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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"

41948 results found.

  1. GRB 060121: Confirmation of Afterglow
  2. GRB 060121: candidate optical counterpart
  3. GRB 060121: Swift XRT refined position
  4. GRB060121: SARA Observations
  5. GRB 060121: optical observations
  6. GRB 060121: Infrared Observations
  7. GRB 060121: optical observations
  8. GRB 060121: Optical imaging
  9. GRB060121 - SDSS pre-burst observations
  10. GRB 060121: A short-hard GRB in a cluster?
  11. GRB 060121 (=H4010): Results of preliminary spectral analysis
  12. GRB 060121: A bright short/hard GRB localized by HETE-2 SXC
  13. GRB 060121: A bright short/hard GRB localized by HETE-2 WXM
  14. GRB 060117: PROMPT Observations
  15. GRB060117 - ATCA 3/6cm radio limits - correction
  16. GRB060117 - ATCA 3/6cm radio limits
  17. GRB 060116: photometric redshift - the farthest GRB?
  18. GRB 060117: pseudo-z from spectral parameters of the prompt emission
  19. Konus-Wind observation of GRB 060117
  20. GRB 060116: possible I-J dropout
  21. GRB 060116: UKIRT IR Observations
  22. GRB060108: photometric redshift determination
  23. GRB 060117: Refined analysis of the Swift-BAT burst
  24. GRB 060116: PROMPT Observations
  25. GRB 060117: FRAM refined analysis
  26. GRB 060117: nearby galaxy
  27. GRB 060117: Swift-BAT detection of a bright burst
  28. GRB 060116: VLT optical observations
  29. GRB 060115: PROMPT Observations
  30. GRB 060116: XRT refined analysis
  31. GRB 060116: IR Candidate Afterglow
  32. GRB 060116: Swift/UVOT upper limits
  33. GRB060115: REM observations
  34. GRB 060110: XRT position and analysis
  35. GRB 060116 : Lulin optical limit
  36. GRB060116: XRT position
  37. GRB060116: Faulkes North observation
  38. GRB 060115: absorption redshift
  39. GRB 060116: Swift-BAT detection of a burst
  40. GRB 060115: OT photometry with MITSuME
  41. GRB 060115: Swift/UVOT upper limits
  42. GRB 060114: REM observations
  43. GRB 060115: Swift XRT refined analysis
  44. GRB 060114: Swift/UVOT Observations
  45. GRB060115, optical observation
  46. GRB 060115: MITSuME optical afterglow candidate
  47. GRB 060115: Swift detection of a burst
  48. GRB 060114: Swift XRT upper limit
  49. GRB060114, optical observation
  50. GRB 060114: A long GRB detected by INTEGRAL
  51. GRB060114: Faulkes North observation
  52. GRB 060108: IR observations of afterglow
  53. GRB060108: Faulkes North afterglow evidence
  54. GRB 060108: Evidence for an XRT Position Offset
  55. GRB 060110: KAIT observations
  56. GRB 060111B: Swift XRT refined analysis
  57. GRB 060111B: MITSuME detection of optical afterglow
  58. GRB 060111B: TAROT optical observation
  59. GRB060111A: RTT150 optical observations
  60. GRB060111B: RTT150, possible host galaxy
  61. GRB 060110: MARGE observations
  62. GRB 060111(a): P60 Observations
  63. GRB 060111B: Gualba observatory limit
  64. GRB 060111B: Swift detection of a burst
  65. GRB 060111: Swift-BAT Refined Analysis
  66. GRB 060108: VLT K-band observations
  67. GRB 060111: TAROT optical observation
  68. GRB060111 : XRT refined analysis
  69. GRB 060111: Swift detection of a burst
  70. GRB 060110: Mitsume optical observations
  71. GRB 060108: z-band imaging from Gemini-North
  72. GRB 060110: UKIRT K-band observations
  73. GRB 060110: IR Candidate Afterglow
  74. GRB060110, optical observation
  75. GRB 060110: Super-LOTIS observations
  76. GRB 060110: Optical observation
  77. GRB 060110: Correction
  78. GRB 050110: IR Observations
  79. GRB 060110: Swift-BAT detection of a burst
  80. GRB 060109: Refined Swift-XRT analysis
  81. GRB 060109: Swift/UVOT upper limits
  82. GRB060109, optical observation
  83. GRB 060108: ISAS early observations and near IR upper limit
  84. GRB060108: P200 Ks Observations
  85. GRB 060108: early UKIRT K-band observations
  86. GRB 060109: Swift Detection of a long burst
  87. GRB 060108: a dark burst?
  88. GRB 060108: Refined XRT analysis
  89. GRB 060108: VLT J-band observations
  90. GRB 060108: Mitsume optical observations
  91. GRB 060108: Swift/UVOT upper limits
  92. GRB060108: SDSS pre-burst observations
  93. GRB060108: Faulkes Telescope observation
  94. GRB060108, optical observation
  95. GRB 060108: Refined analysis of the Swift-BAT burst
  96. GRB 060108: Swift XRT position
  97. GRB060108: Swift detection of its 100th GRB
  98. GRB 060105: Radio observations
  99. GRB 060105: MDM Observation
  100. Konus-Wind observation of GRB 060105

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