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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"

20516 results found.

  1. GRB060114, optical observation
  2. GRB060114: Faulkes North observation
  3. GRB 060108: IR observations of afterglow
  4. GRB 060108: Evidence for an XRT Position Offset
  5. GRB 060110: KAIT observations
  6. GRB 060111B: MITSuME detection of optical afterglow
  7. GRB 060111B: TAROT optical observation
  8. GRB060111A: RTT150 optical observations
  9. GRB060111B: RTT150, possible host galaxy
  10. GRB 060111B: Refined analysis of the Swift-BAT burst
  11. GRB 060111(a): P60 Observations
  12. GRB 060111B: Gualba observatory limit
  13. GRB 060111B: Swift detection of a burst
  14. GRB 060108: VLT K-band observations
  15. GRB 060111: TAROT optical observation
  16. GRB 060111: Swift detection of a burst
  17. GRB 060110: Mitsume optical observations
  18. GRB 060108: z-band imaging from Gemini-North
  19. GRB 060110a: RAPTOR detection of early optical emission.
  20. GRB 060110: UKIRT K-band observations
  21. GRB 060110: IR Candidate Afterglow
  22. GRB060110, optical observation
  23. GRB 060110: Correction
  24. GRB 050110: IR Observations
  25. GRB 060109: Swift/UVOT upper limits
  26. GRB060109, optical observation
  27. GRB 060108: ISAS early observations and near IR upper limit
  28. GRB060108: P200 Ks Observations
  29. GRB 060108: early UKIRT K-band observations
  30. GRB 060108: VLT J-band observations
  31. GRB 060108: Mitsume optical observations
  32. GRB 060108: Swift/UVOT upper limits
  33. GRB 060105: quick look analysis of the Suzaku/XIS afterglow observation
  34. GRB060108: SDSS pre-burst observations
  35. GRB060108: Faulkes Telescope observation
  36. GRB060108, optical observation
  37. GRB 060108: Refined analysis of the Swift-BAT burst
  38. GRB060108: Swift detection of its 100th GRB
  39. GRB 060105: ISAS observations and near IR upper limit
  40. GRB 060105: Swift/UVOT upper limits
  41. GRB 060105: Mitsume optical observations
  42. GRB 060105: XRT refined analysis
  43. GRB060105: Suzaku-XIS and -HXD observation plan
  44. GRB060105, optical observation
  45. GRB060105: Swift detection of a bright long burst
  46. Swift-BAT trigger 175653 is probably not a GRB
  47. GRB 051221B: Optical Observations with Kuiper 1.54m
  48. GRB 051227: optical observation
  49. GRB 051227: optical afterglow
  50. GRB 051227: Magellan r'-band Imaging/Astrometry
  51. GRB 051227: refined analysis of VLT images
  52. GRB 051227: P60 Observations
  53. GRB 051227: MDM Observation
  54. GRB 051227: R-band object in the XRT error circle
  55. GRB051227: SDSS pre-burst observations
  56. GRB 051227, optical observation
  57. GRB 051227: Swift detection of a burst
  58. GRB051117B: optical observation
  59. Konus-Wind observation of GRB 051221A
  60. GRB 051221A: MDM Optical Observations
  61. GRB 051221B: TAROT optical limits
  62. Swift-BAT detection of a possible burst
  63. GRB 051221: Swift/UVOT upper limits
  64. GRB 051221: Improved astrometry of the IR counterpart
  65. GRB 051221: Swift detection of a bright short burst
  66. Swift detection of an RS CVn flare star
  67. GRB051211A: possible optical candidate
  68. GRB 051215: near-infrared observations
  69. GRB051215 - SDSS pre-burst observations
  70. GRB 051215: Swift detection of a possible burst
  71. GRB 051211B, optical observation
  72. GRB 051211A: Swift/UVOT upper limits
  73. GRB 051211B: Swift/UVOT upper limits
  74. GRB 051211A,optical observation
  75. GRB051211B: Liverpool Telescope observation
  76. GRB051211b: P60 Observations
  77. GRB 051211A and GRB051211B: BOOTES simultaneous observations
  78. GRB 051210: Swift/UVOT upper limits
  79. GRB 051210: Magellan Imaging
  80. GRB 051211: TAROT optical limits
  81. GRB 051211B: a possible optical detection by TAROT
  82. GRB 051211:IAC80 optical observations
  83. GRB 051210: SALT detection limit
  84. GRB 051210: Swift XRT refined analysis
  85. GRB 051210: FRAM early limit
  86. GRB051210: Swift UVOT Observation
  87. GRB 051210: Swift detection of a burst
  88. Swift XRT positions
  89. An extraordinary long burst on December 3 from SGR1806-20
  90. GRB051117B: Swift XRT refined analysis
  91. GRB051117b: No Swift/UVOT Detection
  92. GRB 051117A: Swift/UVOT Detection of an Afterglow
  93. GRB 051117B: R and I observations of possible host galaxy
  94. GRB 051117B,optical observation
  95. GRB051114: results of the Swift-XRT observation
  96. GRB 051109B : Nainital upper limits
  97. GRB 051114: Radio Observations
  98. GRB 051114: Swift-BAT refined analysis
  99. GRB050925: analysis of the XMM-Newton observation
  100. GRB 051111: Further spectroscopic analysis

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