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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"

43001 results found.

  1. GRB051117A : XRT refined analysis
  2. GRB 051117B: Lulin R and I band observation
  3. GRB 051117B: Optical observations
  4. GRB 051117B: ROTSE-III Optical Limits
  5. GRB051117B: Swift XRT position
  6. GRB 051117B: Swift detection of a burst
  7. GRB 051117: Swift detection of a bright burst
  8. GRB051114: results of the Swift-XRT observation
  9. GRB 051028 Optical Observations
  10. GRB 051109B : Nainital upper limits
  11. GRB 051114: Swift-BAT refined analysis
  12. GRB050925: analysis of the XMM-Newton observation
  13. GRB051109A optical observations
  14. GRB 051114: Swift-BAT detection of a short burst
  15. GRB 051111: Further spectroscopic analysis
  16. GRB 051113: Swift-BAT refined analysis
  17. GRB 051113: Swift-BAT detection of a burst
  18. GRB 051111: AEOS optical observations
  19. GRB051103: Radio Observations
  20. GRB 051109A Milagro GeV/TeV Observations
  21. GRB/SGR 050925: XMM-Newton ToO observation
  22. GRB051111: Swift/UVOT Observations
  23. GRB 051111A : R-band temporal decay index based on Lulin
  24. GRB051111: XRT preliminary analysis
  25. GRB 051111: Swift-BAT refined analysis
  26. GRB 051109A Optical Observations
  27. GRB 051111A : Lulin BVRI multi band afterglow observation
  28. GRB051111a: SARA Observations
  29. GRB 051111a: IR photometry
  30. GRB 051111: Keck HIRES redshift
  31. GRB 051111A: KAIT optical observations
  32. GRB 051111a: Afterglow fading in Ic
  33. GRB051111: Super-LOTIS Early Detection
  34. Faulkes Telescope R-band detection of GRB051111
  35. GRB 051103 Milagro GeV/TeV Observations
  36. GRB051111: Swift-BAT detection of a bright burst
  37. GRB 051008 Tautenburg Supernova Search
  38. GRB 051109B. Radio Observations
  39. GRB 051109A
  40. GRB 051105a: GETS optical limit
  41. GRB 051109b: GETS observation
  42. GRB 051109A: KAIT optical observations
  43. Early RAPTOR measurements of GRB 051109a - the movie.
  44. Konus-Wind observation of GRB 051109A
  45. GRB 051109B: ROTSE-III Optical Limits
  46. GRB 051109A: Swift-UVOT Observations
  47. IPN triangulation and Konus spectrum of the short/soft GRB051107 (large
  48. GRB051109B: no UVOT source detected
  49. GRB051109B: XRT refined analysis
  50. GRB 051109B : Lulin Optical Observations
  51. GRB051109A: further steepening in the X-ray light curve
  52. GRB051109A: XRT refined analysis
  53. GRB 051109a: BOOTES R & I-band detection of the early afterglow
  54. GRB051109B: XRT position
  55. GRB 051109B Kiso optical follow-up observation
  56. GRB051105B: REM Optical observation
  57. GRB 051109B: Swift detection of a burst
  58. GRB 051109: HET Optical Spectrum and Absorption Redshift
  59. GRB 051109: PROMPT Detections
  60. GRB 051109: Rc and Ic observations
  61. GRB051109: Early Super-LOTIS Detection
  62. GRB 051109a: IR Photometry and Astrometry
  63. GRB 051109a: MDM Observations
  64. GRB 051109A: ROTSE-III Decline rate for Optical Counterpart
  65. GRB051109: Swift detection of a burst
  66. GRB 051109a: IR Detections
  67. GRB051105B: Swift/XRT upper limit
  68. GRB051103: optical observations
  69. GRB 051103, optical observations
  70. GRB051103: MASTER: OT limit and host galaxy candidates
  71. GRB051028: Swift-XRT refined analysis
  72. GRB 051105a, observation from Naini Tal and OSN
  73. GRB 051105A, 2nd epoch optical observations
  74. GRB 051105a: MDM Observations
  75. GRB 051105A: TNG optical observations
  76. GRB051105A: Swift/UVOT Observations
  77. GRB 051105A, radio observations
  78. IPN triangulation and Konus spectrum of the bright short/hard GRB051103
  79. GRB 051105A, optical observations
  80. XRT observations of GRB 051105A
  81. GRB 051105: Swift-BAT improved refined analysis
  82. GRB 051105b: ART optical limits
  83. GRB051105B - A long GRB detected by INTEGRAL
  84. GRB 051105B (INTEGRAL 2701): Optical observation
  85. GRB 051105: Swift-BAT refined analysis
  86. GRB 051105: Optical limit
  87. GRB 051105: Swift detection of a short burst
  88. IBAS Alert 2700: Not a GRB
  89. GRB 051016B host spectroscopy and redshift
  90. GRB051016B: optical observation
  91. Recent GRB UBVRcIc field photometry
  92. Konus-Wind observation of GRB 051028
  93. GRB051028:MASTER correction and final results
  94. GRB 051022: RTT150 optical observations
  95. GRB051028 SARA Observation
  96. GRB051028: optical observations
  97. GRB051028: Swift/UVOT upper limits
  98. GRB051028: confirmation of the afterglow
  99. GRB051028: WHT optical candidate
  100. GRB051028: Swift XRT Position

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