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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"

32735 results found.

  1. GRB 051109B : Nainital upper limits
  2. GRB 051114: Radio Observations
  3. GRB 051114: Swift-BAT refined analysis
  4. GRB 051114: Swift-BAT detection of a short burst
  5. GRB 051111: Further spectroscopic analysis
  6. GRB 051111: Radio afterglow
  7. GRB 051113: Swift-BAT refined analysis
  8. GRB051103: Radio Observations
  9. GRB 051109A Milagro GeV/TeV Observations
  10. GRB/SGR 050925: XMM-Newton ToO observation
  11. GRB051111: Swift/UVOT Observations
  12. GRB 051111A : R-band temporal decay index based on Lulin
  13. GRB051111: XRT preliminary analysis
  14. GRB 051111: Swift-BAT refined analysis
  15. GRB 051109A Optical Observations
  16. GRB051111a: SARA Observations
  17. GRB 051111a: IR photometry
  18. GRB 051111A: KAIT optical observations
  19. GRB 051111a: Afterglow fading in Ic
  20. GRB051111: Super-LOTIS Early Detection
  21. GRB 051111: ROTSE-III Analysis of Prompt Counterpart
  22. GRB 051103 Milagro GeV/TeV Observations
  23. GRB 051111A: ROTSE-III Detection of Possible Counterpart
  24. GRB 051008 Tautenburg Supernova Search
  25. GRB 051109B. Radio Observations
  26. GRB 051109A
  27. GRB051109A - radio observations
  28. GRB 051105a: GETS optical limit
  29. GRB 051109b: GETS observation
  30. GRB 051109A: KAIT optical observations
  31. Early RAPTOR measurements of GRB 051109a - the movie.
  32. Konus-Wind observation of GRB 051109A
  33. GRB 051109B: Swift-BAT refined analysis
  34. GRB 051109B: ROTSE-III Optical Limits
  35. GRB 051109A: Swift-UVOT Observations
  36. GRB051109B: no UVOT source detected
  37. GRB051109B: XRT refined analysis
  38. GRB 051109B : Lulin Optical Observations
  39. GRB051109A: further steepening in the X-ray light curve
  40. GRB051109A: XRT refined analysis
  41. GRB 051109a: BOOTES R & I-band detection of the early afterglow
  42. GRB051109B: XRT position
  43. GRB 051109B Kiso optical follow-up observation
  44. GRB 051109: HET Optical Spectrum and Absorption Redshift
  45. GRB 051109: PROMPT Detections
  46. GRB 051109: Rc and Ic observations
  47. GRB051109: Early Super-LOTIS Detection
  48. GRB 051109: Swift-BAT refined analysis
  49. GRB 051109a: MDM Observations
  50. GRB 051109A: ROTSE-III Decline rate for Optical Counterpart
  51. GRB051109: Swift detection of a burst
  52. GRB 051109a: IR Detections
  53. GRB 051109: ROTSE-III Detection of Possible Counterpart
  54. GRB051105B: Swift/XRT upper limit
  55. GRB051105B: Swift/UVOT upper limit
  56. GRB051103: optical observations
  57. GRB 051103, optical observations
  58. GRB051103: MASTER: OT limit and host galaxy candidates
  59. GRB051028: Swift-XRT refined analysis
  60. GRB 051105a, observation from Naini Tal and OSN
  61. GRB 051105A, 2nd epoch optical observations
  62. GRB 051105a: MDM Observations
  63. GRB 051105A: TNG optical observations
  64. GRB051105A: Swift/UVOT Observations
  65. GRB 051105A, radio observations
  66. GRB051103:_MASTER_optical_observations
  67. GRB 051105A, optical observations
  68. XRT observations of GRB 051105A
  69. GRB 051105: Swift-BAT improved refined analysis
  70. GRB 051105: Swift-BAT refined analysis
  71. GRB 051105: Optical limit
  72. GRB 051016B host spectroscopy and redshift
  73. GRB051016B: optical observation
  74. Konus-Wind observation of GRB 051028
  75. GRB051028:MASTER correction and final results
  76. GRB 051022: RTT150 optical observations
  77. GRB 051021A: RTT150 optical observations
  78. GRB051028 SARA Observation
  79. GRB051028: optical observations
  80. GRB051028: Swift/UVOT upper limits
  81. GRB051028: WHT optical candidate
  82. GRB051028: Swift XRT Position
  83. GRB051028:MASTER observations
  84. GRB 051022: XRT Refined Spectral and Temporal Analysis--Correction
  85. GRB051022: Swift XRT measurement of jet break
  86. GRB051021B: Swift/UVOT Upper limits
  87. GRB 051022: XRT Refined Spectral and Temporal Analysis
  88. GRB 051022, refined optical astrometry
  89. Chandra Observations of GRB 051022
  90. GRB051012: Swift-XRT analysis
  91. GRB051021B: Swift XRT refined analysis
  92. GRB051021a: optical observations
  93. GRB 051022: WSRT Radio Detection
  94. GRB 051022, mm counterpart
  95. GRB051022: host galaxy redshift
  96. GRB 051022: Swift/UVOT Upper Limits
  97. GRB051022: Radio Counterpart
  98. GRB051022: IR observations
  99. GRB 051022: SOAR JKs Observations
  100. GRB051021A: Swift XRT refined analysis

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