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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"

36348 results found.

  1. GRB 080129: Swift XRT position
  2. GRB 080129 (?): UVOT Upper Limits
  3. GRB 080129 (?): Swift detection of a possible burst
  4. A new website of high-level data products for Swift GRBs
  5. GRB 080121: Upper limit on X-ray afterglow
  6. GRB 080123 : Suzaku WAM observation of the prompt emission
  7. Swift trigger(=301779) is not a GRB
  8. GRB 080122: pseudo-z= 1.93 from prompt emission spectrum
  9. Konus-Wind observation of GRB 080122
  10. GRB 080122 : Suzaku WAM observation of the prompt emission
  11. GRB 080121: Swift/UVOT upper limits
  12. SNe 2008D and 2007uy: Chandra Detections
  13. GRB 080121 position was incorrect
  14. GRB 080121: Enhanced Swift-XRT position
  15. IPN triangulation of GRB080122
  16. GRB 080121: Nearby SDSS galaxies
  17. GRB 080121: Swift-BAT detection of a very weak, short burst
  18. GRB 080123: Swift-XRT refined analysis
  19. GRB 080123: Swift/UVOT refined analysis
  20. X-ray transient in NGC 2770: RTT150 optical observations
  21. GRB 080123, Swift-BAT refined analysis
  22. GRB 080123: Enhanced Swift-XRT position
  23. GRB 080123: Swift detection of a short burst
  24. GRB 080120: GROND confirmation of the optical afterglow
  25. VLA radio upper limit on GRB 080120
  26. GRB 080120: Swift-XRT refined analysis
  27. GRB 080120: GROND detection
  28. GRB 080120 : Planned XMM-Newton observation
  29. GRB080120: Swift XRT position
  30. GRB 080120: a long GRB detected by INTEGRAL
  31. XRF 080109 / SN 2008D: spectroscopic evolution
  32. Swift observations of the X-ray transient in NGC 2770 (aka SN2008D)
  33. XRB 080109/SN 2008D: Early decline in brightness and change in colors
  34. XRF 080109 in NGC2770: Detectable Superluminal Motion
  35. Detailed Spectroscopic ID of SN 2008D (Transient in NGC 2770)
  36. Transient in NGC 2770: spectroscopic evidence for a SN
  37. Bright X-ray transient / possible XRF in NGC 2770: TNG R imaging
  38. GRB 071227: Suzaku WAM observation of the prompt emission
  39. GRB 071227: optical afterglow
  40. Further Swift-BAT analysis of GRB 071227
  41. Konus-Wind observation of GRB 071227
  42. GRB 071227: Magellan redshift confirmation
  43. GRB 071227: Swift-XRT refined analysis
  44. GRB 071227: VLT probable redshift of the candidate host galaxy
  45. GRB 071227: Magellan observations
  46. GRB 071227: REM NIR and Optical observations
  47. Swift-BAT refined analysis of short GRB 071227
  48. GRB 071227: Swift detection of a burst
  49. GRB071020: optical observations
  50. GRB 070429B: Possible UVOT Detection of an Optical Afterglow
  51. Swift-BAT trigger 298308 is not a GRB
  52. GRB 071208?: Swift detection of a possible burst
  53. IBAS Alert #4772 in not a GRB
  54. GRB 071125: Suzaku WAM observation of the prompt emission
  55. GRB 070429B: Probable host galaxy and redshift
  56. GRB 071129, Swift-BAT refined analysis
  57. GRB 071129: Swift detection of a burst
  58. Konus-Wind and Konus-A observations of GRB 071125
  59. IPN triangulation of very bright GRB 071125
  60. GRB 071112C: Optical/NIR observations
  61. Disregard the "GRB 071126" position
  62. GRB 071126: Enhanced Swift-XRT position
  63. VLA radio detection of GRB 071122
  64. GRB071122: Swift/UVOT Observations
  65. GRB071104: NIR Afterglow Candidate at TNG
  66. GRB 071122: MASTER optical observation
  67. GRB 071122, Swift-BAT refined analysis
  68. GRB 071122 Swift XRT position update sent in error.
  69. GRB 071122 Swift-XRT refined analysis
  70. GRB 071122: Corrected P60 Coordinates
  71. GRB071122: Gemini Absorption redshift
  72. GRB 071122: P60 Optical Afterglow Candidate
  73. GRB 071122: ROTSE-III Optical Limits
  74. GRB 071122: Swift detection of a burst
  75. GRB 071118: P60 Observations
  76. GRB071118 MITSuME OAO optical observation
  77. GRB 071118: Observations from OSN
  78. GRB 071117: VLT observations and probable redshift
  79. Swift/UVOT observations of GRB071118
  80. GRB 071117: Swift-XRT revised position
  81. Konus-Wind and Konus-A observations of GRB 071117
  82. Swift XRT follow-up observations of GRB071008
  83. Swift/UVOT upper limits for GRB 071117
  84. GRB071118: Swift XRT refined analysis
  85. GRB 071117: Gemini Optical Afterglow Discovery
  86. GRB 071118, Swift-BAT refined analysis
  87. GRB 071117: TAROT La Silla observatory optical observations
  88. GRB 071112B: Gemini Image Differencing
  89. GRB 071118: Swift detection of a burst
  90. GRB 071117: Gemini Observations
  91. GRB 071117: Las Campanas optical observations
  92. GRB 071117: Swift-XRT refined analysis
  93. GRB 071117, Swift-BAT refined analysis
  94. VLT FORS2 observations of short hard GRB071112B
  95. GRB 071117: Swift/XRT position
  96. GRB 071117: Initial Swift/UVOT observations
  97. GRB 071117: Swift detection of a bright burst
  98. VLA radio upper limit on GRB 071112C
  99. ATCA radio observations of short hard burst GRB 071112B
  100. GRB 071112C: Optical and NIR data observed with KANATA

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