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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"

32735 results found.

  1. GRB 060116: Swift/UVOT upper limits
  2. GRB060115: REM observations
  3. GRB 060110: XRT position and analysis
  4. GRB 060116 : Lulin optical limit
  5. GRB 060116: ROTSE-III Optical Limits
  6. GRB060116: XRT position
  7. GRB 060115: absorption redshift
  8. GRB 060115: Refined analysis of the Swift-BAT burst
  9. GRB 060115: OT photometry with MITSuME
  10. GRB 060115: Swift/UVOT upper limits
  11. GRB 060114: REM observations
  12. GRB 060115: Swift XRT refined analysis
  13. GRB 060115: OT finding chart
  14. GRB 060114: Swift/UVOT Observations
  15. GRB060115, optical observation
  16. GRB 060115: MITSuME optical afterglow candidate
  17. GRB 060114: Swift XRT upper limit
  18. GRB060114, optical observation
  19. GRB 060108: IR observations of afterglow
  20. GRB 060108: further analysis of VLT images
  21. GRB 060108: Evidence for an XRT Position Offset
  22. GRB 060110: KAIT observations
  23. GRB 060111B: Swift XRT refined analysis
  24. GRB 060111A: refined UVOT anaysis
  25. GRB 060111B: MITSuME detection of optical afterglow
  26. GRB 060111B: TAROT optical observation
  27. GRB060111B: RTT150, possible host galaxy
  28. GRB 060111B: Refined analysis of the Swift-BAT burst
  29. GRB 060110: MARGE observations
  30. GRB 060111(a): P60 Observations
  31. GRB 060111B: Gualba observatory limit
  32. GRB 060111B: ROTSE-III Detection of Optical Counterpart Flare
  33. GRB 060111: Swift-BAT Refined Analysis
  34. GRB 060108: VLT K-band observations
  35. GRB 060111: TAROT optical observation
  36. GRB 060111: possible UVOT counterpart
  37. GRB060111 : XRT refined analysis
  38. GRB 060111: ROTSE-III Optical Limits
  39. GRB 060110: Mitsume optical observations
  40. GRB 060110: Swift-BAT refined analysis
  41. GRB 060109: Swift-BAT refined analysis
  42. GRB 060108: z-band imaging from Gemini-North
  43. GRB 060110a: RAPTOR detection of early optical emission.
  44. GRB 060110: UKIRT K-band observations
  45. GRB 060110: ROTSE-III Confirmation of Optical Counterpart
  46. GRB 060110: IR Candidate Afterglow
  47. GRB060110, optical observation
  48. GRB 060110: Super-LOTIS observations
  49. GRB 060110: Optical observation
  50. GRB 060110: Correction
  51. Correction to GRB 060109 XRT analysis
  52. GRB 050110: IR Observations
  53. GRB 060110: Optical limit
  54. GRB 060109: Refined Swift-XRT analysis
  55. GRB 060109: Swift/UVOT upper limits
  56. GRB060109, optical observation
  57. GRB 060108: ISAS early observations and near IR upper limit
  58. GRB060108: P200 Ks Observations
  59. GRB 060108: early UKIRT K-band observations
  60. Swift UVOT correction to GCN 4455
  61. GRB 060108: a dark burst?
  62. GRB 060108: Refined XRT analysis
  63. GRB 060108: VLT J-band observations
  64. GRB 060108: Mitsume optical observations
  65. GRB 060108: Swift/UVOT upper limits
  66. GRB 060105: quick look analysis of the Suzaku/XIS afterglow observation
  67. GRB060108: SDSS pre-burst observations
  68. GRB060108: Faulkes Telescope observation
  69. GRB 060108: Refined analysis of the Swift-BAT burst
  70. GRB 060108: Swift XRT position
  71. GRB 060105: Radio observations
  72. GRB 060105: MDM Observation
  73. Konus-Wind observation of GRB 060105
  74. GRB 060105: ISAS observations and near IR upper limit
  75. GRB 060105: Swift/UVOT upper limits
  76. GRB 060105: Mitsume optical observations
  77. GRB 060105: BAT refined analysis
  78. GRB 060102 - no XRT afterglow
  79. GRB 060105: XRT refined analysis
  80. GRB060105: Suzaku-XIS and -HXD observation plan
  81. GRB060105, optical observation
  82. GRB060105: Swift detection of a bright long burst
  83. Swift-BAT trigger 175653 is not an astrophysical source
  84. GRB 060102: MDM Observation
  85. Swift-BAT trigger 175653 is probably not a GRB
  86. GRB 060102: Swift-BAT refined analysis
  87. Time Correction to GRB 060102
  88. GRB 060102: Swift-BAT detection of a burst
  89. GRB051211B: optical observations
  90. GRB051227: SARA Observations
  91. GRB 051221B: Optical Observations with Kuiper 1.54m
  92. GRB 051227: Likely host galaxy underlying afterglow position
  93. GRB 051227: optical observation
  94. GRB051221B: Radio observations
  95. GRB 051221A: VLA Radio Observations
  96. GRB051227: Radio Observations
  97. GRB 051227: Confirmed fading from Gemini observations
  98. GRB051227: further analysis of VLT images
  99. GRB 051227: optical afterglow
  100. GRB 051227: Swift/UVOT Upper Limits (Possible U-band

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