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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"

29079 results found.

  1. GRB060108: Faulkes Telescope observation
  2. GRB 060108: Refined analysis of the Swift-BAT burst
  3. GRB 060108: Swift XRT position
  4. GRB060108: Swift detection of its 100th GRB
  5. Konus-Wind observation of GRB 060105
  6. GRB 060105: Swift/UVOT upper limits
  7. GRB 060105: BAT refined analysis
  8. GRB 060102 - no XRT afterglow
  9. GRB060105: Swift detection of a bright long burst
  10. Swift-BAT trigger 175653 is not an astrophysical source
  11. Swift-BAT trigger 175653 is probably not a GRB
  12. GRB 060102: Swift-BAT refined analysis
  13. Time Correction to GRB 060102
  14. GRB 060102: Swift-BAT detection of a burst
  15. GRB051227: SARA Observations
  16. GRB 051221B: Optical Observations with Kuiper 1.54m
  17. GRB 051227: refined analysis of VLT images
  18. GRB 051227: Joint Swift-HETE Spectral Analysis
  19. GRB 051227: XRT refined analysis
  20. GRB 051227: Refined analysis of the Swift-BAT burst
  21. GRB051227: SDSS pre-burst observations
  22. GRB 051227: Swift detection of a burst
  23. GRB051117B: optical observation
  24. Konus-Wind observation of GRB 051221A
  25. GRB 051221A: MDM Optical Observations
  26. GRB 051221B: ROTSE-III Optical Limits
  27. GRB 051221B: Refined analysis of the Swift-BAT burst
  28. Possible GRB 051221B: MDM Optical Detection
  29. GRB 051221A: RAPTOR Fading Counterpart Constraint
  30. GRB 051221B: BOOTES optical observations.
  31. Possible GRB 051221B: Swift XRT position
  32. Swift-BAT detection of a possible burst
  33. GRB 051221: Swift XRT refined analysis
  34. GRB 051221: Swift/UVOT upper limits
  35. GRB 051221: Refined analysis of the Swift-BAT short hard burst
  36. GRB 051221: Swift detection of a bright short burst
  37. Refined analysis of the SWIFT J1626.6-5156
  38. Swift-BAT discovery of hard x-ray transient SWIFT J1626.6-5156
  39. Refined analysis of the Swift-BAT detection of the RS CVn star II Peg
  40. GRB051211A (=H3979): Refined Analysis
  41. Swift detection of an RS CVn flare star
  42. Swift Trigger 172767 is not a GRB
  43. GRB 051215: near-infrared observations
  44. GRB 051215: Swift detection of a possible burst
  45. GRB 051215: A short GRB in a cluster?
  46. GRB 051213: Swift-BAT refined analysis
  47. GRB051211B: XRT refined analysis
  48. GRB 051213: Swift-BAT detection of a burst
  49. GRB 051211A: Swift/UVOT upper limits
  50. GRB 051211B: Swift/UVOT upper limits
  51. GRB051211B: Liverpool Telescope observation
  52. GRB 051211A and GRB051211B: BOOTES simultaneous observations
  53. GRB 051210: Swift/UVOT upper limits
  54. HETE SXC localization of GRB 051211 (=H3979)
  55. GRB 051210: Swift XRT refined analysis
  56. GRB 051210: Swift-BAT refined analysis of a short burst
  57. GRB051210: Swift UVOT Observation
  58. GRB 051210: Swift detection of a burst
  59. Possible resuming of the SGR 1806-20 activity
  60. Swift-BAT trigger 165579 is not a GRB
  61. GRB 051127: Swift-BAT detection of a possible burst
  62. GRB051117b: No Swift/UVOT Detection
  63. GRB 051117A: Swift/UVOT Detection of an Afterglow
  64. GRB051111: Rc optical observations
  65. GRB051008: Suzaku WAM observation of the prompt emission
  66. GRB 051021 Optical Observations
  67. GRB 051117B: MARGE Optical Limits
  68. GRB 051117A: Refined analysis of the Swift-BAT burst
  69. GRB 051117B: Refined analysis of the Swift-BAT burst
  70. GRB051117A : XRT refined analysis
  71. GRB 051117B,optical observation
  72. GRB 051117B: ROTSE-III Optical Limits
  73. GRB 051117B: Swift detection of a burst
  74. GRB 051117: Swift detection of a bright burst
  75. GRB051114: results of the Swift-XRT observation
  76. GRB 051028 Optical Observations
  77. GRB 051114: Swift-BAT refined analysis
  78. GRB 051114: Swift-BAT detection of a short burst
  79. GRB 051113: Swift-BAT refined analysis
  80. GRB 051113: Swift-BAT detection of a burst
  81. GRB 051111: AEOS optical observations
  82. GRB051111: Swift/UVOT Observations
  83. GRB 051111: Swift-BAT refined analysis
  84. GRB 051109A Optical Observations
  85. GRB051111a: SARA Observations
  86. GRB 051111A: KAIT optical observations
  87. GRB051111: Super-LOTIS Early Detection
  88. GRB 051111: ROTSE-III Analysis of Prompt Counterpart
  89. Faulkes Telescope R-band detection of GRB051111
  90. GRB051111: Swift-BAT detection of a bright burst
  91. GRB 051111A: ROTSE-III Detection of Possible Counterpart
  92. GRB 051105a: GETS optical limit
  93. GRB 051109b: GETS observation
  94. Early RAPTOR measurements of GRB 051109a - the movie.
  95. Konus-Wind observation of GRB 051109A
  96. GRB 051109B: Swift-BAT refined analysis
  97. GRB 051109B: ROTSE-III Optical Limits
  98. GRB 051109A: Swift-UVOT Observations
  99. GRB051109B: no UVOT source detected
  100. GRB 051109a: BOOTES R & I-band detection of the early afterglow

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