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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"

45528 results found.

  1. GRB 060124: Keck optical spectrum
  2. GRB 060124: Keck Absorption Redshift
  3. GRB 060124: MDM Optical Spectrum
  4. GRB 060124: XRT refined analysis
  5. GRB 060124: R band Observations
  6. GRB 060124 : Optical observation at Xinglong and Kiso
  7. GRB060124: optical observations at Asiago
  8. GRB 060124: Extremely long burst, Swift-BAT refined analysis
  9. GRB060123: SDSS pre-burst observations
  10. GRB 060123: Swift detection of a very long, faint burst
  11. GRB 060116: Further analysis of VLT photometry and optical spectroscopy
  12. GRB 060121: OHP optical limits
  13. GRB 060124: TAROT optical limits
  14. GRB 060124: Swift/UVOT Observation
  15. GRB 060124: Confirmation of the Afterglow
  16. GRB 060124: XRT position
  17. GRB 060124: Optical Afterglow Candidate from Tautenburg
  18. GRB060124, optical observation
  19. GRB 050124 : Kiso Optical limit
  20. GRB 060124: Optical Observations at Tautenburg
  21. GRB 060117: Suzaku WAM observation of the prompt emission
  22. GRB 060111B: Suzaku WAM observation of the prompt emission
  23. GRB 060124: Swift-BAT detection of a burst
  24. GRB 060116: Radio Detection
  25. GRB 060116: MARGE optical observations
  26. GRB 060121: Swift/UVOT upper limits
  27. GRB 060121: Liverpool Telescopes optical limits
  28. GRB 060121: Swift XRT refined analysis
  29. Konus-Wind observation of GRB 060121
  30. GRB 060121: I-band Limits
  31. GRB 060121: Confirmation of Afterglow
  32. GRB 060121: candidate optical counterpart
  33. GRB 060121: Swift XRT refined position
  34. GRB060121: SARA Observations
  35. GRB 060121: optical observations
  36. GRB 060121: Infrared Observations
  37. GRB 060121: optical observations
  38. GRB 060121: Optical imaging
  39. GRB060121 - SDSS pre-burst observations
  40. GRB 060121: A short-hard GRB in a cluster?
  41. GRB 060121 (=H4010): Results of preliminary spectral analysis
  42. GRB 060121: A bright short/hard GRB localized by HETE-2 SXC
  43. GRB 060121: A bright short/hard GRB localized by HETE-2 WXM
  44. HETE Alert 4006: MASTER promt optical limit
  45. GRB 060117: PROMPT Observations
  46. GRB060117 - ATCA 3/6cm radio limits - correction
  47. GRB060117 - ATCA 3/6cm radio limits
  48. GRB 060116: photometric redshift - the farthest GRB?
  49. GRB 060117: pseudo-z from spectral parameters of the prompt emission
  50. Correction to GCN 4542 on GRB 060117
  51. Konus-Wind observation of GRB 060117
  52. GRB 060116: possible I-J dropout
  53. GRB 060116: UKIRT IR Observations
  54. GRB060108: photometric redshift determination
  55. GRB 060117: Refined analysis of the Swift-BAT burst
  56. GRB 060116: PROMPT Observations
  57. GRB 060117: FRAM refined analysis
  58. GRB 060117: FRAM optical afterglow candidate
  59. GRB 060117: nearby galaxy
  60. GRB 060117: Swift-BAT detection of a bright burst
  61. GRB 060116: VLT optical observations
  62. GRB 060116: Refined analysis of the Swift-BAT burst
  63. GRB 060115: PROMPT Observations
  64. GRB 060116: XRT refined analysis
  65. GRB 060116: IR Candidate Afterglow
  66. GRB 060116: Swift/UVOT upper limits
  67. GRB060115: REM observations
  68. GRB 060110: XRT position and analysis
  69. GRB 060116 : Lulin optical limit
  70. GRB 060116: ROTSE-III Optical Limits
  71. GRB060116: XRT position
  72. GRB060116: Faulkes North observation
  73. GRB 060115: absorption redshift
  74. GRB 060116: Swift-BAT detection of a burst
  75. GRB 060115: Refined analysis of the Swift-BAT burst
  76. GRB 060115: OT photometry with MITSuME
  77. GRB 060115: Swift/UVOT upper limits
  78. GRB 060114: REM observations
  79. GRB 060115: Swift XRT refined analysis
  80. GRB 060115: OT finding chart
  81. GRB 060114: Swift/UVOT Observations
  82. GRB060115, optical observation
  83. GRB 060115: MITSuME optical afterglow candidate
  84. GRB 060115: Swift detection of a burst
  85. GRB 060114: Swift XRT upper limit
  86. GRB060114, optical observation
  87. GRB 060114: refined position
  88. GRB 060114: A long GRB detected by INTEGRAL
  89. GRB060114: Faulkes North observation
  90. GRB 060108: IR observations of afterglow
  91. GRB060108: Faulkes North afterglow evidence
  92. GRB 060108: further analysis of VLT images
  93. GRB 060108: Evidence for an XRT Position Offset
  94. GRB 060110: KAIT observations
  95. GRB 060111B: Swift XRT refined analysis
  96. GRB 060111A: refined UVOT anaysis
  97. GRB 060111B: MITSuME detection of optical afterglow
  98. GRB 060111B: TAROT optical observation
  99. GRB060111A: RTT150 optical observations
  100. GRB060111B: RTT150, possible host galaxy

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