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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"

32723 results found.

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

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