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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"

42942 results found.

  1. GRB 060123: P200 Observations
  2. GRB 060124: Keck optical spectrum
  3. GRB 060124: Keck Absorption Redshift
  4. GRB 060124: MDM Optical Spectrum
  5. GRB 060124: XRT refined analysis
  6. GRB 060124: R band Observations
  7. GRB 060124 : Optical observation at Xinglong and Kiso
  8. GRB060124: optical observations at Asiago
  9. GRB 060124: Extremely long burst, Swift-BAT refined analysis
  10. GRB060123: SDSS pre-burst observations
  11. GRB 060116: Further analysis of VLT photometry and optical spectroscopy
  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. GRB 060124: Optical Observations at Tautenburg
  18. GRB 060117: Suzaku WAM observation of the prompt emission
  19. GRB 060111B: Suzaku WAM observation of the prompt emission
  20. GRB 060124: Swift-BAT detection of a burst
  21. GRB 060116: Radio Detection
  22. GRB 060116: MARGE optical observations
  23. GRB 060121: Liverpool Telescopes optical limits
  24. GRB 060121: Swift XRT refined analysis
  25. Konus-Wind observation of GRB 060121
  26. GRB 060121: Confirmation of Afterglow
  27. GRB 060121: candidate optical counterpart
  28. GRB 060121: Swift XRT refined position
  29. GRB060121: SARA Observations
  30. GRB 060121: optical observations
  31. GRB 060121: optical observations
  32. GRB 060121: Optical imaging
  33. GRB060121 - SDSS pre-burst observations
  34. GRB 060121 (=H4010): Results of preliminary spectral analysis
  35. GRB 060121: A bright short/hard GRB localized by HETE-2 SXC
  36. GRB 060121: A bright short/hard GRB localized by HETE-2 WXM
  37. HETE Alert 4006: MASTER promt optical limit
  38. GRB 060117: PROMPT Observations
  39. GRB060117 - ATCA 3/6cm radio limits - correction
  40. GRB060117 - ATCA 3/6cm radio limits
  41. GRB 060116: photometric redshift - the farthest GRB?
  42. Konus-Wind observation of GRB 060117
  43. GRB 060116: possible I-J dropout
  44. GRB 060116: UKIRT IR Observations
  45. GRB060108: photometric redshift determination
  46. GRB 060117: Refined analysis of the Swift-BAT burst
  47. GRB 060116: PROMPT Observations
  48. GRB 060117: FRAM refined analysis
  49. GRB 060117: FRAM optical afterglow candidate
  50. GRB 060117: nearby galaxy
  51. GRB 060117: Swift-BAT detection of a bright burst
  52. GRB 060116: VLT optical observations
  53. GRB 060115: PROMPT Observations
  54. GRB 060116: XRT refined analysis
  55. GRB 060116: IR Candidate Afterglow
  56. GRB 060116: Swift/UVOT upper limits
  57. GRB060115: REM observations
  58. GRB 060110: XRT position and analysis
  59. GRB 060116 : Lulin optical limit
  60. GRB 060116: ROTSE-III Optical Limits
  61. GRB060116: Faulkes North observation
  62. GRB 060115: absorption redshift
  63. GRB 060116: Swift-BAT detection of a burst
  64. GRB 060115: Refined analysis of the Swift-BAT burst
  65. GRB 060115: OT photometry with MITSuME
  66. GRB 060114: REM observations
  67. GRB 060115: Swift XRT refined analysis
  68. GRB 060115: OT finding chart
  69. GRB 060114: Swift/UVOT Observations
  70. GRB 060115: MITSuME optical afterglow candidate
  71. GRB 060115: Swift detection of a burst
  72. GRB 060114: Swift XRT upper limit
  73. GRB 060114: refined position
  74. GRB 060114: A long GRB detected by INTEGRAL
  75. GRB060114: Faulkes North observation
  76. GRB 060108: IR observations of afterglow
  77. GRB060108: Faulkes North afterglow evidence
  78. GRB 060108: further analysis of VLT images
  79. GRB 060108: Evidence for an XRT Position Offset
  80. GRB 060110: KAIT observations
  81. GRB 060111B: Swift XRT refined analysis
  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 060111B: Swift detection of a burst
  91. GRB 060111: Swift-BAT Refined Analysis
  92. GRB 060108: VLT K-band observations
  93. GRB 060111: TAROT optical observation
  94. GRB060111 : XRT refined analysis
  95. GRB 060111: ROTSE-III Optical Limits
  96. GRB 060111: Swift detection of a burst
  97. GRB 060110: Mitsume optical observations
  98. GRB 060109: Swift-BAT refined analysis
  99. GRB 060108: z-band imaging from Gemini-North
  100. GRB 060110: UKIRT K-band observations

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