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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"

26558 results found.

  1. GRB051210: Swift UVOT Observation
  2. GRB 051210: Swift detection of a burst
  3. Swift XRT positions
  4. An extraordinary long burst on December 3 from SGR1806-20
  5. GRB 051127: Swift-BAT detection of a possible burst
  6. GRB051117B: Swift XRT refined analysis
  7. GRB051117b: No Swift/UVOT Detection
  8. GRB 051117A: Swift/UVOT Detection of an Afterglow
  9. GRB051008: Suzaku WAM observation of the prompt emission
  10. GRB 051021 Optical Observations
  11. GRB 051117B: R and I observations of possible host galaxy
  12. GRB 051117A: Refined analysis of the Swift-BAT burst
  13. GRB 051117B: Refined analysis of the Swift-BAT burst
  14. GRB051117A : XRT refined analysis
  15. GRB 051117B,optical observation
  16. GRB 051117B: Swift detection of a burst
  17. GRB 051117: Swift detection of a bright burst
  18. GRB051114: results of the Swift-XRT observation
  19. GRB 051028 Optical Observations
  20. GRB 051109B : Nainital upper limits
  21. GRB 051114: Radio Observations
  22. GRB 051114: Swift-BAT refined analysis
  23. GRB050925: analysis of the XMM-Newton observation
  24. GRB 051114: Swift-BAT detection of a short burst
  25. GRB 051111: Further spectroscopic analysis
  26. GRB 051111: Radio afterglow
  27. GRB 051113: Swift-BAT refined analysis
  28. GRB 051113: Swift-BAT detection of a burst
  29. GRB051103: Radio Observations
  30. GRB 051109A Milagro GeV/TeV Observations
  31. GRB/SGR 050925: XMM-Newton ToO observation
  32. GRB051111: Swift/UVOT Observations
  33. GRB051111: XRT preliminary analysis
  34. GRB 051109A Optical Observations
  35. GRB 051111a: IR photometry
  36. Faulkes Telescope R-band detection of GRB051111
  37. GRB 051103 Milagro GeV/TeV Observations
  38. GRB 051109B. Radio Observations
  39. GRB 051109A
  40. GRB051109A - radio observations
  41. Konus-Wind observation of GRB 051109A
  42. GRB 051109A: Swift-UVOT Observations
  43. IPN triangulation and Konus spectrum of the short/soft GRB051107 (large
  44. GRB051109B: no UVOT source detected
  45. GRB051109B: XRT refined analysis
  46. GRB051109A: further steepening in the X-ray light curve
  47. GRB051109A: XRT refined analysis
  48. GRB 051109B: Super-LOTIS Observations
  49. GRB051105B: REM Optical observation
  50. GRB 051109: Rc and Ic observations
  51. GRB 051109: Swift-BAT refined analysis
  52. GRB 051109a: IR Photometry and Astrometry
  53. GRB051109: Swift detection of a burst
  54. GRB 051109a: IR Detections
  55. GRB051105B: Swift/XRT upper limit
  56. GRB051105B: Swift/UVOT upper limit
  57. GRB051103: MASTER: OT limit and host galaxy candidates
  58. GRB051028: Swift-XRT refined analysis
  59. GRB 051105a, observation from Naini Tal and OSN
  60. GRB 051105a: MDM Observations
  61. GRB 051105A: TNG optical observations
  62. GRB051105A: Swift/UVOT Observations
  63. GRB 051105A, radio observations
  64. GRB051103:_MASTER_optical_observations
  65. IPN triangulation and Konus spectrum of the bright short/hard GRB051103
  66. XRT observations of GRB 051105A
  67. GRB 051105b: ART optical limits
  68. GRB051105B - A long GRB detected by INTEGRAL
  69. GRB 051105B (INTEGRAL 2701): Optical observation
  70. GRB 051105: Swift detection of a short burst
  71. Recent GRB UBVRcIc field photometry
  72. Konus-Wind observation of GRB 051028
  73. GRB051028 SARA Observation
  74. GRB051028: Swift/UVOT upper limits
  75. GRB051028: Swift XRT Position
  76. GRB 051028 (=H3951): A GRB localized by HETE
  77. GRB051022: Swift XRT measurement of jet break
  78. SGR 1806-20: continued moderate activity seen with INTEGRAL
  79. GRB051021B: Swift/UVOT Upper limits
  80. GRB 051021, Optical Observations
  81. GRB 051022: XRT Refined Spectral and Temporal Analysis
  82. GRB051012: Swift-XRT analysis
  83. GRB 051022 Chandra Observations scheduled
  84. GRB051021B: Swift XRT refined analysis
  85. GRB051021a: optical observations
  86. GRB 051022, mm counterpart
  87. GRB 051022: Swift/UVOT Upper Limits
  88. GRB051022: Radio Counterpart
  89. GRB051022: IR observations
  90. GRB051021A: Swift XRT refined analysis
  91. Konus-Wind observation of GRB 051022
  92. GRB051022: Optical Observations
  93. GRB051021b: Magellan IR Imaging
  94. GRB 051022: Spectral Analysis Indicates That The Spectrum Is Absorbed
  95. GRB 051022, J & K-band observation
  96. GRB051022: Swift XRT Position
  97. GRB 051021: P200 Ks Observations
  98. GRB 051022 (=H3950): SXC Flight Localization is Valid
  99. GRB051021: Swift/UVOT Upper Limits
  100. GRB 051021B: Refined analysis of the Swift-BAT burst

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