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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. 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').
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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.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

11762 results found.

  1. GRB070704: FAVOR optical observations
  2. Konus-Wind observation of GRB 070626
  3. Swift/UVOT Observations of GRB070704
  4. GRB 070704: Correction to GCN Circ 6594
  5. GRB 070704: Swift detection of a burst
  6. GRB 070626: IPN localization and Konus spectrum of a bright long burst
  7. GRB 070628, Swift-BAT refined analysis
  8. GRB 070628: Watcher Observations
  9. Swift UVOT Observations of GRB 070628
  10. GRB 070628: Swift detection of a possible burst
  11. GRB 070612A: Second Epoch WSRT Radio Observations
  12. GRB 070621: Swift-BAT refined analysis
  13. GRB 070621: ROTSE-III Prompt Optical Limits
  14. GRB 070621: Swift detection of a burst
  15. Swift/UVOT observations of GRB070616
  16. GRB 070615: A long GRB detected by INTEGRAL
  17. SWIFT J195509.6+261406 (GRB 070610): further observations
  18. SWIFT J195509.6+261406 / GRB 070610: OPTIMA-Burst observations
  19. GRB 070612A, Swift-BAT refined analysis
  20. GRB 070612A: SARA detection of possible OT
  21. GRB 070612B: Swift detection of a burst
  22. GRB 070610: OPTIMA-Burst detection of continued strong flaring activity
  23. GRB 070610: Watcher Observations
  24. GRB 070611: ROTSE-III Optical Limits
  25. GRB 070610: OPTIMA-Burst high-time-resolution optical observations
  26. GRB 070610, Swift-BAT refined analysis
  27. GRB 070610: Swift detection of a burst
  28. GRB 070419A, deep LBT photometry and possible supernova detection
  29. GRB070520B: optical observations
  30. GRB070520: optical observation
  31. GRB070518: optical observation
  32. GRB070521: optical observation
  33. Swift/UVOT refined analysis of GRB070531
  34. GRB 070531: Swift-BAT refined analysis
  35. GRB 070531: Swift detection of a burst
  36. Swift/UVOT refined analysis of GRB070529
  37. GRB 070529: MARGE Observations
  38. Konus-Wind observation of GRB 070521
  39. GROND upper limits of GRB 070521
  40. GRB 070520A: SARA upper limit
  41. GRB 070521: SARA upper limit
  42. GRB 070521: optical limit by Pi of the Sky
  43. GRB 070521: Swift detection of a burst
  44. GRB 070520: Xinglong EST optical Upper Limit
  45. GRB 070517: Swift detection of a burst
  46. GRB 070512: IPN localization and Konus spectrum of a bright burst
  47. GRB070419A: optical observations
  48. Konus-Wind and Konus-A observation of GRB 070508
  49. RHESSI Spectrum of GRB070508
  50. GRB 070508: Suzaku/WAM observation of the prompt emission
  51. GRB 070509: ROTSE-III Optical Limits
  52. GRB 070508, Swift-BAT refined analysis
  53. GRB 070508: Optical observation limiting magnitude
  54. GRB 070508: Optical afterglow detection
  55. GRB 070508: Swift detection of an intense burst with an optical counterpart
  56. GRB 070429A: Swift XRT refined analysis
  57. GRB 070429B: Swift XRT refined analysis
  58. GRB 070429B: ROTSE-III Optical Limits
  59. GRB 070429: ROTSE-III Optical Limits
  60. GRB 070427, Swift-BAT Refined Analysis
  61. GRB 070420, SMARTS optical/IR afterglow observations
  62. Konus-Wind observation of GRB 070420
  63. GRB070420: Swift UVOT continuing observations
  64. GRB 070420: NIR and optical afterglow confirmed
  65. GRB 070419A: Early Super-LOTIS Observations
  66. GRB 070419A: SARA observations
  67. GRB 070419B optical afterglow candidate
  68. GRB 070419B: optical afterglow candidate
  69. GRB 070419A: ROTSE-III Optical Limits
  70. GRB 070419: Swift detection of a burst
  71. GRB 070318, SMARTS optical/IR afterglow observations
  72. GRB 070411: Swift/UVOT observations
  73. GRB 070411: Optical photometry at Crni Vrh
  74. GRB 070411, Swift-BAT refined analysis
  75. GRB 070411 : Liverpool Telescope Observations
  76. GRB 070411: Optical observations at Crni Vrh
  77. GRB 070411: ROTSE-III Detection of Optical Counterpart
  78. GRB 070411: Tautenburg RRM Afterglow Confirmation
  79. GRB 070411: Swift detection of a burst with optical afterglow
  80. GRB 070406: Swift XRT team further analysis
  81. Suzaku ToO observation of SGR 1806-20
  82. GRB 070406: Gemini South Imaging and XRT analysis
  83. GRB 070406: SARA upper limit
  84. GRB 070406: Xinglong TNT optical Upper Limit
  85. Konus-Wind and Konus-A observations of GRB 070402
  86. IPN triangulation of GRB070402
  87. INTEGRAL ToO Observation of SGR1806-20
  88. Konus-Wind observation of GRB 070328
  89. long burst from SGR 1806-20 detected on March 26
  90. GRB 070328: Swift/XRT Refined Analysis
  91. GRB 070328 : Suzaku ToO follow up starts
  92. Short-Hard GRB 070209: PROMPT Observations
  93. GRB 070311: a long GRB detected by INTEGRAL
  94. GRB 070125: Chandra X-ray Confirmation of Jet Break
  95. GRB 070309: A long GRB detected by INTEGRAL
  96. GRB 070306: XRT Team Refined Analysis
  97. GRB 070227: optical observations
  98. GRB 070227: optical observations
  99. GRB 070224: SARA upper limit
  100. GRB 070224, Swift-BAT refined analysis

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