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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"

32748 results found.

  1. GRB 051021 Optical Observations
  2. GRB 051117B: MARGE Optical Limits
  3. GRB 051117A and B: Radio Observations
  4. GRB 051117B: R and I observations of possible host galaxy
  5. GRB 051117b: NIR observations
  6. GRB 051117A: Refined analysis of the Swift-BAT burst
  7. GRB 051117B: Refined analysis of the Swift-BAT burst
  8. GRB051117A : XRT refined analysis
  9. GRB 051117B: Lulin R and I band observation
  10. GRB 051117B: Optical observations
  11. GRB 051117B: ROTSE-III Optical Limits
  12. GRB051114: results of the Swift-XRT observation
  13. GRB 051028 Optical Observations
  14. GRB 051109B : Nainital upper limits
  15. GRB 051114: Radio Observations
  16. GRB 051114: Swift-BAT refined analysis
  17. GRB 051114: Swift-BAT detection of a short burst
  18. GRB 051111: Further spectroscopic analysis
  19. GRB 051111: Radio afterglow
  20. GRB 051113: Swift-BAT refined analysis
  21. GRB051103: Radio Observations
  22. GRB 051109A Milagro GeV/TeV Observations
  23. GRB/SGR 050925: XMM-Newton ToO observation
  24. GRB051111: Swift/UVOT Observations
  25. GRB 051111A : R-band temporal decay index based on Lulin
  26. GRB051111: XRT preliminary analysis
  27. GRB 051111: Swift-BAT refined analysis
  28. GRB 051109A Optical Observations
  29. GRB051111a: SARA Observations
  30. GRB 051111a: IR photometry
  31. GRB 051111A: KAIT optical observations
  32. GRB 051111a: Afterglow fading in Ic
  33. GRB051111: Super-LOTIS Early Detection
  34. GRB 051111: ROTSE-III Analysis of Prompt Counterpart
  35. GRB 051103 Milagro GeV/TeV Observations
  36. GRB 051111A: ROTSE-III Detection of Possible Counterpart
  37. GRB 051008 Tautenburg Supernova Search
  38. GRB 051109B. Radio Observations
  39. GRB 051109A
  40. GRB051109A - radio observations
  41. GRB 051105a: GETS optical limit
  42. GRB 051109b: GETS observation
  43. GRB 051109A: KAIT optical observations
  44. Early RAPTOR measurements of GRB 051109a - the movie.
  45. Konus-Wind observation of GRB 051109A
  46. GRB 051109B: Swift-BAT refined analysis
  47. GRB 051109B: ROTSE-III Optical Limits
  48. GRB 051109A: Swift-UVOT Observations
  49. GRB051109B: no UVOT source detected
  50. GRB051109B: XRT refined analysis
  51. GRB 051109B : Lulin Optical Observations
  52. GRB051109A: further steepening in the X-ray light curve
  53. GRB051109A: XRT refined analysis
  54. GRB 051109a: BOOTES R & I-band detection of the early afterglow
  55. GRB051109B: XRT position
  56. GRB 051109B Kiso optical follow-up observation
  57. GRB 051109: HET Optical Spectrum and Absorption Redshift
  58. GRB 051109: PROMPT Detections
  59. GRB 051109: Rc and Ic observations
  60. GRB051109: Early Super-LOTIS Detection
  61. GRB 051109: Swift-BAT refined analysis
  62. GRB 051109a: MDM Observations
  63. GRB 051109A: ROTSE-III Decline rate for Optical Counterpart
  64. GRB051109: Swift detection of a burst
  65. GRB 051109a: IR Detections
  66. GRB 051109: ROTSE-III Detection of Possible Counterpart
  67. GRB051105B: Swift/XRT upper limit
  68. GRB051105B: Swift/UVOT upper limit
  69. GRB051103: optical observations
  70. GRB 051103, optical observations
  71. GRB051103: MASTER: OT limit and host galaxy candidates
  72. GRB051028: Swift-XRT refined analysis
  73. GRB 051105a, observation from Naini Tal and OSN
  74. GRB 051105A, 2nd epoch optical observations
  75. GRB 051105a: MDM Observations
  76. GRB 051105A: TNG optical observations
  77. GRB051105A: Swift/UVOT Observations
  78. GRB 051105A, radio observations
  79. GRB051103:_MASTER_optical_observations
  80. GRB 051105A, optical observations
  81. XRT observations of GRB 051105A
  82. GRB 051105: Swift-BAT improved refined analysis
  83. GRB 051105: Swift-BAT refined analysis
  84. GRB 051105: Optical limit
  85. GRB 051016B host spectroscopy and redshift
  86. GRB051016B: optical observation
  87. Konus-Wind observation of GRB 051028
  88. GRB051028:MASTER correction and final results
  89. GRB 051022: RTT150 optical observations
  90. GRB 051021A: RTT150 optical observations
  91. GRB051028 SARA Observation
  92. GRB051028: optical observations
  93. GRB051028: Swift/UVOT upper limits
  94. GRB051028: WHT optical candidate
  95. GRB051028: Swift XRT Position
  96. GRB051028:MASTER observations
  97. GRB 051022: XRT Refined Spectral and Temporal Analysis--Correction
  98. GRB051022: Swift XRT measurement of jet break
  99. GRB051021B: Swift/UVOT Upper limits
  100. GRB 051022: XRT Refined Spectral and Temporal Analysis

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