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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').
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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"

38679 results found.

  1. Update on Swift Status
  2. GRB 070920B: ROTSE-III Early Optical Limits
  3. GRB 070925: a long GRB detected by INTEGRAL
  4. Recent SGR1806-20 Activity
  5. GRB 070920B: XRT observations
  6. GRB 070923: Swift detection of a short hard burst
  7. GRB 070917: Suzaku/WAM observation of the prompt emission
  8. INTEGRAL ToO observations of SGR1806-20
  9. GRB 070920b, SMARTS optical observation
  10. GRB 070917: Confirmation of the X-ray afterglow
  11. GRB 070920b: LCO optical observations
  12. GRB 070911: Swift/BAT and Suzaku/WAM joint spectral analysis
  13. GRB 070920B: Swift detection of a burst
  14. GRB 070920: Swift detection of a burst
  15. SGR1806-20: Swift-BAT detection of enhanced activity
  16. GRB070917: Confirmation of optical afterglow
  17. GRB920925C: search for host galaxy
  18. GRB070917: optical observations
  19. GRB 070917: P60 Observations
  20. Konus-Wind observation of GRB 070917
  21. Swift Status and XRT Calibration Uncertainties
  22. GRB 070917: Swift-XRT observations
  23. GRB 070917: KAIT optical limits
  24. GRB 070917: MITSuME Akeno Ic upper limit
  25. GRB 070917: R band observations
  26. GRB 070917: Swift detection of a bright burst
  27. GRB 070911: Suzaku WAM observation of the prompt emission
  28. GRB 070913: Swift-XRT detection of the possible X-ray afterglow
  29. GRB 070809: The Swift evidence for the SHB nature of this burst
  30. GRB 070913: Afterglow candidate detected by TAROT La Silla observatory
  31. GRB 070913: Corrected BAT position
  32. GRB 070913: SMARTS optical/IR observations
  33. GRB 070913: Swift detection of a burst
  34. Swift-BAT Notices back to autonomous real-time distribution
  35. GRB 070911: PAIRITEL IR Observations
  36. GRB 070911: Swift XRT refined analysis
  37. GRB 070911: Swift detection of a burst
  38. IPN search for a GRB associated with TAROT transient on August 31
  39. Intense burst from SGR 1806-20 detected on September 7
  40. GRB 070809: Confirmation of optical transient
  41. Observations of possible TAROT GRB transient near IC 4779
  42. Candidate Orphan GRB Optical Transient in IC 4779
  43. Las Campanas observations of possible TAROT GRB transient near IC
  44. Orphan GRB candidate in IC 4779 at TAROT La Silla observatory
  45. Konus-Wind observation of GRB 070824
  46. GRB 070824 - Combined SuperAGILE/IPN Localization
  47. Konus-Wind observation of very bright GRB 070821
  48. GRB 070731: Swift/UVOT Upper Limit
  49. IPN Localization of GRB 070821 (long, very bright)
  50. GRB 070805: UVOT afterglow candidate retraction
  51. GRB070810b: optical candidate
  52. GRB 070810A: ROTSE-III Refined Analysis
  53. Swift observatory off line
  54. GRB 061110A: redshift confirmed
  55. GRB 070810B : Faulkes Telescope South Observations
  56. GRB 070810A: Continued Keck Imaging
  57. GRB 070810B: Keck spectroscopy of possible host galaxies
  58. GRB070810B: Swift/UVOT Upper Limits
  59. GRB 070810B: XRT refined analysis
  60. GRB 070809: Swift/UVOT Corrected Photometry
  61. Swift Trigger 287421: False trigger due to star tracker loss
  62. GRB 070810B: Xinglong TNT optical Upper Limit
  63. GRB070810B: Optical observations with KANATA
  64. A giant outburst from Cygnus X-1 detected by Konus-Wind and Suzaku-WAM
  65. GRB 070809: Swift/UVOT Upper Limits
  66. GRB 070810B: Swift detection of a short burst
  67. VLA upper limit on the short hard burst GRB 070729
  68. GRB 070810: Keck redshift and photometry
  69. No radio detection in superAGILE burst 070724B
  70. GRB 070809: Keck Imaging
  71. GRB 070810: Swift-XRT Team Refined Analysis
  72. GRB 070809: Swift-XRT refined analysis
  73. GRB 070810: enhanced Swift-XRT position
  74. GRB 070810: Swift/UVOT Optical Counterpart
  75. GRB 070810: ROTSE-III Detection of Optical Counterpart
  76. GRB 070810: Swift detection of a burst
  77. GRB 070808: Swift/UVOT upper limits
  78. GRB 070809: ROTSE-III Optical Limits
  79. GRB 070809: Swift detection of a short burst
  80. GRB 070808 : Faulkes Telescope South Observations
  81. GCN Swift XRT update position notices and enhanced position circulars
  82. GRB 070808: Swift XRT refined analysis
  83. GRB 070808: Xinglong TNT optical Upper Limit
  84. GRB070808: Optical observations with KANATA
  85. GRB070808 - SDSS Pre-Burst Observations
  86. GRB 070808: ROTSE-III Optical Limits
  87. GRB 070808: Swift detection of a burst
  88. GRB070805 XRT and UVOT afterglow candidate
  89. Swift trigger on 4U 1700-377 while star tracker loss-of-lock
  90. GRB070612A: Radio upper limit from GMRT
  91. Swift/UVOT observations of GRB070805
  92. GRB 070805: Swift XRT initial analysis.
  93. GRB 070805: Swift/UVOT initial analysis
  94. GRB 070805: Swift detection of a burst
  95. UVOT observations of SAXJ1810.8-2609
  96. Swift detection of a outburst from SAX J1810.8-2609
  97. VLA non-detection of GRB 070721B
  98. GRB 070802: REM optical observations
  99. GRB 070724B: Swift-XRT afterglow confirmation
  100. GRB 070802: Swift-XRT refined analysis

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