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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"

27598 results found.

  1. GRB 080212: Swift detection of a burst
  2. GRB 080212: DSS/2MASS Galaxy at XRT position
  3. GRB 080210: Swift/UVOT Refined Analysis
  4. GRB 080210, Swift-BAT refined analysis
  5. GRB 080210: Super-LOTIS observations
  6. GRB 080210: Swift-XRT Refined Analysis
  7. GRB 080210: Rapid PROMPT Detections
  8. GRB 080210: GOND detection in all bands and redshift upper limit
  9. GRB080210 - SDSS Pre-Burst Observations
  10. GRB 080210: Swift detection of a burst with optical afterglow
  11. GRB 080210: TAROT La Silla observatory optical detection
  12. GRB 080207: GROND upper limits
  13. GRB 080207, Swift-BAT refined analysis
  14. GRB 080207: Optical limits from Gemini-South
  15. Swift detection of AX J1749.1-2639
  16. GRB 080207: Super-LOTIS observations
  17. GRB 080207, Swift-BAT refined analysis
  18. Swift Trigger 302777 is not a GRB
  19. GRB080207: RTT150 Optical Observations
  20. GRB080207: Swift/UVOT refined analysis
  21. GRB 080207: TAROT Calern observatory optical observations
  22. GRB 080207: Swift detection of a burst
  23. GRB 080205 optical upper limit
  24. GRB 080205, Swift-BAT refined analysis
  25. IPN localization of very hard GRB 080204
  26. GRB 080205: Swift XRT refined analysis
  27. GRB 080205: OA evolution from KAIT observations
  28. GRB 080205: Swift/UVOT observations
  29. GRB 080205: KAIT OA detection
  30. GRB 080205: Swift detection of a burst
  31. Swift-BAT Trigger #302454, correction of GCN notice, update on AX J1749.1-2639
  32. GRB 080130: Swift-BAT refined analysis
  33. GRB 080129: Swift/UVOT Refined Upper Limits
  34. GRB 080130(?): Swift XRT observation
  35. GRB 080130?: Detection of a possible burst by BATSS
  36. GRB 080129: Swift-XRT refined analysis
  37. GRB 080129: KAIT optical limits
  38. GRB 080123: Early afterglow detection with BATSS (BAT Slew Survey)
  39. GRB 080129: optical limit by Pi of the Sky
  40. GRB 080129, Swift-BAT refined analysis
  41. GRB 080129: TAROT La Silla observatory optical observations
  42. GRB 080129: Swift XRT position
  43. GRB 080129 (?): UVOT Upper Limits
  44. GRB 080129 (?): Swift detection of a possible burst
  45. A new website of high-level data products for Swift GRBs
  46. GRB 080121: Upper limit on X-ray afterglow
  47. GRB 080123 : Suzaku WAM observation of the prompt emission
  48. Swift trigger(=301779) is not a GRB
  49. GRB 080121: Swift/UVOT upper limits
  50. Two non-burst Swift SubThreshold triggers
  51. IPN triangulation of GRB080122
  52. GRB 080121: Nearby SDSS galaxies
  53. GRB 080121: Swift-BAT detection of a very weak, short burst
  54. GRB 080123: Swift/UVOT refined analysis
  55. GRB 080123, Swift-BAT refined analysis
  56. GRB 080123: Swift detection of a short burst
  57. GRB 080120: Swift-XRT refined analysis
  58. UVOT detection of GRB080120
  59. Swift UVOT Monitoring of the SN 2008D Brightening (Transient in NGC 2770)
  60. Gemini-South observations of XRF 080109 / SN 2008D
  61. Swift observations of the X-ray transient in NGC 2770 (aka SN2008D)
  62. GRB 071227: Suzaku WAM observation of the prompt emission
  63. Further Swift-BAT analysis of GRB 071227
  64. Konus-Wind observation of GRB 071227
  65. GRB 071227: Swift-XRT refined analysis
  66. GRB071227: Swift/UVOT refined analysis
  67. Swift-BAT refined analysis of short GRB 071227
  68. GRB 071227: Swift detection of a burst
  69. GRB 070429B: Possible UVOT Detection of an Optical Afterglow
  70. Swift-BAT trigger 298308 is not a GRB
  71. GRB 071208?: Swift detection of a possible burst
  72. GRB 071129, Swift-BAT refined analysis
  73. GRB 071129: Swift detection of a burst
  74. Disregard the "GRB 071126" position
  75. GRB071122: Swift/UVOT Observations
  76. GRB 071122, Swift-BAT refined analysis
  77. GRB 071122 Swift-XRT refined analysis
  78. GRB 071122: ROTSE-III Optical Limits
  79. GRB 071122: Swift detection of a burst
  80. GRB071118 MITSuME OAO optical observation
  81. Swift/UVOT observations of GRB071118
  82. GRB 071117: Swift-XRT revised position
  83. Konus-Wind and Konus-A observations of GRB 071117
  84. Swift XRT follow-up observations of GRB071008
  85. Swift/UVOT upper limits for GRB 071117
  86. GRB071118: Swift XRT refined analysis
  87. GRB 071118, Swift-BAT refined analysis
  88. GRB 071117: TAROT La Silla observatory optical observations
  89. GRB 071112B: Gemini Image Differencing
  90. GRB 071118: Swift detection of a burst
  91. GRB 071117: Swift-XRT refined analysis
  92. GRB 071117, Swift-BAT refined analysis
  93. VLT FORS2 observations of short hard GRB071112B
  94. GRB 071117: Swift/XRT position
  95. GRB 071117: Initial Swift/UVOT observations
  96. GRB 071117: Swift detection of a bright burst
  97. Swift detection of MXB 0656-072
  98. ATCA radio observations of short hard burst GRB 071112B
  99. Correction to the Swift-BAT Transient Identification (trigger=296683)
  100. GRB 071112C: optical observation

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