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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"
  1. GRB051117B: Swift XRT refined analysis
  2. GRB051117b: No Swift/UVOT Detection
  3. GRB051111: Rc optical observations: correction
  4. GRB 051117A: Swift/UVOT Detection of an Afterglow: Correction
  5. GRB 051117A: Swift/UVOT Detection of an Afterglow
  6. GRB051111: Suzaku WAM observation of the prompt emission
  7. GRB051111: Rc optical observations
  8. GRB051008: Suzaku WAM observation of the prompt emission
  9. GRB 051109B: GAO 150cm telescope Optical limit
  10. GRB 051109A : GAO 150cm telescope Rc-band detection
  11. GRB 051021 Optical Observations
  12. GRB 051117B: MARGE Optical Limits
  13. GRB 051117A and B: Radio Observations
  14. GRB 051117B: R and I observations of possible host galaxy
  15. GRB 051117b: NIR observations
  16. GRB 051117A: Refined analysis of the Swift-BAT burst
  17. GRB 051117B: Refined analysis of the Swift-BAT burst
  18. GRB051117A : XRT refined analysis
  19. GRB 051117B,optical observation
  20. GRB 051117B: Lulin R and I band observation
  21. GRB 051117B: Optical observations
  22. GRB 051117B: ROTSE-III Optical Limits
  23. GRB051117B: Swift XRT position
  24. GRB 051117B: Swift detection of a burst
  25. GRB 051117: Swift detection of a bright burst
  26. GRB051114: results of the Swift-XRT observation
  27. GRB 051028 Optical Observations
  28. GRB 051109B : Nainital upper limits
  29. GRB 051114: Radio Observations
  30. GRB 051114: Swift-BAT refined analysis
  31. GRB050925: analysis of the XMM-Newton observation
  32. GRB051109A optical observations
  33. GRB 051114: Swift-BAT detection of a short burst
  34. GRB 051111: Further spectroscopic analysis
  35. GRB 051111: Radio afterglow
  36. GRB 051113: Swift-BAT refined analysis
  37. GRB 051113: Swift-BAT detection of a burst
  38. GRB 051111: AEOS optical observations
  39. GRB051103: Radio Observations
  40. GRB 051109A Milagro GeV/TeV Observations
  41. GRB/SGR 050925: XMM-Newton ToO observation
  42. GRB051111: Swift/UVOT Observations
  43. GRB 051111A : R-band temporal decay index based on Lulin
  44. GRB051111: XRT preliminary analysis
  45. GRB 051111: Swift-BAT refined analysis
  46. GRB 051109A Optical Observations
  47. GRB 051111A : Lulin BVRI multi band afterglow observation
  48. GRB051111a: SARA Observations
  49. GRB 051111a: IR photometry
  50. GRB 051111: Keck HIRES redshift
  51. GRB 051111A: KAIT optical observations
  52. GRB 051111a: Afterglow fading in Ic
  53. GRB051111: Super-LOTIS Early Detection
  54. GRB 051111: ROTSE-III Analysis of Prompt Counterpart
  55. Faulkes Telescope R-band detection of GRB051111
  56. GRB 051103 Milagro GeV/TeV Observations
  57. GRB051111: Swift-BAT detection of a bright burst
  58. GRB 051111A: ROTSE-III Detection of Possible Counterpart
  59. GRB 051008 Tautenburg Supernova Search
  60. GRB 051109B. Radio Observations
  61. GRB 051109A
  62. GRB051109A - radio observations
  63. GRB 051105a: GETS optical limit
  64. GRB 051109b: GETS observation
  65. GRB 051109A: KAIT optical observations
  66. Early RAPTOR measurements of GRB 051109a - the movie.
  67. Konus-Wind observation of GRB 051109A
  68. GRB 051109B: Swift-BAT refined analysis
  69. GRB 051109B: ROTSE-III Optical Limits
  70. GRB 051109A: Swift-UVOT Observations
  71. IPN triangulation and Konus spectrum of the short/soft GRB051107 (large
  72. GRB051109B: no UVOT source detected
  73. GRB051109B: XRT refined analysis
  74. GRB 051109B : Lulin Optical Observations
  75. GRB 051109A : Lulin BVRI Optical afterglow observation
  76. GRB051109A: further steepening in the X-ray light curve
  77. GRB051109A: XRT refined analysis
  78. GRB 051109a: BOOTES R & I-band detection of the early afterglow
  79. GRB051109B: XRT position
  80. GRB 051109B: Super-LOTIS Observations
  81. GRB 051109B Kiso optical follow-up observation
  82. GRB051105B: REM Optical observation
  83. GRB 051109B: Swift detection of a burst
  84. GRB 051109: HET Optical Spectrum and Absorption Redshift
  85. GRB 051109: PROMPT Detections
  86. GRB 051109: Rc and Ic observations
  87. GRB051109: Early Super-LOTIS Detection
  88. GRB 051109: Swift-BAT refined analysis
  89. GRB 051109a: IR Photometry and Astrometry
  90. GRB 051109a: MDM Observations
  91. GRB 051109A: ROTSE-III Decline rate for Optical Counterpart
  92. GRB051109: Swift detection of a burst
  93. GRB 051109a: IR Detections
  94. GRB 051109: ROTSE-III Detection of Possible Counterpart
  95. GRB051105B: Swift/XRT upper limit
  96. GRB051105B: Swift/UVOT upper limit
  97. GRB051103: optical observations
  98. GRB 051103, optical observations
  99. GRB051103: MASTER: OT limit and host galaxy candidates
  100. GRB051028: Swift-XRT refined analysis

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