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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"

21469 results found.

  1. GRB 051211A: Swift/UVOT upper limits
  2. GRB 051211B: Swift/UVOT upper limits - correction
  3. GRB 051211B: Swift/UVOT upper limits
  4. GRB 051211B: Swift XRT confirmation of the afterglow
  5. GRB051211B: Liverpool Telescope observation
  6. GRB 051211b: RTT150 optical observations
  7. GRB051211b: P60 Observations
  8. GRB 051211B: Swift XRT Observations
  9. GRB 051210: Swift/UVOT upper limits
  10. GRB 051211: Swift XRT upper limit
  11. GRB 051210: Optical imaging from Las Campanas
  12. GRB 051210: SALT detection limit
  13. GRB 051210: BAT further refined analysis of the short burst
  14. GRB 051210: Swift XRT refined analysis
  15. GRB 051210: FRAM early limit
  16. GRB 051210: Swift-BAT refined analysis of a short burst
  17. GRB051210: Swift UVOT Observation
  18. GRB 051210: A short GRB in a cluster?
  19. GRB 051210: Swift detection of a burst
  20. IPN observations of SGR1806-20
  21. Swift XRT positions
  22. An extraordinary long burst on December 3 from SGR1806-20
  23. Swift UVOT Calibration Documentation
  24. GRB051117B: optical observation
  25. Swift-BAT trigger 165579 is not a GRB
  26. GRB 051127: Swift-BAT detection of a possible burst
  27. GRB051117B: Swift XRT refined analysis
  28. GRB051117b: No Swift/UVOT Detection
  29. GRB 051117A: Swift/UVOT Detection of an Afterglow: Correction
  30. GRB 051117A: Swift/UVOT Detection of an Afterglow
  31. GRB051111: Rc optical observations
  32. GRB051008: Suzaku WAM observation of the prompt emission
  33. GRB 051117B: MARGE Optical Limits
  34. GRB 051117A and B: Radio Observations
  35. GRB 051117B: R and I observations of possible host galaxy
  36. GRB 051117b: NIR observations
  37. GRB 051117A: Refined analysis of the Swift-BAT burst
  38. GRB 051117B: Refined analysis of the Swift-BAT burst
  39. GRB051117A : XRT refined analysis
  40. GRB 051117B,optical observation
  41. GRB 051117B: Lulin R and I band observation
  42. GRB 051117B: Optical observations
  43. GRB 051117B: ROTSE-III Optical Limits
  44. GRB051117B: Swift XRT position
  45. GRB 051117B: Swift detection of a burst
  46. GRB 051117: Swift detection of a bright burst
  47. GRB051114: results of the Swift-XRT observation
  48. GRB 051109B : Nainital upper limits
  49. GRB 051114: Swift-BAT refined analysis
  50. GRB050925: analysis of the XMM-Newton observation
  51. GRB 051114: Swift-BAT detection of a short burst
  52. GRB 051113: Swift-BAT refined analysis
  53. GRB 051113: Swift-BAT detection of a burst
  54. GRB 051111: AEOS optical observations
  55. GRB 051109A Milagro GeV/TeV Observations
  56. GRB/SGR 050925: XMM-Newton ToO observation
  57. GRB051111: Swift/UVOT Observations
  58. GRB051111: XRT preliminary analysis
  59. GRB 051111: Swift-BAT refined analysis
  60. GRB 051109A Optical Observations
  61. GRB051111a: SARA Observations
  62. GRB 051111A: KAIT optical observations
  63. GRB051111: Super-LOTIS Early Detection
  64. GRB 051111: ROTSE-III Analysis of Prompt Counterpart
  65. Faulkes Telescope R-band detection of GRB051111
  66. GRB051111: Swift-BAT detection of a bright burst
  67. GRB 051111A: ROTSE-III Detection of Possible Counterpart
  68. GRB 051008 Tautenburg Supernova Search
  69. GRB 051109B. Radio Observations
  70. Early RAPTOR measurements of GRB 051109a - the movie.
  71. Konus-Wind observation of GRB 051109A
  72. GRB 051109B: Swift-BAT refined analysis
  73. GRB 051109B: ROTSE-III Optical Limits
  74. GRB 051109A: Swift-UVOT Observations
  75. IPN triangulation and Konus spectrum of the short/soft GRB051107 (large
  76. GRB051109B: no UVOT source detected
  77. GRB051109B: XRT refined analysis
  78. GRB 051109B : Lulin Optical Observations
  79. GRB051109A: further steepening in the X-ray light curve
  80. GRB051109A: XRT refined analysis
  81. GRB051109B: XRT position
  82. GRB 051109B: Super-LOTIS Observations
  83. GRB 051109B Kiso optical follow-up observation
  84. GRB 051109B: Swift detection of a burst
  85. GRB051109: Early Super-LOTIS Detection
  86. GRB 051109: Swift-BAT refined analysis
  87. GRB 051109a: MDM Observations
  88. GRB 051109A: ROTSE-III Decline rate for Optical Counterpart
  89. GRB051109: Swift detection of a burst
  90. GRB 051109a: IR Detections
  91. GRB 051109: ROTSE-III Detection of Possible Counterpart
  92. GRB051105B: Swift/XRT upper limit
  93. GRB051105B: Swift/UVOT upper limit
  94. GRB051028: Swift-XRT refined analysis
  95. GRB 051105A, 2nd epoch optical observations
  96. GRB 051105a: MDM Observations
  97. GRB 051105A: TNG optical observations
  98. GRB051105A: Swift/UVOT Observations
  99. GRB 051105A, radio observations
  100. IPN triangulation and Konus spectrum of the bright short/hard GRB051103

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