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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"

32715 results found.

  1. GRB060130: Optical imaging
  2. GRB060130: REM infrared observations
  3. GRB 060130, SMARTS optical observations
  4. GRB 060130: FRAM optical observations
  5. Possible GRB 051221B: MDM Correction
  6. GRB050121: optical observation
  7. GRB050121b: optical observation
  8. GRB 060121: Confirmation of NIR Afterglow
  9. GRB060124: optical observation
  10. GRB060124: optical observations
  11. GRB 060123: Swift refined analysis of an unusual GRB
  12. GRB060124, BVRcIc field calibration
  13. GRB060124 optical observations
  14. GRB 060121: Probable Detection of NIR Afterglow
  15. GRB060124: optical observation
  16. GRB 060116 HST observations
  17. GRB 060124: HETE detection and spectrum of the main peak
  18. Refined XRT Position for GRB 060123
  19. Konus-Wind observation of GRB 060124
  20. GRB060124: detailed XRT analysis
  21. GRB 060124 Optical Observations
  22. GRB 060124: ART optical limits during the burst
  23. GRB060123: Optical and IR Imaging
  24. GRB 060123: P200 Observations
  25. GRB 060124: Keck optical spectrum
  26. GRB 060124: Keck Absorption Redshift
  27. GRB 060124: XRT refined analysis
  28. GRB 060124: R band Observations
  29. GRB060124: optical observations at Asiago
  30. GRB 060124: Extremely long burst, Swift-BAT refined analysis
  31. GRB060123: SDSS pre-burst observations
  32. GRB 060123: Swift detection of a very long, faint burst
  33. GRB 060116: Further analysis of VLT photometry and optical spectroscopy
  34. GRB 060121: OHP optical limits
  35. GRB 060124: TAROT optical limits
  36. GRB 060124: Swift/UVOT Observation
  37. GRB 060124: Confirmation of the Afterglow
  38. GRB 060124: XRT position
  39. GRB 060124: Optical Afterglow Candidate from Tautenburg
  40. GRB060124, optical observation
  41. GRB 060124: Optical Observations at Tautenburg
  42. GRB 060117: Suzaku WAM observation of the prompt emission
  43. GRB 060111B: Suzaku WAM observation of the prompt emission
  44. GRB 060116: Radio Detection
  45. GRB 060116: MARGE optical observations
  46. GRB 060121: Swift/UVOT upper limits
  47. GRB 060121: Liverpool Telescopes optical limits
  48. GRB 060121: Swift XRT refined analysis
  49. Konus-Wind observation of GRB 060121
  50. GRB 060121: I-band Limits
  51. GRB 060121: Confirmation of Afterglow
  52. GRB 060121: candidate optical counterpart
  53. GRB 060121: Swift XRT refined position
  54. GRB060121: SARA Observations
  55. GRB 060121: optical observations
  56. GRB 060121: Infrared Observations
  57. GRB 060121: optical observations
  58. GRB 060121: Optical imaging
  59. GRB060121 - SDSS pre-burst observations
  60. GRB 060121: A short-hard GRB in a cluster?
  61. GRB 060121: A bright short/hard GRB localized by HETE-2 WXM
  62. GRB 060117: PROMPT Observations
  63. GRB060117 - ATCA 3/6cm radio limits - correction
  64. GRB060117 - ATCA 3/6cm radio limits
  65. GRB 060116: photometric redshift - the farthest GRB?
  66. Correction to GCN 4542 on GRB 060117
  67. Konus-Wind observation of GRB 060117
  68. GRB 060116: possible I-J dropout
  69. GRB 060116: UKIRT IR Observations
  70. GRB060108: photometric redshift determination
  71. GRB 060117: Refined analysis of the Swift-BAT burst
  72. GRB 060116: PROMPT Observations
  73. GRB 060117: FRAM refined analysis
  74. GRB 060117: FRAM optical afterglow candidate
  75. GRB 060117: nearby galaxy
  76. GRB 060116: VLT optical observations
  77. GRB 060116: Refined analysis of the Swift-BAT burst
  78. GRB 060115: PROMPT Observations
  79. GRB 060116: XRT refined analysis
  80. GRB 060116: IR Candidate Afterglow
  81. GRB 060116: Swift/UVOT upper limits
  82. GRB060115: REM observations
  83. GRB 060110: XRT position and analysis
  84. GRB 060116 : Lulin optical limit
  85. GRB 060116: ROTSE-III Optical Limits
  86. GRB060116: XRT position
  87. GRB 060115: absorption redshift
  88. GRB 060115: Refined analysis of the Swift-BAT burst
  89. GRB 060115: OT photometry with MITSuME
  90. GRB 060115: Swift/UVOT upper limits
  91. GRB 060114: REM observations
  92. GRB 060115: Swift XRT refined analysis
  93. GRB 060115: OT finding chart
  94. GRB 060114: Swift/UVOT Observations
  95. GRB060115, optical observation
  96. GRB 060115: MITSuME optical afterglow candidate
  97. GRB 060114: Swift XRT upper limit
  98. GRB060114, optical observation
  99. GRB 060108: IR observations of afterglow
  100. GRB 060108: further analysis of VLT images

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