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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"

32714 results found.

  1. GRB 051103 Milagro GeV/TeV Observations
  2. GRB 051111A: ROTSE-III Detection of Possible Counterpart
  3. GRB 051008 Tautenburg Supernova Search
  4. GRB 051109B. Radio Observations
  5. GRB 051109A
  6. GRB051109A - radio observations
  7. GRB 051105a: GETS optical limit
  8. GRB 051109b: GETS observation
  9. GRB 051109A: KAIT optical observations
  10. Early RAPTOR measurements of GRB 051109a - the movie.
  11. Konus-Wind observation of GRB 051109A
  12. GRB 051109B: Swift-BAT refined analysis
  13. GRB 051109B: ROTSE-III Optical Limits
  14. GRB 051109A: Swift-UVOT Observations
  15. GRB051109B: no UVOT source detected
  16. GRB051109B: XRT refined analysis
  17. GRB 051109B : Lulin Optical Observations
  18. GRB051109A: further steepening in the X-ray light curve
  19. GRB051109A: XRT refined analysis
  20. GRB 051109a: BOOTES R & I-band detection of the early afterglow
  21. GRB051109B: XRT position
  22. GRB 051109B Kiso optical follow-up observation
  23. GRB 051109: HET Optical Spectrum and Absorption Redshift
  24. GRB 051109: PROMPT Detections
  25. GRB 051109: Rc and Ic observations
  26. GRB051109: Early Super-LOTIS Detection
  27. GRB 051109: Swift-BAT refined analysis
  28. GRB 051109a: MDM Observations
  29. GRB 051109A: ROTSE-III Decline rate for Optical Counterpart
  30. GRB051109: Swift detection of a burst
  31. GRB 051109a: IR Detections
  32. GRB 051109: ROTSE-III Detection of Possible Counterpart
  33. GRB051105B: Swift/XRT upper limit
  34. GRB051105B: Swift/UVOT upper limit
  35. GRB051103: optical observations
  36. GRB 051103, optical observations
  37. GRB051103: MASTER: OT limit and host galaxy candidates
  38. GRB051028: Swift-XRT refined analysis
  39. GRB 051105a, observation from Naini Tal and OSN
  40. GRB 051105A, 2nd epoch optical observations
  41. GRB 051105a: MDM Observations
  42. GRB 051105A: TNG optical observations
  43. GRB051105A: Swift/UVOT Observations
  44. GRB 051105A, radio observations
  45. GRB051103:_MASTER_optical_observations
  46. GRB 051105A, optical observations
  47. XRT observations of GRB 051105A
  48. GRB 051105: Swift-BAT improved refined analysis
  49. GRB 051105: Swift-BAT refined analysis
  50. GRB 051105: Optical limit
  51. GRB 051016B host spectroscopy and redshift
  52. GRB051016B: optical observation
  53. Konus-Wind observation of GRB 051028
  54. GRB051028:MASTER correction and final results
  55. GRB 051022: RTT150 optical observations
  56. GRB 051021A: RTT150 optical observations
  57. GRB051028 SARA Observation
  58. GRB051028: optical observations
  59. GRB051028: Swift/UVOT upper limits
  60. GRB051028: WHT optical candidate
  61. GRB051028: Swift XRT Position
  62. GRB051028:MASTER observations
  63. GRB 051022: XRT Refined Spectral and Temporal Analysis--Correction
  64. GRB051022: Swift XRT measurement of jet break
  65. GRB051021B: Swift/UVOT Upper limits
  66. GRB 051022: XRT Refined Spectral and Temporal Analysis
  67. GRB 051022, refined optical astrometry
  68. Chandra Observations of GRB 051022
  69. GRB051012: Swift-XRT analysis
  70. GRB051021B: Swift XRT refined analysis
  71. GRB051021a: optical observations
  72. GRB 051022: WSRT Radio Detection
  73. GRB 051022, mm counterpart
  74. GRB051022: host galaxy redshift
  75. GRB 051022: Swift/UVOT Upper Limits
  76. GRB051022: Radio Counterpart
  77. GRB051022: IR observations
  78. GRB 051022: SOAR JKs Observations
  79. GRB051021A: Swift XRT refined analysis
  80. Konus-Wind observation of GRB 051022
  81. GRB051022: Optical Observations
  82. GRB 051022: Magellan NIR imaging
  83. GRB 051021: PROMPT RcIc Observations
  84. GRB051021b: Magellan IR Imaging
  85. GRB 051021: Correction
  86. GRB 051022, J & K-band observation
  87. GRB 051021, SMARTS optical/IR observations
  88. GRB051022: Swift XRT Position
  89. GRB 051021: P200 Ks Observations
  90. IPN triangulation of GRB051022 (=H3950)
  91. GRB 051021: MDM Upper Limit
  92. GRB 051022 (=H3950): SXC Flight Localization is Valid
  93. GRB051021: Swift/UVOT Upper Limits
  94. GRB 051021B: Refined analysis of the Swift-BAT burst
  95. GRB 051022: SSO40 Optical Observations
  96. GRB 051022A: ROTSE-III Optical Limits
  97. GRB051022 (=H3590), A GRB Detected By HETE
  98. GRB 051022: Optical observations
  99. GRB051021B: Swift XRT Position
  100. GRB 051021: SOAR NIR Observations

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