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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.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

42004 results found.

  1. GRB 051109B. Radio Observations
  2. GRB 051109A
  3. GRB051109A - radio observations
  4. GRB 051105a: GETS optical limit
  5. GRB 051109b: GETS observation
  6. GRB 051109A: KAIT optical observations
  7. Early RAPTOR measurements of GRB 051109a - the movie.
  8. Konus-Wind observation of GRB 051109A
  9. GRB 051109B: Swift-BAT refined analysis
  10. GRB 051109B: ROTSE-III Optical Limits
  11. GRB 051109A: Swift-UVOT Observations
  12. IPN triangulation and Konus spectrum of the short/soft GRB051107 (large
  13. GRB051109B: no UVOT source detected
  14. GRB051109B: XRT refined analysis
  15. GRB 051109B : Lulin Optical Observations
  16. GRB 051109A : Lulin BVRI Optical afterglow observation
  17. GRB051109A: further steepening in the X-ray light curve
  18. GRB051109A: XRT refined analysis
  19. GRB 051109a: BOOTES R & I-band detection of the early afterglow
  20. GRB051109B: XRT position
  21. GRB 051109B: Super-LOTIS Observations
  22. GRB 051109B Kiso optical follow-up observation
  23. GRB051105B: REM Optical observation
  24. GRB 051109B: Swift detection of a burst
  25. GRB 051109: HET Optical Spectrum and Absorption Redshift
  26. GRB 051109: PROMPT Detections
  27. GRB 051109: Rc and Ic observations
  28. GRB051109: Early Super-LOTIS Detection
  29. GRB 051109: Swift-BAT refined analysis
  30. GRB 051109a: IR Photometry and Astrometry
  31. GRB 051109a: MDM Observations
  32. GRB 051109A: ROTSE-III Decline rate for Optical Counterpart
  33. GRB051109: Swift detection of a burst
  34. GRB 051109a: IR Detections
  35. GRB 051109: ROTSE-III Detection of Possible Counterpart
  36. GRB051105B: Swift/XRT upper limit
  37. GRB051105B: Swift/UVOT upper limit
  38. GRB051103: optical observations
  39. GRB 051103, optical observations
  40. GRB051103: MASTER: OT limit and host galaxy candidates
  41. GRB051028: Swift-XRT refined analysis
  42. GRB 051105a, observation from Naini Tal and OSN
  43. GRB 051105A, 2nd epoch optical observations
  44. GRB 051105a: MDM Observations
  45. GRB 051105A: TNG optical observations
  46. GRB051105A: Swift/UVOT Observations
  47. GRB 051105A, radio observations
  48. GRB051103:_MASTER_optical_observations
  49. IPN triangulation and Konus spectrum of the bright short/hard GRB051103
  50. GRB 051105A, optical observations
  51. XRT observations of GRB 051105A
  52. GRB 051105: Swift-BAT improved refined analysis
  53. GRB 051105b: ART optical limits
  54. GRB051105B - A long GRB detected by INTEGRAL
  55. GRB 051105B (INTEGRAL 2701): Optical observation
  56. GRB 051105: Swift-BAT refined analysis
  57. GRB 051105: Optical limit
  58. GRB 051105: Swift detection of a short burst
  59. GRB 051016B host spectroscopy and redshift
  60. GRB051016B: optical observation
  61. Recent GRB UBVRcIc field photometry
  62. Konus-Wind observation of GRB 051028
  63. GRB051028:MASTER correction and final results
  64. GRB 051022: RTT150 optical observations
  65. GRB 051021A: RTT150 optical observations
  66. GRB051028 SARA Observation
  67. GRB051028: optical observations
  68. GRB051028: Swift/UVOT upper limits
  69. GRB051028: confirmation of the afterglow
  70. GRB051028: WHT optical candidate
  71. GRB051028: Swift XRT Position
  72. GRB051028:MASTER observations
  73. GRB 051028 (=H3951): A GRB localized by HETE
  74. GRB051028:MASTER optical observations
  75. GRB 051022: XRT Refined Spectral and Temporal Analysis--Correction
  76. GRB051022: Swift XRT measurement of jet break
  77. SGR 1806-20: continued moderate activity seen with INTEGRAL
  78. GRB051021B: Swift/UVOT Upper limits
  79. GRB 051021, Optical Observations
  80. GRB 051022: XRT Refined Spectral and Temporal Analysis
  81. GRB 051022, refined optical astrometry
  82. Chandra Observations of GRB 051022
  83. GRB051012: Swift-XRT analysis
  84. GRB 051022 Chandra Observations scheduled
  85. GRB051021B: Swift XRT refined analysis
  86. GRB051021a: optical observations
  87. GRB 051022: WSRT Radio Detection
  88. GRB 051022, mm counterpart
  89. GRB051022: host galaxy redshift
  90. GRB 051022: Swift/UVOT Upper Limits
  91. GRB051022: Radio Counterpart
  92. GRB051022: IR observations
  93. GRB 051022: SOAR JKs Observations
  94. GRB051021A: Swift XRT refined analysis
  95. Konus-Wind observation of GRB 051022
  96. GRB051022: Optical Observations
  97. GRB 051022: Magellan NIR imaging
  98. GRB 051021: PROMPT RcIc Observations
  99. GRB051021b: Magellan IR Imaging
  100. GRB 051022: Spectral Analysis Indicates That The Spectrum Is Absorbed

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