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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"

36135 results found.

  1. GRB051109A - radio observations
  2. GRB 051105a: GETS optical limit
  3. GRB 051109b: GETS observation
  4. GRB 051109A: KAIT optical observations
  5. Early RAPTOR measurements of GRB 051109a - the movie.
  6. Konus-Wind observation of GRB 051109A
  7. GRB 051109B: Swift-BAT refined analysis
  8. GRB 051109B: ROTSE-III Optical Limits
  9. GRB 051109A: Swift-UVOT Observations
  10. IPN triangulation and Konus spectrum of the short/soft GRB051107 (large
  11. GRB 051109B : Lulin Optical Observations
  12. GRB 051109A : Lulin BVRI Optical afterglow observation
  13. GRB 051109a: BOOTES R & I-band detection of the early afterglow
  14. GRB051109B: XRT position
  15. GRB 051109B: Super-LOTIS Observations
  16. GRB 051109B Kiso optical follow-up observation
  17. GRB 051109B: Swift detection of a burst
  18. GRB 051109: HET Optical Spectrum and Absorption Redshift
  19. GRB 051109: PROMPT Detections
  20. GRB 051109: Rc and Ic observations
  21. GRB 051109: Swift-BAT refined analysis
  22. GRB 051109a: IR Photometry and Astrometry
  23. GRB 051109a: MDM Observations
  24. GRB 051109A: ROTSE-III Decline rate for Optical Counterpart
  25. GRB 051109a: IR Detections
  26. GRB 051109: ROTSE-III Detection of Possible Counterpart
  27. GRB051105B: Swift/XRT upper limit
  28. GRB051105B: Swift/UVOT upper limit
  29. GRB051103: optical observations
  30. GRB 051103, optical observations
  31. GRB051103: MASTER: OT limit and host galaxy candidates
  32. GRB 051105a, observation from Naini Tal and OSN
  33. GRB 051105A, 2nd epoch optical observations
  34. GRB 051105a: MDM Observations
  35. GRB 051105A: TNG optical observations
  36. GRB051105A: Swift/UVOT Observations
  37. GRB 051105A, radio observations
  38. GRB051103:_MASTER_optical_observations
  39. IPN triangulation and Konus spectrum of the bright short/hard GRB051103
  40. GRB 051105A, optical observations
  41. XRT observations of GRB 051105A
  42. GRB 051105: Swift-BAT improved refined analysis
  43. GRB 051105b: ART optical limits
  44. GRB051105B - A long GRB detected by INTEGRAL
  45. GRB 051105B (INTEGRAL 2701): Optical observation
  46. GRB 051105: Swift-BAT refined analysis
  47. GRB 051105: Optical limit
  48. GRB 051105: Swift detection of a short burst
  49. IBAS Alert 2700: Not a GRB
  50. GRB 051016B host spectroscopy and redshift
  51. GRB051016B: optical observation
  52. Recent GRB UBVRcIc field photometry
  53. Konus-Wind observation of GRB 051028
  54. GRB051028:MASTER correction and final results
  55. GRB 051022: RTT150 optical observations
  56. GRB 051021A: RTT150 optical observations
  57. GRB051028 SARA Observation
  58. GRB051028: optical observations
  59. GRB051028: Swift/UVOT upper limits
  60. GRB051028: confirmation of the afterglow
  61. GRB051028: WHT optical candidate
  62. GRB051028: Swift XRT Position
  63. GRB051028:MASTER observations
  64. GRB 051028 (=H3951): A GRB localized by HETE
  65. GRB051028:MASTER optical observations
  66. GRB 051022: XRT Refined Spectral and Temporal Analysis--Correction
  67. GRB051022: Swift XRT measurement of jet break
  68. GRB051021B: Swift/UVOT Upper limits
  69. GRB 051021, Optical Observations
  70. GRB 051022: XRT Refined Spectral and Temporal Analysis
  71. GRB 051022, refined optical astrometry
  72. Chandra Observations of GRB 051022
  73. GRB 051022 Chandra Observations scheduled
  74. GRB051021a: optical observations
  75. GRB 051022: WSRT Radio Detection
  76. GRB 051022, mm counterpart
  77. GRB051022: host galaxy redshift
  78. GRB 051022: Swift/UVOT Upper Limits
  79. GRB051022: Radio Counterpart
  80. GRB 051022: SOAR JKs Observations
  81. Konus-Wind observation of GRB 051022
  82. GRB051022: Optical Observations
  83. GRB 051022: Magellan NIR imaging
  84. GRB 051021: PROMPT RcIc Observations
  85. GRB051021b: Magellan IR Imaging
  86. GRB 051022: Spectral Analysis Indicates That The Spectrum Is Absorbed
  87. GRB 051021: Correction
  88. GRB 051022, J & K-band observation
  89. GRB 051021, SMARTS optical/IR observations
  90. GRB 051021: P200 Ks Observations
  91. IPN triangulation of GRB051022 (=H3950)
  92. GRB 051021: MDM Upper Limit
  93. GRB 051022 (=H3950): SXC Flight Localization is Valid
  94. GRB051021: Swift/UVOT Upper Limits
  95. GRB 051021B: Refined analysis of the Swift-BAT burst
  96. GRB 051022: SSO40 Optical Observations
  97. GRB 051022A: ROTSE-III Optical Limits
  98. GRB051022 (=H3590), A GRB Detected By HETE
  99. GRB 051022: Optical observations
  100. GRB 051021,optical observation

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