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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"

37226 results found.

  1. GRB 060115: absorption redshift
  2. GRB 060116: Swift-BAT detection of a burst
  3. GRB 060115: Refined analysis of the Swift-BAT burst
  4. GRB 060115: OT photometry with MITSuME
  5. GRB 060115: Swift/UVOT upper limits
  6. GRB 060114: REM observations
  7. GRB 060115: Swift XRT refined analysis
  8. GRB 060115: OT finding chart
  9. GRB 060114: Swift/UVOT Observations
  10. GRB 060115: MITSuME optical afterglow candidate
  11. GRB 060115: Swift detection of a burst
  12. GRB 060114: Swift XRT upper limit
  13. GRB 060114: refined position
  14. GRB 060114: A long GRB detected by INTEGRAL
  15. GRB060114: Faulkes North observation
  16. GRB 060108: IR observations of afterglow
  17. GRB060108: Faulkes North afterglow evidence
  18. GRB 060108: further analysis of VLT images
  19. GRB 060108: Evidence for an XRT Position Offset
  20. GRB 060110: KAIT observations
  21. GRB 060111B: Swift XRT refined analysis
  22. GRB 060111A: refined UVOT anaysis
  23. GRB 060111B: MITSuME detection of optical afterglow
  24. GRB 060111B: TAROT optical observation
  25. GRB060111A: RTT150 optical observations
  26. GRB060111B: RTT150, possible host galaxy
  27. GRB 060111B: Refined analysis of the Swift-BAT burst
  28. GRB 060110: MARGE observations
  29. GRB 060111(a): P60 Observations
  30. GRB 060111B: Gualba observatory limit
  31. GRB 060111B: ROTSE-III Detection of Optical Counterpart Flare
  32. GRB 060111B: Swift detection of a burst
  33. GRB 060111: Swift-BAT Refined Analysis
  34. GRB060111.2:_MASTER optical limit
  35. GRB 060108: VLT K-band observations
  36. GRB 060111: TAROT optical observation
  37. GRB 060111: possible UVOT counterpart
  38. GRB 060111: ROTSE-III Optical Limits
  39. GRB 060111: Swift detection of a burst
  40. GRB 060110: Mitsume optical observations
  41. GRB 060110: Swift-BAT refined analysis
  42. GRB 060109: Swift-BAT refined analysis
  43. GRB 060108: z-band imaging from Gemini-North
  44. GRB 060110a: RAPTOR detection of early optical emission.
  45. GRB 060110: UKIRT K-band observations
  46. GRB 060110: ROTSE-III Confirmation of Optical Counterpart
  47. GRB 060110: IR Candidate Afterglow
  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 060110: Swift-BAT detection of a burst
  55. GRB 060109: Refined Swift-XRT analysis
  56. GRB 060109: Swift/UVOT upper limits
  57. GRB060109, optical observation
  58. GRB 060108: ISAS early observations and near IR upper limit
  59. GRB060108: P200 Ks Observations
  60. GRB 060108: early UKIRT K-band observations
  61. Swift UVOT correction to GCN 4455
  62. GRB 060109: Swift Detection of a long burst
  63. GRB 060108: a dark burst?
  64. GRB 060108: Refined XRT analysis
  65. GRB 060108: VLT J-band observations
  66. GRB 060108: Mitsume optical observations
  67. GRB 060108: Swift/UVOT upper limits
  68. GRB 060105: quick look analysis of the Suzaku/XIS afterglow observation
  69. GRB060108: SDSS pre-burst observations
  70. GRB060108: Faulkes Telescope observation
  71. GRB 060108: Refined analysis of the Swift-BAT burst
  72. GRB 060108: Swift XRT position
  73. GRB060108: Swift detection of its 100th GRB
  74. GRB 060105: pseudo-z from spectral parameters of the prompt emission
  75. GRB 060105: Radio observations
  76. GRB 060105: MDM Observation
  77. Konus-Wind observation of GRB 060105
  78. GRB 060105: ISAS observations and near IR upper limit
  79. GRB 060105: Swift/UVOT upper limits
  80. GRB 060105: Mitsume optical observations
  81. GRB 060105: BAT refined analysis
  82. GRB 060102 - no XRT afterglow
  83. GRB 060105: XRT refined analysis
  84. GRB060105: Suzaku-XIS and -HXD observation plan
  85. GRB060105, optical observation
  86. GRB060105 : Kiso optical observation
  87. GRB060105: Swift detection of a bright long burst
  88. Swift-BAT trigger 175653 is not an astrophysical source
  89. GRB 060102: MDM Observation
  90. Swift-BAT trigger 175653 is probably not a GRB
  91. GRB 060102: Swift-BAT refined analysis
  92. Time Correction to GRB 060102
  93. GRB 060102: Swift-BAT detection of a burst
  94. GRB051211B: optical observations
  95. GRB051227: SARA Observations
  96. GRB 051221B: Optical Observations with Kuiper 1.54m
  97. GRB 051227: Likely host galaxy underlying afterglow position
  98. GRB 051227: optical observation
  99. GRB 051221A: VLA Radio Observations
  100. GRB 051227: Confirmed fading from Gemini observations

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