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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"

37677 results found.

  1. GRB 080207: REM NIR observations
  2. GRB 080207: TAROT Calern observatory optical observations
  3. GRB 080207: Swift-XRT Refined Analysis
  4. GRB 080207: Enhanced Swift-XRT position
  5. GRB 080207: Swift detection of a burst
  6. Konus-Wind observation of GRB 080204
  7. GRB 080205 optical upper limit
  8. GRB 080205: MASTER optical observation
  9. GRB 080205: optical observation
  10. VLA radio upper limit on GRB 080205
  11. INT+WFC R-band observations of GRB 080205
  12. GRB 080205, Swift-BAT refined analysis
  13. IPN localization of very hard GRB 080204
  14. GRB 080205: Swift XRT refined analysis
  15. GRB 080205: OA evolution from KAIT observations
  16. GRB 080205: Swift/UVOT observations
  17. GRB 080205: Enhanced Swift-XRT position
  18. GRB 080205: KAIT OA detection
  19. GRB 080205: Swift detection of a burst
  20. GRB 080130: Swift-BAT refined analysis
  21. GRB 080130: further Swift XRT observations confirm fading source
  22. GRB 080129: Swift/UVOT Refined Upper Limits
  23. GRB 080130: REM NIR observations
  24. GRB 080130(?): Swift XRT observation
  25. GRB 080130?: Detection of a possible burst by BATSS
  26. GRB 080129: Optical observations from OSN
  27. GRB 080129: Swift-XRT refined analysis
  28. GRB 080129: KAIT optical limits
  29. GRB 080123: Early afterglow detection with BATSS (BAT Slew Survey)
  30. GRB 080129: optical limit by Pi of the Sky
  31. GRB 080129, Swift-BAT refined analysis
  32. GRB 080129: TAROT La Silla observatory optical observations
  33. GRB 080129: Gemini-South photometry
  34. GRB 080129: GROND detection in all bands, and fading
  35. GRB 080129: GROND detection of the optical/NIR afterglow, and fading
  36. GRB 080129: Enhanced Swift-XRT position
  37. GRB 080129: Gemini-South Imaging Observations
  38. GRB 080129: Swift XRT position
  39. GRB 080129 (?): UVOT Upper Limits
  40. GRB 080129 (?): Swift detection of a possible burst
  41. A new website of high-level data products for Swift GRBs
  42. GRB 080121: Upper limit on X-ray afterglow
  43. GRB 080123 : Suzaku WAM observation of the prompt emission
  44. Swift trigger(=301779) is not a GRB
  45. GRB 080122: pseudo-z= 1.93 from prompt emission spectrum
  46. Konus-Wind observation of GRB 080122
  47. GRB 080122 : Suzaku WAM observation of the prompt emission
  48. GRB 080121: Swift/UVOT upper limits
  49. SNe 2008D and 2007uy: Chandra Detections
  50. GRB 080121 position was incorrect
  51. GRB 080121: Enhanced Swift-XRT position
  52. IPN triangulation of GRB080122
  53. GRB 080121: Nearby SDSS galaxies
  54. GRB 080121: Swift-BAT detection of a very weak, short burst
  55. GRB 080123: Swift-XRT refined analysis
  56. GRB 080123: Swift/UVOT refined analysis
  57. X-ray transient in NGC 2770: RTT150 optical observations
  58. GRB 080123, Swift-BAT refined analysis
  59. GRB 080123: Enhanced Swift-XRT position
  60. GRB 080123: Swift detection of a short burst
  61. GRB 080120: GROND confirmation of the optical afterglow
  62. VLA radio upper limit on GRB 080120
  63. GRB 080120: Swift-XRT refined analysis
  64. GRB 080120: GROND detection
  65. GRB 080120 : Planned XMM-Newton observation
  66. GRB080120: Swift XRT position
  67. GRB 080120: a long GRB detected by INTEGRAL
  68. XRF 080109 / SN 2008D: spectroscopic evolution
  69. Swift observations of the X-ray transient in NGC 2770 (aka SN2008D)
  70. XRB 080109/SN 2008D: Early decline in brightness and change in colors
  71. XRF 080109 in NGC2770: Detectable Superluminal Motion
  72. Detailed Spectroscopic ID of SN 2008D (Transient in NGC 2770)
  73. Transient in NGC 2770: spectroscopic evidence for a SN
  74. Bright X-ray transient / possible XRF in NGC 2770: TNG R imaging
  75. GRB 071227: Suzaku WAM observation of the prompt emission
  76. GRB 071227: optical afterglow
  77. Further Swift-BAT analysis of GRB 071227
  78. Konus-Wind observation of GRB 071227
  79. GRB 071227: Magellan redshift confirmation
  80. GRB 071227: Swift-XRT refined analysis
  81. GRB 071227: VLT probable redshift of the candidate host galaxy
  82. GRB 071227: Magellan observations
  83. GRB 071227: REM NIR and Optical observations
  84. Swift-BAT refined analysis of short GRB 071227
  85. GRB 071227: Swift detection of a burst
  86. GRB071020: optical observations
  87. GRB 070429B: Possible UVOT Detection of an Optical Afterglow
  88. Swift-BAT trigger 298308 is not a GRB
  89. GRB 071208?: Swift detection of a possible burst
  90. IBAS Alert #4772 in not a GRB
  91. GRB 071125: Suzaku WAM observation of the prompt emission
  92. GRB 070429B: Probable host galaxy and redshift
  93. GRB 071129, Swift-BAT refined analysis
  94. GRB 071129: Swift detection of a burst
  95. Konus-Wind and Konus-A observations of GRB 071125
  96. IPN triangulation of very bright GRB 071125
  97. GRB 071112C: Optical/NIR observations
  98. Disregard the "GRB 071126" position
  99. GRB 071126: Enhanced Swift-XRT position
  100. VLA radio detection of GRB 071122

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