emission
  41. GRB 070420, SMARTS optical/IR afterglow observations
  42. GRB 070411, deep LBT photometry
  43. Konus-Wind observation of GRB 070420
  44. GRB 070411: break in the optical light curve
  45. GRB 070420 Swift-BAT Refined Analysis
  46. GRB 070420: optical rebrightening observed at Mt. John
  47. GRB070420: Swift UVOT continuing observations
  48. GRB 070420: TAROT La Silla observatory optical observations
  49. GRB 070420: Swift detection of a burst with optical afterglow
  50. GRB 070419A: MITSuME Okayama Observations
  51. GRB 070419A: Early Super-LOTIS Observations
  52. GRB 070419B, Swift-BAT refined analysis
  53. GRB 070419A Swift-BAT Refined Analysis
  54. GRB 070419A, Optical observations
  55. GRB070419 - SDSS Pre-Burst Observations
  56. GRB 070419B optical afterglow candidate
  57. GRB 070419B: optical afterglow candidate
  58. GRB070419A, optical observation
  59. GRB 070406: Swift XRT refined analysis
  60. GRB 070412, Swift-BAT refined analysis
  61. GRB 070412: Gemini/GMOS afterglow candidate
  62. GRB 070411, Swift-BAT refined analysis
  63. GRB 070411 : Liverpool Telescope Observations
  64. GRB 070411: Swift detection of a burst with optical afterglow
  65. Suzaku ToO observation of SGR 1806-20
  66. GRB 070406, Swift-BAT refined analysis
  67. GRB 070406: further analysis of NOT images.
  68. Short GRB 070406 - Possible Bright Host Galaxy
  69. GRB 070406: Optical candidate
  70. GRB 070402: Suzaku WAM observation of the prompt emission
  71. GRB 070328: Suzaku WAM observation of the prompt emission
  72. GRB 070330, Swift-BAT refined analysis
  73. GRB 070330: Swift detection of a burst
  74. long burst from SGR 1806-20 detected on March 26
  75. GRB 070328: Swift/XRT Refined Analysis
  76. GRB 070328, Swift-BAT refined analysis
  77. Short-Hard GRB 070209: PROMPT Observations
  78. GRB070318: Swift UVOT continuing observations
  79. GRB 070318: Swift/UVOT Continued Observations
  80. GRB 070318, Swift-BAT refined analysis
  81. GRB 070318: Swift detection of a burst with an optical afterglow
  82. GRB 070311: Late Central Engine Activity Optical Flare??
  83. GRB 070311: SARA upper limit
  84. GRB 070309: variability of the XRT afterglow candidate
  85. GRB 070311: MITSuME Okayama Optical Observation
  86. GRB 070311: Swift-XRT refined analysis
  87. GRB 070311: a long GRB detected by INTEGRAL
  88. GRB060901: Candidate optical afterglow
  89. GRB 070125: Chandra X-ray Confirmation of Jet Break
  90. GRB 070306, optical observation
  91. GRB 070309: A long GRB detected by INTEGRAL
  92. GRB 070125: X-ray light curve analysis
  93. GRB 070306: NOT observations
  94. GRB 070306: ART-3 early optical and near infrared constraints
  95. GRB 070306, Swift-BAT refined analysis
  96. GRB 070306: XRT Team Refined Analysis
  97. GRB070306 - SDSS Pre-burst Observations
  98. GRB070227: Swift-XRT refined analysis
  99. GRB 070227, Swift-BAT refined analysis
  100. GRB070224: Swift-XRT Refined Analysis

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