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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"

27604 results found.

  1. GRB 080212, Swift-BAT refined analysis
  2. GRB080212: Optical afterglow candidate observed by MITSuME Telescope
  3. GRB 080212: GROND detects afterglow
  4. GRB 080212: optical observations
  5. GRB 080212: Swift-XRT Team refined analysis
  6. GRB 080210: Keck photometry
  7. GRB 080212: Swift detection of a burst
  8. GRB 080212: DSS/2MASS Galaxy at XRT position
  9. GRB 080210: Swift/UVOT Refined Analysis
  10. GRB 080210, Swift-BAT refined analysis
  11. GRB 080210: Super-LOTIS observations
  12. GRB 080210: Swift-XRT Refined Analysis
  13. GRB 080210: Rapid PROMPT Detections
  14. GRB 080210: GOND detection in all bands and redshift upper limit
  15. GRB080210 - SDSS Pre-Burst Observations
  16. GRB 080210: Swift detection of a burst with optical afterglow
  17. GRB 080210: TAROT La Silla observatory optical detection
  18. GRB 080207: GROND upper limits
  19. GRB 080207, Swift-BAT refined analysis
  20. GRB 080207: Optical limits from Gemini-South
  21. Swift detection of AX J1749.1-2639
  22. GRB 080207: Super-LOTIS observations
  23. GRB 080207, Swift-BAT refined analysis
  24. Swift Trigger 302777 is not a GRB
  25. GRB080207: RTT150 Optical Observations
  26. GRB080207: Swift/UVOT refined analysis
  27. GRB 080207: TAROT Calern observatory optical observations
  28. GRB 080207: Swift detection of a burst
  29. GRB 080205 optical upper limit
  30. GRB 080205, Swift-BAT refined analysis
  31. IPN localization of very hard GRB 080204
  32. GRB 080205: Swift XRT refined analysis
  33. GRB 080205: OA evolution from KAIT observations
  34. GRB 080205: Swift/UVOT observations
  35. GRB 080205: KAIT OA detection
  36. GRB 080205: Swift detection of a burst
  37. Swift-BAT Trigger #302454, correction of GCN notice, update on AX J1749.1-2639
  38. GRB 080130: Swift-BAT refined analysis
  39. GRB 080129: Swift/UVOT Refined Upper Limits
  40. GRB 080130(?): Swift XRT observation
  41. GRB 080130?: Detection of a possible burst by BATSS
  42. GRB 080129: Swift-XRT refined analysis
  43. GRB 080129: KAIT optical limits
  44. GRB 080123: Early afterglow detection with BATSS (BAT Slew Survey)
  45. GRB 080129: optical limit by Pi of the Sky
  46. GRB 080129, Swift-BAT refined analysis
  47. GRB 080129: TAROT La Silla observatory optical observations
  48. GRB 080129: Swift XRT position
  49. GRB 080129 (?): UVOT Upper Limits
  50. GRB 080129 (?): Swift detection of a possible burst
  51. A new website of high-level data products for Swift GRBs
  52. GRB 080121: Upper limit on X-ray afterglow
  53. GRB 080123 : Suzaku WAM observation of the prompt emission
  54. Swift trigger(=301779) is not a GRB
  55. GRB 080121: Swift/UVOT upper limits
  56. Two non-burst Swift SubThreshold triggers
  57. IPN triangulation of GRB080122
  58. GRB 080121: Nearby SDSS galaxies
  59. GRB 080121: Swift-BAT detection of a very weak, short burst
  60. GRB 080123: Swift/UVOT refined analysis
  61. GRB 080123, Swift-BAT refined analysis
  62. GRB 080123: Swift detection of a short burst
  63. GRB 080120: Swift-XRT refined analysis
  64. UVOT detection of GRB080120
  65. Swift UVOT Monitoring of the SN 2008D Brightening (Transient in NGC 2770)
  66. Gemini-South observations of XRF 080109 / SN 2008D
  67. Swift observations of the X-ray transient in NGC 2770 (aka SN2008D)
  68. GRB 071227: Suzaku WAM observation of the prompt emission
  69. Further Swift-BAT analysis of GRB 071227
  70. Konus-Wind observation of GRB 071227
  71. GRB 071227: Swift-XRT refined analysis
  72. GRB071227: Swift/UVOT refined analysis
  73. Swift-BAT refined analysis of short GRB 071227
  74. GRB 071227: Swift detection of a burst
  75. GRB 070429B: Possible UVOT Detection of an Optical Afterglow
  76. Swift-BAT trigger 298308 is not a GRB
  77. GRB 071208?: Swift detection of a possible burst
  78. GRB 071129, Swift-BAT refined analysis
  79. GRB 071129: Swift detection of a burst
  80. Disregard the "GRB 071126" position
  81. GRB071122: Swift/UVOT Observations
  82. GRB 071122, Swift-BAT refined analysis
  83. GRB 071122 Swift-XRT refined analysis
  84. GRB 071122: ROTSE-III Optical Limits
  85. GRB 071122: Swift detection of a burst
  86. GRB071118 MITSuME OAO optical observation
  87. Swift/UVOT observations of GRB071118
  88. GRB 071117: Swift-XRT revised position
  89. Konus-Wind and Konus-A observations of GRB 071117
  90. Swift XRT follow-up observations of GRB071008
  91. Swift/UVOT upper limits for GRB 071117
  92. GRB071118: Swift XRT refined analysis
  93. GRB 071118, Swift-BAT refined analysis
  94. GRB 071117: TAROT La Silla observatory optical observations
  95. GRB 071112B: Gemini Image Differencing
  96. GRB 071118: Swift detection of a burst
  97. GRB 071117: Swift-XRT refined analysis
  98. GRB 071117, Swift-BAT refined analysis
  99. VLT FORS2 observations of short hard GRB071112B
  100. GRB 071117: Swift/XRT position

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