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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"

21469 results found.

  1. GRB 080123: Swift/UVOT refined analysis
  2. GRB 080123, Swift-BAT refined analysis
  3. GRB 080123: Enhanced Swift-XRT position
  4. GRB 080123: Swift detection of a short burst
  5. GRB 080120: GROND confirmation of the optical afterglow
  6. VLA radio upper limit on GRB 080120
  7. GRB 080120: Swift-XRT refined analysis
  8. UVOT detection of GRB080120
  9. GRB 080120: GROND detection
  10. GRB080120: Swift XRT position
  11. Swift UVOT Monitoring of the SN 2008D Brightening (Transient in NGC 2770)
  12. optical observations, XRT in NGC 2770
  13. Swift observations of the X-ray transient in NGC 2770 (aka SN2008D)
  14. XRB 080109/SN 2008D: Early decline in brightness and change in colors
  15. XRB 080109/SN 2008D:PAIRITEL NIR observations and t_0 from Swift
  16. XRF 080109 in NGC2770: Detectable Superluminal Motion
  17. XRF in NGC 2770: Search for X-ray periodicity
  18. Refined Swift-XRT analysis of the transient in NGC 2770
  19. Refined Swift UVOT Analysis of SN 2008D (Transient in NGC 2770)
  20. Swift UVOT Observations of the X-ray transient in NGC 2770
  21. Early OT detection of XRF in NGC 2770 in Asiago frames
  22. Bright X-ray Transient in NGC 2770 - A low-luminosity XRF?
  23. GRB 071227: Suzaku WAM observation of the prompt emission
  24. GRB 071227: optical afterglow
  25. Further Swift-BAT analysis of GRB 071227
  26. Konus-Wind observation of GRB 071227
  27. GRB 071227: Swift-XRT refined analysis
  28. GRB 071227: VLT probable redshift of the candidate host galaxy
  29. GRB 071227: Magellan observations
  30. GRB071227: Swift/UVOT refined analysis
  31. GRB 071227: REM NIR and Optical observations
  32. Swift-BAT refined analysis of short GRB 071227
  33. GRB 071227: Swift detection of a burst
  34. GRB 070429B: Possible UVOT Detection of an Optical Afterglow
  35. Swift-BAT trigger 298308 is not a GRB
  36. GRB 071208?: Swift detection of a possible burst
  37. GRB 071129, Swift-BAT refined analysis
  38. GRB 071129: Swift detection of a burst
  39. Disregard the "GRB 071126" position
  40. GRB 071126: Enhanced Swift-XRT position
  41. VLA radio detection of GRB 071122
  42. GRB071122: Swift/UVOT Observations
  43. GRB071104: NIR Afterglow Candidate at TNG
  44. GRB 071122, Swift-BAT refined analysis
  45. GRB 071122 Swift XRT position update sent in error.
  46. GRB 071122 Swift-XRT refined analysis
  47. GRB 071122: P60 Optical Afterglow Candidate
  48. GRB 071122: ROTSE-III Optical Limits
  49. GRB 071122: Swift detection of a burst
  50. GRB071118 MITSuME OAO optical observation
  51. GRB 071117: VLT observations and probable redshift
  52. Swift/UVOT observations of GRB071118
  53. GRB 071117: Swift-XRT revised position
  54. Konus-Wind and Konus-A observations of GRB 071117
  55. Swift XRT follow-up observations of GRB071008
  56. Swift/UVOT upper limits for GRB 071117
  57. GRB071118: Swift XRT refined analysis
  58. GRB 071117: Gemini Optical Afterglow Discovery
  59. GRB 071118, Swift-BAT refined analysis
  60. GRB 071117: TAROT La Silla observatory optical observations
  61. GRB 071118: Swift detection of a burst
  62. GRB 071117: Gemini Observations
  63. GRB 071117: Las Campanas optical observations
  64. GRB 071117: Swift-XRT refined analysis
  65. GRB 071117, Swift-BAT refined analysis
  66. GRB 071117: Swift/XRT position
  67. GRB 071117: Initial Swift/UVOT observations
  68. GRB 071117: Swift detection of a bright burst
  69. Swift detection of MXB 0656-072
  70. VLA radio upper limit on GRB 071112C
  71. ATCA radio observations of short hard burst GRB 071112B
  72. Correction to the Swift-BAT Transient Identification (trigger=296683)
  73. GRB 071112C: Swift-BAT refined analysis
  74. GRB 071112C: Swift/UVOT observations
  75. GRB 071112C: Swift XRT refined analysis
  76. Swift UVOT upper limits of GRB071112B
  77. GRB 071112B: Gemini Optical Imaging
  78. GRB 071112B: Swift-XRT preliminary analysis
  79. GRB 071112B, Swift-BAT partial refined analysis of the SHB
  80. GRB 071112C: Palomar Pre-Imaging
  81. Swift-BAT trigger 296491 is not a GRB
  82. GRB 071112C: TAROT Calern observatory optical observations
  83. Swift XRT follow-up observations of GRB071028B
  84. GRB 071112C: ROTSE-III Confirmation of Optical Counterpart
  85. GRB 071112B: ROTSE-III Rapid Optical Limits
  86. GRB 071112C: Swift detection of a burst with an optical counterpart
  87. GRB 071112B: Swift detection of a short hard burst
  88. GRB 071112: Swift detection of a possible burst
  89. GRB071109: Super-LOTIS observations
  90. VLA IInd observation of INTEGRAL burst GRB 071109
  91. Swift/UVOT initial analysis of GRB071109
  92. GRB 071109: further Swift-XRT analysis
  93. No radio detection at Swift-XRT position
  94. GRB 071109: Swift-XRT possible X-ray counterpart
  95. GRB 071104: Swift-XRT Team Refined Analysis
  96. GRB 071104: Possible Swift UVOT Afterglow Candidate
  97. GRB 071104: Swift-XRT position
  98. Swift XRT and UVOT observations of GRB071028B
  99. GRB 071101, Swift-BAT refined analysis
  100. GRB 071101: Swift-XRT Team refined analysis

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