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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"

38670 results found.

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

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