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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"

32722 results found.

  1. GRB 051111: Swift-BAT refined analysis
  2. GRB 051109A Optical Observations
  3. GRB051111a: SARA Observations
  4. GRB 051111a: IR photometry
  5. GRB 051111A: KAIT optical observations
  6. GRB 051111a: Afterglow fading in Ic
  7. GRB051111: Super-LOTIS Early Detection
  8. GRB 051111: ROTSE-III Analysis of Prompt Counterpart
  9. GRB 051103 Milagro GeV/TeV Observations
  10. GRB 051111A: ROTSE-III Detection of Possible Counterpart
  11. GRB 051008 Tautenburg Supernova Search
  12. GRB 051109B. Radio Observations
  13. GRB 051109A
  14. GRB051109A - radio observations
  15. GRB 051105a: GETS optical limit
  16. GRB 051109b: GETS observation
  17. GRB 051109A: KAIT optical observations
  18. Early RAPTOR measurements of GRB 051109a - the movie.
  19. Konus-Wind observation of GRB 051109A
  20. GRB 051109B: Swift-BAT refined analysis
  21. GRB 051109B: ROTSE-III Optical Limits
  22. GRB 051109A: Swift-UVOT Observations
  23. GRB051109B: no UVOT source detected
  24. GRB051109B: XRT refined analysis
  25. GRB 051109B : Lulin Optical Observations
  26. GRB051109A: further steepening in the X-ray light curve
  27. GRB051109A: XRT refined analysis
  28. GRB 051109a: BOOTES R & I-band detection of the early afterglow
  29. GRB051109B: XRT position
  30. GRB 051109B Kiso optical follow-up observation
  31. GRB 051109: HET Optical Spectrum and Absorption Redshift
  32. GRB 051109: PROMPT Detections
  33. GRB 051109: Rc and Ic observations
  34. GRB051109: Early Super-LOTIS Detection
  35. GRB 051109: Swift-BAT refined analysis
  36. GRB 051109a: MDM Observations
  37. GRB 051109A: ROTSE-III Decline rate for Optical Counterpart
  38. GRB051109: Swift detection of a burst
  39. GRB 051109a: IR Detections
  40. GRB 051109: ROTSE-III Detection of Possible Counterpart
  41. GRB051105B: Swift/XRT upper limit
  42. GRB051105B: Swift/UVOT upper limit
  43. GRB051103: optical observations
  44. GRB 051103, optical observations
  45. GRB051103: MASTER: OT limit and host galaxy candidates
  46. GRB051028: Swift-XRT refined analysis
  47. GRB 051105a, observation from Naini Tal and OSN
  48. GRB 051105A, 2nd epoch optical observations
  49. GRB 051105a: MDM Observations
  50. GRB 051105A: TNG optical observations
  51. GRB051105A: Swift/UVOT Observations
  52. GRB 051105A, radio observations
  53. GRB051103:_MASTER_optical_observations
  54. GRB 051105A, optical observations
  55. XRT observations of GRB 051105A
  56. GRB 051105: Swift-BAT improved refined analysis
  57. GRB 051105: Swift-BAT refined analysis
  58. GRB 051105: Optical limit
  59. GRB 051016B host spectroscopy and redshift
  60. GRB051016B: optical observation
  61. Konus-Wind observation of GRB 051028
  62. GRB051028:MASTER correction and final results
  63. GRB 051022: RTT150 optical observations
  64. GRB 051021A: RTT150 optical observations
  65. GRB051028 SARA Observation
  66. GRB051028: optical observations
  67. GRB051028: Swift/UVOT upper limits
  68. GRB051028: WHT optical candidate
  69. GRB051028: Swift XRT Position
  70. GRB051028:MASTER observations
  71. GRB 051022: XRT Refined Spectral and Temporal Analysis--Correction
  72. GRB051022: Swift XRT measurement of jet break
  73. GRB051021B: Swift/UVOT Upper limits
  74. GRB 051022: XRT Refined Spectral and Temporal Analysis
  75. GRB 051022, refined optical astrometry
  76. Chandra Observations of GRB 051022
  77. GRB051012: Swift-XRT analysis
  78. GRB051021B: Swift XRT refined analysis
  79. GRB051021a: optical observations
  80. GRB 051022: WSRT Radio Detection
  81. GRB 051022, mm counterpart
  82. GRB051022: host galaxy redshift
  83. GRB 051022: Swift/UVOT Upper Limits
  84. GRB051022: Radio Counterpart
  85. GRB051022: IR observations
  86. GRB 051022: SOAR JKs Observations
  87. GRB051021A: Swift XRT refined analysis
  88. Konus-Wind observation of GRB 051022
  89. GRB051022: Optical Observations
  90. GRB 051022: Magellan NIR imaging
  91. GRB 051021: PROMPT RcIc Observations
  92. GRB051021b: Magellan IR Imaging
  93. GRB 051021: Correction
  94. GRB 051022, J & K-band observation
  95. GRB 051021, SMARTS optical/IR observations
  96. GRB051022: Swift XRT Position
  97. GRB 051021: P200 Ks Observations
  98. IPN triangulation of GRB051022 (=H3950)
  99. GRB 051021: MDM Upper Limit
  100. GRB 051022 (=H3950): SXC Flight Localization is Valid

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