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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"

32692 results found.

  1. GRB 060123: P200 Observations
  2. GRB 060124: Keck optical spectrum
  3. GRB 060124: Keck Absorption Redshift
  4. GRB 060124: XRT refined analysis
  5. GRB 060124: R band Observations
  6. GRB060124: optical observations at Asiago
  7. GRB 060124: Extremely long burst, Swift-BAT refined analysis
  8. GRB060123: SDSS pre-burst observations
  9. GRB 060123: Swift detection of a very long, faint burst
  10. GRB 060116: Further analysis of VLT photometry and optical spectroscopy
  11. GRB 060121: OHP optical limits
  12. GRB 060124: TAROT optical limits
  13. GRB 060124: Swift/UVOT Observation
  14. GRB 060124: Confirmation of the Afterglow
  15. GRB 060124: XRT position
  16. GRB 060124: Optical Afterglow Candidate from Tautenburg
  17. GRB060124, optical observation
  18. GRB 060124: Optical Observations at Tautenburg
  19. GRB 060117: Suzaku WAM observation of the prompt emission
  20. GRB 060111B: Suzaku WAM observation of the prompt emission
  21. GRB 060116: Radio Detection
  22. GRB 060116: MARGE optical observations
  23. GRB 060121: Swift/UVOT upper limits
  24. GRB 060121: Liverpool Telescopes optical limits
  25. GRB 060121: Swift XRT refined analysis
  26. Konus-Wind observation of GRB 060121
  27. GRB 060121: I-band Limits
  28. GRB 060121: Confirmation of Afterglow
  29. GRB 060121: candidate optical counterpart
  30. GRB 060121: Swift XRT refined position
  31. GRB060121: SARA Observations
  32. GRB 060121: optical observations
  33. GRB 060121: Infrared Observations
  34. GRB 060121: optical observations
  35. GRB 060121: Optical imaging
  36. GRB060121 - SDSS pre-burst observations
  37. GRB 060121: A short-hard GRB in a cluster?
  38. GRB 060121: A bright short/hard GRB localized by HETE-2 WXM
  39. GRB 060117: PROMPT Observations
  40. GRB060117 - ATCA 3/6cm radio limits - correction
  41. GRB060117 - ATCA 3/6cm radio limits
  42. GRB 060116: photometric redshift - the farthest GRB?
  43. Correction to GCN 4542 on GRB 060117
  44. Konus-Wind observation of GRB 060117
  45. GRB 060116: possible I-J dropout
  46. GRB 060116: UKIRT IR Observations
  47. GRB060108: photometric redshift determination
  48. GRB 060117: Refined analysis of the Swift-BAT burst
  49. GRB 060116: PROMPT Observations
  50. GRB 060117: FRAM refined analysis
  51. GRB 060117: FRAM optical afterglow candidate
  52. GRB 060117: nearby galaxy
  53. GRB 060116: VLT optical observations
  54. GRB 060116: Refined analysis of the Swift-BAT burst
  55. GRB 060115: PROMPT Observations
  56. GRB 060116: XRT refined analysis
  57. GRB 060116: IR Candidate Afterglow
  58. GRB 060116: Swift/UVOT upper limits
  59. GRB060115: REM observations
  60. GRB 060110: XRT position and analysis
  61. GRB 060116 : Lulin optical limit
  62. GRB 060116: ROTSE-III Optical Limits
  63. GRB060116: XRT position
  64. GRB 060115: absorption redshift
  65. GRB 060115: Refined analysis of the Swift-BAT burst
  66. GRB 060115: OT photometry with MITSuME
  67. GRB 060115: Swift/UVOT upper limits
  68. GRB 060114: REM observations
  69. GRB 060115: Swift XRT refined analysis
  70. GRB 060115: OT finding chart
  71. GRB 060114: Swift/UVOT Observations
  72. GRB060115, optical observation
  73. GRB 060115: MITSuME optical afterglow candidate
  74. GRB 060114: Swift XRT upper limit
  75. GRB060114, optical observation
  76. GRB 060108: IR observations of afterglow
  77. GRB 060108: further analysis of VLT images
  78. GRB 060108: Evidence for an XRT Position Offset
  79. GRB 060110: KAIT observations
  80. GRB 060111B: Swift XRT refined analysis
  81. GRB 060111A: refined UVOT anaysis
  82. GRB 060111B: MITSuME detection of optical afterglow
  83. GRB 060111B: TAROT optical observation
  84. GRB060111B: RTT150, possible host galaxy
  85. GRB 060111B: Refined analysis of the Swift-BAT burst
  86. GRB 060110: MARGE observations
  87. GRB 060111(a): P60 Observations
  88. GRB 060111B: Gualba observatory limit
  89. GRB 060111B: ROTSE-III Detection of Optical Counterpart Flare
  90. GRB 060111: Swift-BAT Refined Analysis
  91. GRB 060108: VLT K-band observations
  92. GRB 060111: TAROT optical observation
  93. GRB 060111: possible UVOT counterpart
  94. GRB060111 : XRT refined analysis
  95. GRB 060111: ROTSE-III Optical Limits
  96. GRB 060110: Mitsume optical observations
  97. GRB 060110: Swift-BAT refined analysis
  98. GRB 060109: Swift-BAT refined analysis
  99. GRB 060108: z-band imaging from Gemini-North
  100. GRB 060110a: RAPTOR detection of early optical emission.

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