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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"

19615 results found.

  1. SNe 2008D and 2007uy: Chandra Detections
  2. GRB 080121: Enhanced Swift-XRT position
  3. Two non-burst Swift SubThreshold triggers
  4. IPN triangulation of GRB080122
  5. GRB 080121: Nearby SDSS galaxies
  6. GRB 080121: Swift-BAT detection of a very weak, short burst
  7. GRB 080123: Swift-XRT refined analysis
  8. GRB 080123: Swift/UVOT refined analysis
  9. GRB 080123, Swift-BAT refined analysis
  10. GRB 080123: Enhanced Swift-XRT position
  11. GRB 080123: Swift detection of a short burst
  12. VLA radio upper limit on GRB 080120
  13. GRB 080120: Swift-XRT refined analysis
  14. UVOT detection of GRB080120
  15. GRB 080120: GROND detection
  16. GRB080120: Swift XRT position
  17. Swift UVOT Monitoring of the SN 2008D Brightening (Transient in NGC 2770)
  18. Swift observations of the X-ray transient in NGC 2770 (aka SN2008D)
  19. XRB 080109/SN 2008D: Early decline in brightness and change in colors
  20. XRB 080109/SN 2008D:PAIRITEL NIR observations and t_0 from Swift
  21. XRF 080109 in NGC2770: Detectable Superluminal Motion
  22. XRF in NGC 2770: Search for X-ray periodicity
  23. Refined Swift-XRT analysis of the transient in NGC 2770
  24. Refined Swift UVOT Analysis of SN 2008D (Transient in NGC 2770)
  25. Swift UVOT Observations of the X-ray transient in NGC 2770
  26. Early OT detection of XRF in NGC 2770 in Asiago frames
  27. Bright X-ray Transient in NGC 2770 - A low-luminosity XRF?
  28. GRB 071227: Suzaku WAM observation of the prompt emission
  29. Further Swift-BAT analysis of GRB 071227
  30. Konus-Wind observation of GRB 071227
  31. GRB 071227: Swift-XRT refined analysis
  32. GRB071227: Swift/UVOT refined analysis
  33. Swift-BAT refined analysis of short GRB 071227
  34. GRB 071227: Swift detection of a burst
  35. GRB 070429B: Possible UVOT Detection of an Optical Afterglow
  36. Swift-BAT trigger 298308 is not a GRB
  37. GRB 071208?: Swift detection of a possible burst
  38. GRB 071129, Swift-BAT refined analysis
  39. GRB 071129: Swift detection of a burst
  40. GRB 071126: Enhanced Swift-XRT position
  41. VLA radio detection of GRB 071122
  42. GRB071122: Swift/UVOT Observations
  43. GRB 071122, Swift-BAT refined analysis
  44. GRB 071122 Swift XRT position update sent in error.
  45. GRB 071122 Swift-XRT refined analysis
  46. GRB 071122: ROTSE-III Optical Limits
  47. GRB 071122: Swift detection of a burst
  48. Swift/UVOT observations of GRB071118
  49. GRB 071117: Swift-XRT revised position
  50. Konus-Wind and Konus-A observations of GRB 071117
  51. Swift XRT follow-up observations of GRB071008
  52. Swift/UVOT upper limits for GRB 071117
  53. GRB071118: Swift XRT refined analysis
  54. GRB 071118, Swift-BAT refined analysis
  55. GRB 071117: TAROT La Silla observatory optical observations
  56. GRB 071118: Swift detection of a burst
  57. GRB 071117: Swift-XRT refined analysis
  58. GRB 071117, Swift-BAT refined analysis
  59. GRB 071117: Swift/XRT position
  60. GRB 071117: Initial Swift/UVOT observations
  61. GRB 071117: Swift detection of a bright burst
  62. Swift detection of MXB 0656-072
  63. VLA radio upper limit on GRB 071112C
  64. ATCA radio observations of short hard burst GRB 071112B
  65. Correction to the Swift-BAT Transient Identification (trigger=296683)
  66. GRB 071112C: Swift-BAT refined analysis
  67. GRB 071112C: Swift/UVOT observations
  68. GRB 071112C: Swift XRT refined analysis
  69. Swift UVOT upper limits of GRB071112B
  70. GRB 071112B: Swift-XRT preliminary analysis
  71. GRB 071112B, Swift-BAT partial refined analysis of the SHB
  72. Swift-BAT trigger 296491 is not a GRB
  73. GRB 071112C: TAROT Calern observatory optical observations
  74. Swift XRT follow-up observations of GRB071028B
  75. GRB 071112C: ROTSE-III Confirmation of Optical Counterpart
  76. GRB 071112B: ROTSE-III Rapid Optical Limits
  77. GRB 071112C: Swift detection of a burst with an optical counterpart
  78. GRB 071112B: Swift detection of a short hard burst
  79. GRB 071112: Swift detection of a possible burst
  80. VLA IInd observation of INTEGRAL burst GRB 071109
  81. Swift/UVOT initial analysis of GRB071109
  82. GRB 071109: further Swift-XRT analysis
  83. No radio detection at Swift-XRT position
  84. GRB 071109: Swift-XRT possible X-ray counterpart
  85. GRB 071104: Swift-XRT Team Refined Analysis
  86. GRB 071104: Possible Swift UVOT Afterglow Candidate
  87. GRB 071104: Swift-XRT position
  88. Swift XRT and UVOT observations of GRB071028B
  89. GRB 071101, Swift-BAT refined analysis
  90. GRB 071101: Swift-XRT Team refined analysis
  91. GRB 071101: TAROT Calern observatory optical observations
  92. GRB 071101: Swift XRT position
  93. GRB 071101: BOOTES-2 prompt optical observations
  94. GRB 071101: a nearby galaxy
  95. GRB 071101: Swift detection of a burst
  96. GRB 071031, Swift-BAT refined analysis
  97. GRB 071031: Swift/UVOT detection of afterglow
  98. GRB 071031: Swift-XRT Team refined analysis
  99. GRB 071031: Swift detection of a burst with an optical counterpart
  100. GRB 071028B Swift-BAT detection of a burst

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