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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"

36142 results found.

  1. GRB 080129: Enhanced Swift-XRT position
  2. GRB 080129: Gemini-South Imaging Observations
  3. GRB 080129: Swift XRT position
  4. GRB 080129 (?): UVOT Upper Limits
  5. GRB 080129 (?): Swift detection of a possible burst
  6. A new website of high-level data products for Swift GRBs
  7. GRB 080121: Upper limit on X-ray afterglow
  8. GRB 080123 : Suzaku WAM observation of the prompt emission
  9. Swift trigger(=301779) is not a GRB
  10. GRB 080122: pseudo-z= 1.93 from prompt emission spectrum
  11. Konus-Wind observation of GRB 080122
  12. GRB 080122 : Suzaku WAM observation of the prompt emission
  13. GRB 080121: Swift/UVOT upper limits
  14. SNe 2008D and 2007uy: Chandra Detections
  15. GRB 080121 position was incorrect
  16. GRB 080121: Enhanced Swift-XRT position
  17. IPN triangulation of GRB080122
  18. GRB 080121: Nearby SDSS galaxies
  19. GRB 080121: Swift-BAT detection of a very weak, short burst
  20. GRB 080123: Swift-XRT refined analysis
  21. GRB 080123: Swift/UVOT refined analysis
  22. X-ray transient in NGC 2770: RTT150 optical observations
  23. GRB 080123, Swift-BAT refined analysis
  24. GRB 080123: Enhanced Swift-XRT position
  25. GRB 080123: Swift detection of a short burst
  26. GRB 080120: GROND confirmation of the optical afterglow
  27. VLA radio upper limit on GRB 080120
  28. GRB 080120: Swift-XRT refined analysis
  29. GRB 080120: GROND detection
  30. GRB 080120 : Planned XMM-Newton observation
  31. GRB080120: Swift XRT position
  32. GRB 080120: a long GRB detected by INTEGRAL
  33. XRF 080109 / SN 2008D: spectroscopic evolution
  34. Swift observations of the X-ray transient in NGC 2770 (aka SN2008D)
  35. XRB 080109/SN 2008D: Early decline in brightness and change in colors
  36. XRF 080109 in NGC2770: Detectable Superluminal Motion
  37. Detailed Spectroscopic ID of SN 2008D (Transient in NGC 2770)
  38. Transient in NGC 2770: spectroscopic evidence for a SN
  39. Bright X-ray transient / possible XRF in NGC 2770: TNG R imaging
  40. GRB 071227: Suzaku WAM observation of the prompt emission
  41. GRB 071227: optical afterglow
  42. Further Swift-BAT analysis of GRB 071227
  43. Konus-Wind observation of GRB 071227
  44. GRB 071227: Magellan redshift confirmation
  45. GRB 071227: Swift-XRT refined analysis
  46. GRB 071227: VLT probable redshift of the candidate host galaxy
  47. GRB 071227: Magellan observations
  48. GRB 071227: REM NIR and Optical observations
  49. Swift-BAT refined analysis of short GRB 071227
  50. GRB 071227: Swift detection of a burst
  51. GRB071020: optical observations
  52. GRB 070429B: Possible UVOT Detection of an Optical Afterglow
  53. Swift-BAT trigger 298308 is not a GRB
  54. GRB 071208?: Swift detection of a possible burst
  55. IBAS Alert #4772 in not a GRB
  56. GRB 071125: Suzaku WAM observation of the prompt emission
  57. GRB 070429B: Probable host galaxy and redshift
  58. GRB 071129, Swift-BAT refined analysis
  59. GRB 071129: Swift detection of a burst
  60. Konus-Wind and Konus-A observations of GRB 071125
  61. IPN triangulation of very bright GRB 071125
  62. GRB 071112C: Optical/NIR observations
  63. Disregard the "GRB 071126" position
  64. GRB 071126: Enhanced Swift-XRT position
  65. VLA radio detection of GRB 071122
  66. GRB071122: Swift/UVOT Observations
  67. GRB071104: NIR Afterglow Candidate at TNG
  68. GRB 071122: MASTER optical observation
  69. GRB 071122, Swift-BAT refined analysis
  70. GRB 071122 Swift XRT position update sent in error.
  71. GRB 071122 Swift-XRT refined analysis
  72. GRB 071122: Corrected P60 Coordinates
  73. GRB071122: Gemini Absorption redshift
  74. GRB 071122: P60 Optical Afterglow Candidate
  75. GRB 071122: ROTSE-III Optical Limits
  76. GRB 071122: Swift detection of a burst
  77. GRB 071118: P60 Observations
  78. GRB071118 MITSuME OAO optical observation
  79. GRB 071118: Observations from OSN
  80. GRB 071117: VLT observations and probable redshift
  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 071117: Gemini Optical Afterglow Discovery
  88. GRB 071118, Swift-BAT refined analysis
  89. GRB 071117: TAROT La Silla observatory optical observations
  90. GRB 071112B: Gemini Image Differencing
  91. GRB 071118: Swift detection of a burst
  92. GRB 071117: Gemini Observations
  93. GRB 071117: Las Campanas optical observations
  94. GRB 071117: Swift-XRT refined analysis
  95. GRB 071117, Swift-BAT refined analysis
  96. VLT FORS2 observations of short hard GRB071112B
  97. GRB 071117: Swift/XRT position
  98. GRB 071117: Initial Swift/UVOT observations
  99. GRB 071117: Swift detection of a bright burst
  100. VLA radio upper limit on GRB 071112C

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