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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"

41954 results found.

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

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