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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"

36195 results found.

  1. GRB060115: REM observations
  2. GRB 060110: XRT position and analysis
  3. GRB 060116 : Lulin optical limit
  4. GRB 060116: ROTSE-III Optical Limits
  5. GRB060116: XRT position
  6. GRB060116: Faulkes North observation
  7. GRB 060115: absorption redshift
  8. GRB 060116: Swift-BAT detection of a burst
  9. GRB 060115: Refined analysis of the Swift-BAT burst
  10. GRB 060115: OT photometry with MITSuME
  11. GRB 060115: Swift/UVOT upper limits
  12. GRB 060114: REM observations
  13. GRB 060115: Swift XRT refined analysis
  14. GRB 060115: OT finding chart
  15. GRB 060114: Swift/UVOT Observations
  16. GRB 060115: MITSuME optical afterglow candidate
  17. GRB 060115: Swift detection of a burst
  18. GRB 060114: Swift XRT upper limit
  19. GRB 060114: refined position
  20. GRB 060114: A long GRB detected by INTEGRAL
  21. GRB060114: Faulkes North observation
  22. GRB 060108: IR observations of afterglow
  23. GRB060108: Faulkes North afterglow evidence
  24. GRB 060108: further analysis of VLT images
  25. GRB 060108: Evidence for an XRT Position Offset
  26. GRB 060110: KAIT observations
  27. GRB 060111B: Swift XRT refined analysis
  28. GRB 060111A: refined UVOT anaysis
  29. GRB 060111B: MITSuME detection of optical afterglow
  30. GRB 060111B: TAROT optical observation
  31. GRB060111A: RTT150 optical observations
  32. GRB060111B: RTT150, possible host galaxy
  33. GRB 060111B: Refined analysis of the Swift-BAT burst
  34. GRB 060110: MARGE observations
  35. GRB 060111(a): P60 Observations
  36. GRB 060111B: Gualba observatory limit
  37. GRB 060111B: ROTSE-III Detection of Optical Counterpart Flare
  38. GRB 060111B: Swift detection of a burst
  39. GRB 060111: Swift-BAT Refined Analysis
  40. GRB060111.2:_MASTER optical limit
  41. GRB 060108: VLT K-band observations
  42. GRB 060111: TAROT optical observation
  43. GRB 060111: possible UVOT counterpart
  44. GRB 060111: ROTSE-III Optical Limits
  45. GRB 060111: Swift detection of a burst
  46. GRB 060110: Mitsume optical observations
  47. GRB 060110: Swift-BAT refined analysis
  48. GRB 060109: Swift-BAT refined analysis
  49. GRB 060108: z-band imaging from Gemini-North
  50. GRB 060110a: RAPTOR detection of early optical emission.
  51. GRB 060110: UKIRT K-band observations
  52. GRB 060110: ROTSE-III Confirmation of Optical Counterpart
  53. GRB 060110: IR Candidate Afterglow
  54. GRB 060110: Super-LOTIS observations
  55. GRB 060110: Optical observation
  56. GRB 060110: Correction
  57. Correction to GRB 060109 XRT analysis
  58. GRB 050110: IR Observations
  59. GRB 060110: Optical limit
  60. GRB 060110: Swift-BAT detection of a burst
  61. GRB 060109: Refined Swift-XRT analysis
  62. GRB 060109: Swift/UVOT upper limits
  63. GRB060109, optical observation
  64. GRB 060108: ISAS early observations and near IR upper limit
  65. GRB060108: P200 Ks Observations
  66. GRB 060108: early UKIRT K-band observations
  67. Swift UVOT correction to GCN 4455
  68. GRB 060109: Swift Detection of a long burst
  69. GRB 060108: a dark burst?
  70. GRB 060108: Refined XRT analysis
  71. GRB 060108: VLT J-band observations
  72. GRB 060108: Mitsume optical observations
  73. GRB 060108: Swift/UVOT upper limits
  74. GRB 060105: quick look analysis of the Suzaku/XIS afterglow observation
  75. GRB060108: SDSS pre-burst observations
  76. GRB060108: Faulkes Telescope observation
  77. GRB 060108: Refined analysis of the Swift-BAT burst
  78. GRB 060108: Swift XRT position
  79. GRB060108: Swift detection of its 100th GRB
  80. GRB 060105: pseudo-z from spectral parameters of the prompt emission
  81. GRB 060105: Radio observations
  82. GRB 060105: MDM Observation
  83. Konus-Wind observation of GRB 060105
  84. GRB 060105: ISAS observations and near IR upper limit
  85. GRB 060105: Swift/UVOT upper limits
  86. GRB 060105: Mitsume optical observations
  87. GRB 060105: BAT refined analysis
  88. GRB 060102 - no XRT afterglow
  89. GRB 060105: XRT refined analysis
  90. GRB060105: Suzaku-XIS and -HXD observation plan
  91. GRB060105, optical observation
  92. GRB060105 : Kiso optical observation
  93. GRB060105: Swift detection of a bright long burst
  94. Swift-BAT trigger 175653 is not an astrophysical source
  95. GRB 060102: MDM Observation
  96. Swift-BAT trigger 175653 is probably not a GRB
  97. GRB 060102: Swift-BAT refined analysis
  98. Time Correction to GRB 060102
  99. GRB 060102: Swift-BAT detection of a burst
  100. GRB051211B: optical observations

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