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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').
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.

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

10818 results found.

  1. Konus-Wind observation of GRB 070707
  2. GRB 070707: VLT observations
  3. GRB070704: FAVOR optical observations
  4. Konus-Wind observation of GRB 070626
  5. Swift/UVOT Observations of GRB070704
  6. GRB 070704: Correction to GCN Circ 6594
  7. GRB 070704: Swift detection of a burst
  8. GRB 070626: IPN localization and Konus spectrum of a bright long burst
  9. GRB 070628, Swift-BAT refined analysis
  10. GRB 070628: Watcher Observations
  11. Swift UVOT Observations of GRB 070628
  12. GRB 070628: Swift detection of a possible burst
  13. GRB 070612A: Second Epoch WSRT Radio Observations
  14. GRB 070621: Swift-BAT refined analysis
  15. GRB 070621: ROTSE-III Prompt Optical Limits
  16. GRB 070621: Swift detection of a burst
  17. Swift/UVOT observations of GRB070616
  18. GRB 070615: A long GRB detected by INTEGRAL
  19. SWIFT J195509.6+261406 (GRB 070610): further observations
  20. SWIFT J195509.6+261406 / GRB 070610: OPTIMA-Burst observations
  21. GRB 070612A, Swift-BAT refined analysis
  22. GRB 070612A: SARA detection of possible OT
  23. GRB 070612B: Swift detection of a burst
  24. GRB 070610: OPTIMA-Burst detection of continued strong flaring activity
  25. GRB 070610: Watcher Observations
  26. GRB 070611: ROTSE-III Optical Limits
  27. GRB 070610: OPTIMA-Burst high-time-resolution optical observations
  28. GRB 070610, Swift-BAT refined analysis
  29. GRB 070610: Swift detection of a burst
  30. GRB 070419A, deep LBT photometry and possible supernova detection
  31. GRB070520B: optical observations
  32. GRB070520: optical observation
  33. GRB070518: optical observation
  34. GRB070521: optical observation
  35. Swift/UVOT refined analysis of GRB070531
  36. GRB 070531: Swift-BAT refined analysis
  37. GRB 070531: Swift detection of a burst
  38. Swift/UVOT refined analysis of GRB070529
  39. GRB 070529: MARGE Observations
  40. Konus-Wind observation of GRB 070521
  41. GROND upper limits of GRB 070521
  42. GRB 070520A: SARA upper limit
  43. GRB 070521: SARA upper limit
  44. GRB 070521: optical limit by Pi of the Sky
  45. GRB 070521: Swift detection of a burst
  46. GRB 070520: Xinglong EST optical Upper Limit
  47. GRB 070517: Swift detection of a burst
  48. GRB 070512: IPN localization and Konus spectrum of a bright burst
  49. GRB070419A: optical observations
  50. Konus-Wind and Konus-A observation of GRB 070508
  51. RHESSI Spectrum of GRB070508
  52. GRB 070508: Suzaku/WAM observation of the prompt emission
  53. GRB 070509: ROTSE-III Optical Limits
  54. GRB 070508, Swift-BAT refined analysis
  55. GRB 070508: Optical observation limiting magnitude
  56. GRB 070508: Optical afterglow detection
  57. GRB 070508: Swift detection of an intense burst with an optical counterpart
  58. GRB 070429A: Swift XRT refined analysis
  59. GRB 070429B: Swift XRT refined analysis
  60. GRB 070429B: ROTSE-III Optical Limits
  61. GRB 070429: ROTSE-III Optical Limits
  62. GRB 070427, Swift-BAT Refined Analysis
  63. GRB 070420, SMARTS optical/IR afterglow observations
  64. Konus-Wind observation of GRB 070420
  65. GRB070420: Swift UVOT continuing observations
  66. GRB 070420: NIR and optical afterglow confirmed
  67. GRB 070419A: Early Super-LOTIS Observations
  68. GRB 070419A: SARA observations
  69. GRB 070419B optical afterglow candidate
  70. GRB 070419B: optical afterglow candidate
  71. GRB 070419A: ROTSE-III Optical Limits
  72. GRB 070419: Swift detection of a burst
  73. GRB 070318, SMARTS optical/IR afterglow observations
  74. GRB 070411: Swift/UVOT observations
  75. GRB 070411: Optical photometry at Crni Vrh
  76. GRB 070411, Swift-BAT refined analysis
  77. GRB 070411 : Liverpool Telescope Observations
  78. GRB 070411: Optical observations at Crni Vrh
  79. GRB 070411: ROTSE-III Detection of Optical Counterpart
  80. GRB 070411: Tautenburg RRM Afterglow Confirmation
  81. GRB 070411: Swift detection of a burst with optical afterglow
  82. GRB 070406: Swift XRT team further analysis
  83. Suzaku ToO observation of SGR 1806-20
  84. GRB 070406: Gemini South Imaging and XRT analysis
  85. GRB 070406: SARA upper limit
  86. GRB 070406: Xinglong TNT optical Upper Limit
  87. Konus-Wind and Konus-A observations of GRB 070402
  88. IPN triangulation of GRB070402
  89. INTEGRAL ToO Observation of SGR1806-20
  90. Konus-Wind observation of GRB 070328
  91. long burst from SGR 1806-20 detected on March 26
  92. GRB 070328: Swift/XRT Refined Analysis
  93. GRB 070328 : Suzaku ToO follow up starts
  94. Short-Hard GRB 070209: PROMPT Observations
  95. GRB 070311: a long GRB detected by INTEGRAL
  96. GRB 070125: Chandra X-ray Confirmation of Jet Break
  97. GRB 070309: A long GRB detected by INTEGRAL
  98. GRB 070306: XRT Team Refined Analysis
  99. GRB 070227: optical observations
  100. GRB 070227: optical observations

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