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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"

26128 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 080121: Swift/UVOT upper limits
  11. SNe 2008D and 2007uy: Chandra Detections
  12. GRB 080121 position was incorrect
  13. GRB 080121: Enhanced Swift-XRT position
  14. Two non-burst Swift SubThreshold triggers
  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. GRB 080123, Swift-BAT refined analysis
  21. GRB 080123: Enhanced Swift-XRT position
  22. GRB 080123: Swift detection of a short burst
  23. GRB 080120: GROND confirmation of the optical afterglow
  24. VLA radio upper limit on GRB 080120
  25. GRB 080120: Swift-XRT refined analysis
  26. UVOT detection of GRB080120
  27. GRB 080120: GROND detection
  28. GRB080120: Swift XRT position
  29. Swift UVOT Monitoring of the SN 2008D Brightening (Transient in NGC 2770)
  30. optical observations, XRT in NGC 2770
  31. Swift observations of the X-ray transient in NGC 2770 (aka SN2008D)
  32. XRB 080109/SN 2008D: Early decline in brightness and change in colors
  33. XRB 080109/SN 2008D:PAIRITEL NIR observations and t_0 from Swift
  34. XRF 080109 in NGC2770: Detectable Superluminal Motion
  35. XRF in NGC 2770: Search for X-ray periodicity
  36. Refined Swift-XRT analysis of the transient in NGC 2770
  37. Transient in NGC 2770: spectroscopic evidence for a SN
  38. Refined Swift UVOT Analysis of SN 2008D (Transient in NGC 2770)
  39. Swift UVOT Observations of the X-ray transient in NGC 2770
  40. Early OT detection of XRF in NGC 2770 in Asiago frames
  41. Bright X-ray Transient in NGC 2770 - A low-luminosity XRF?
  42. GRB 071227: Suzaku WAM observation of the prompt emission
  43. GRB 071227: optical afterglow
  44. Further Swift-BAT analysis of GRB 071227
  45. Konus-Wind observation of GRB 071227
  46. GRB 071227: Swift-XRT refined analysis
  47. GRB 071227: VLT probable redshift of the candidate host galaxy
  48. GRB 071227: Magellan observations
  49. GRB071227: Swift/UVOT refined analysis
  50. GRB 071227: REM NIR and Optical observations
  51. Swift-BAT refined analysis of short GRB 071227
  52. GRB 071227: Swift detection of a burst
  53. GRB071020: optical observations
  54. GRB 070429B: Possible UVOT Detection of an Optical Afterglow
  55. Swift-BAT trigger 298308 is not a GRB
  56. GRB 071208?: Swift detection of a possible burst
  57. GRB 070429B: Probable host galaxy and redshift
  58. GRB 071129, Swift-BAT refined analysis
  59. GRB 071129: Swift detection of a burst
  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, Swift-BAT refined analysis
  67. GRB 071122 Swift XRT position update sent in error.
  68. GRB 071122 Swift-XRT refined analysis
  69. GRB 071122: Corrected P60 Coordinates
  70. GRB071122: Gemini Absorption redshift
  71. GRB 071122: P60 Optical Afterglow Candidate
  72. GRB 071122: ROTSE-III Optical Limits
  73. GRB 071122: Swift detection of a burst
  74. GRB 071118: P60 Observations
  75. GRB071118 MITSuME OAO optical observation
  76. GRB 071118: Observations from OSN
  77. GRB 071117: VLT observations and probable redshift
  78. Swift/UVOT observations of GRB071118
  79. GRB 071117: Swift-XRT revised position
  80. Konus-Wind and Konus-A observations of GRB 071117
  81. Swift XRT follow-up observations of GRB071008
  82. Swift/UVOT upper limits for GRB 071117
  83. GRB071118: Swift XRT refined analysis
  84. GRB 071117: Gemini Optical Afterglow Discovery
  85. GRB 071118, Swift-BAT refined analysis
  86. GRB 071117: TAROT La Silla observatory optical observations
  87. GRB 071118: Swift detection of a burst
  88. GRB 071117: Gemini Observations
  89. GRB 071117: Las Campanas optical observations
  90. GRB 071117: Swift-XRT refined analysis
  91. GRB 071117, Swift-BAT refined analysis
  92. VLT FORS2 observations of short hard GRB071112B
  93. GRB 071117: Swift/XRT position
  94. GRB 071117: Initial Swift/UVOT observations
  95. GRB 071117: Swift detection of a bright burst
  96. Swift detection of MXB 0656-072
  97. VLA radio upper limit on GRB 071112C
  98. ATCA radio observations of short hard burst GRB 071112B
  99. Correction to the Swift-BAT Transient Identification (trigger=296683)
  100. GRB 071112C: WSRT Radio Observations

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