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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"

38673 results found.

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

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