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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"

37694 results found.

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

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