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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"

45779 results found.

  1. GRB051211B: XRT refined analysis
  2. GRB 051211B, optical observation
  3. GRB 051213: Swift-BAT detection of a burst
  4. GRB 051211a: RTT150 optical observations
  5. GRB051211B, RBO optical observations
  6. GRB 051211A: Swift/UVOT upper limits
  7. GRB 051211B: Swift/UVOT upper limits
  8. GRB 051211A,optical observation
  9. GRB 051211B: Swift XRT confirmation of the afterglow
  10. GRB051211B: Liverpool Telescope observation
  11. GRB 051211b: RTT150 optical observations
  12. GRB051211b: P60 Observations
  13. GRB 051211A and GRB051211B: BOOTES simultaneous observations
  14. GRB 051211B: Swift XRT Observations
  15. GRB 051210: Swift/UVOT upper limits
  16. GRB 051210: Magellan Imaging
  17. GRB 051211: TAROT optical limits
  18. GRB 051211B: a possible optical detection by TAROT
  19. GRB 051211B: a long GRB detected by INTEGRAL
  20. GRB 051211: Swift XRT upper limit
  21. GRB 051211:IAC80 optical observations
  22. HETE SXC localization of GRB 051211 (=H3979)
  23. GRB 051210: Optical imaging from Las Campanas
  24. GRB 051210: SALT detection limit
  25. GRB 051210: BAT further refined analysis of the short burst
  26. GRB 051210: Swift XRT refined analysis
  27. GRB 051210: Swift-BAT refined analysis of a short burst
  28. GRB051210: Swift UVOT Observation
  29. GRB 051210: A short GRB in a cluster?
  30. GRB 051210: Swift detection of a burst
  31. IPN observations of SGR1806-20
  32. Swift XRT positions
  33. An extraordinary long burst on December 3 from SGR1806-20
  34. IBAS Alert 2706 : not a real GRB
  35. Possible resuming of the SGR 1806-20 activity
  36. Swift UVOT Calibration Documentation
  37. GRB051117B: optical observation
  38. GRB051111: optical observaion
  39. Swift-BAT trigger 165579 is not a GRB
  40. GRB 051127: Swift-BAT detection of a possible burst
  41. GRB051117B: Swift XRT refined analysis
  42. GRB051117b: No Swift/UVOT Detection
  43. GRB 051117A: Swift/UVOT Detection of an Afterglow: Correction
  44. GRB 051117A: Swift/UVOT Detection of an Afterglow
  45. GRB051111: Suzaku WAM observation of the prompt emission
  46. GRB051111: Rc optical observations
  47. GRB051008: Suzaku WAM observation of the prompt emission
  48. GRB 051109B: GAO 150cm telescope Optical limit
  49. GRB 051109A : GAO 150cm telescope Rc-band detection
  50. GRB 051021 Optical Observations
  51. GRB 051117B: MARGE Optical Limits
  52. GRB 051117A and B: Radio Observations
  53. GRB 051117B: R and I observations of possible host galaxy
  54. GRB 051117b: NIR observations
  55. GRB 051117A: Refined analysis of the Swift-BAT burst
  56. GRB 051117B: Refined analysis of the Swift-BAT burst
  57. GRB051117A : XRT refined analysis
  58. GRB 051117B,optical observation
  59. GRB 051117B: Lulin R and I band observation
  60. GRB 051117B: Optical observations
  61. GRB 051117B: ROTSE-III Optical Limits
  62. GRB051117B: Swift XRT position
  63. GRB 051117B: Swift detection of a burst
  64. GRB 051117: Swift detection of a bright burst
  65. GRB051114: results of the Swift-XRT observation
  66. GRB 051028 Optical Observations
  67. GRB 051109B : Nainital upper limits
  68. GRB 051114: Radio Observations
  69. GRB 051114: Swift-BAT refined analysis
  70. GRB050925: analysis of the XMM-Newton observation
  71. GRB051109A optical observations
  72. GRB 051114: Swift-BAT detection of a short burst
  73. GRB 051111: Further spectroscopic analysis
  74. GRB 051111: Radio afterglow
  75. GRB 051113: Swift-BAT refined analysis
  76. GRB 051113: Swift-BAT detection of a burst
  77. GRB 051111: AEOS optical observations
  78. GRB051103: Radio Observations
  79. GRB 051109A Milagro GeV/TeV Observations
  80. GRB/SGR 050925: XMM-Newton ToO observation
  81. GRB051111: Swift/UVOT Observations
  82. GRB 051111A : R-band temporal decay index based on Lulin
  83. GRB051111: XRT preliminary analysis
  84. GRB 051111: Swift-BAT refined analysis
  85. GRB 051109A Optical Observations
  86. GRB 051111A : Lulin BVRI multi band afterglow observation
  87. GRB051111a: SARA Observations
  88. GRB 051111a: IR photometry
  89. GRB 051111: Keck HIRES redshift
  90. GRB 051111A: KAIT optical observations
  91. GRB 051111a: Afterglow fading in Ic
  92. GRB051111: Super-LOTIS Early Detection
  93. GRB 051111: ROTSE-III Analysis of Prompt Counterpart
  94. Faulkes Telescope R-band detection of GRB051111
  95. GRB 051103 Milagro GeV/TeV Observations
  96. GRB051111: Swift-BAT detection of a bright burst
  97. GRB 051111A: ROTSE-III Detection of Possible Counterpart
  98. GRB 051008 Tautenburg Supernova Search
  99. GRB 051109B. Radio Observations
  100. GRB 051109A

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