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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"

32719 results found.

  1. GRB 051111a: IR photometry
  2. GRB 051111A: KAIT optical observations
  3. GRB 051111a: Afterglow fading in Ic
  4. GRB051111: Super-LOTIS Early Detection
  5. GRB 051111: ROTSE-III Analysis of Prompt Counterpart
  6. GRB 051103 Milagro GeV/TeV Observations
  7. GRB 051111A: ROTSE-III Detection of Possible Counterpart
  8. GRB 051008 Tautenburg Supernova Search
  9. GRB 051109B. Radio Observations
  10. GRB 051109A
  11. GRB051109A - radio observations
  12. GRB 051105a: GETS optical limit
  13. GRB 051109b: GETS observation
  14. GRB 051109A: KAIT optical observations
  15. Early RAPTOR measurements of GRB 051109a - the movie.
  16. Konus-Wind observation of GRB 051109A
  17. GRB 051109B: Swift-BAT refined analysis
  18. GRB 051109B: ROTSE-III Optical Limits
  19. GRB 051109A: Swift-UVOT Observations
  20. GRB051109B: no UVOT source detected
  21. GRB051109B: XRT refined analysis
  22. GRB 051109B : Lulin Optical Observations
  23. GRB051109A: further steepening in the X-ray light curve
  24. GRB051109A: XRT refined analysis
  25. GRB 051109a: BOOTES R & I-band detection of the early afterglow
  26. GRB051109B: XRT position
  27. GRB 051109B Kiso optical follow-up observation
  28. GRB 051109: HET Optical Spectrum and Absorption Redshift
  29. GRB 051109: PROMPT Detections
  30. GRB 051109: Rc and Ic observations
  31. GRB051109: Early Super-LOTIS Detection
  32. GRB 051109: Swift-BAT refined analysis
  33. GRB 051109a: MDM Observations
  34. GRB 051109A: ROTSE-III Decline rate for Optical Counterpart
  35. GRB051109: Swift detection of a burst
  36. GRB 051109a: IR Detections
  37. GRB 051109: ROTSE-III Detection of Possible Counterpart
  38. GRB051105B: Swift/XRT upper limit
  39. GRB051105B: Swift/UVOT upper limit
  40. GRB051103: optical observations
  41. GRB 051103, optical observations
  42. GRB051103: MASTER: OT limit and host galaxy candidates
  43. GRB051028: Swift-XRT refined analysis
  44. GRB 051105a, observation from Naini Tal and OSN
  45. GRB 051105A, 2nd epoch optical observations
  46. GRB 051105a: MDM Observations
  47. GRB 051105A: TNG optical observations
  48. GRB051105A: Swift/UVOT Observations
  49. GRB 051105A, radio observations
  50. GRB051103:_MASTER_optical_observations
  51. GRB 051105A, optical observations
  52. XRT observations of GRB 051105A
  53. GRB 051105: Swift-BAT improved refined analysis
  54. GRB 051105: Swift-BAT refined analysis
  55. GRB 051105: Optical limit
  56. GRB 051016B host spectroscopy and redshift
  57. GRB051016B: optical observation
  58. Konus-Wind observation of GRB 051028
  59. GRB051028:MASTER correction and final results
  60. GRB 051022: RTT150 optical observations
  61. GRB 051021A: RTT150 optical observations
  62. GRB051028 SARA Observation
  63. GRB051028: optical observations
  64. GRB051028: Swift/UVOT upper limits
  65. GRB051028: WHT optical candidate
  66. GRB051028: Swift XRT Position
  67. GRB051028:MASTER observations
  68. GRB 051022: XRT Refined Spectral and Temporal Analysis--Correction
  69. GRB051022: Swift XRT measurement of jet break
  70. GRB051021B: Swift/UVOT Upper limits
  71. GRB 051022: XRT Refined Spectral and Temporal Analysis
  72. GRB 051022, refined optical astrometry
  73. Chandra Observations of GRB 051022
  74. GRB051012: Swift-XRT analysis
  75. GRB051021B: Swift XRT refined analysis
  76. GRB051021a: optical observations
  77. GRB 051022: WSRT Radio Detection
  78. GRB 051022, mm counterpart
  79. GRB051022: host galaxy redshift
  80. GRB 051022: Swift/UVOT Upper Limits
  81. GRB051022: Radio Counterpart
  82. GRB051022: IR observations
  83. GRB 051022: SOAR JKs Observations
  84. GRB051021A: Swift XRT refined analysis
  85. Konus-Wind observation of GRB 051022
  86. GRB051022: Optical Observations
  87. GRB 051022: Magellan NIR imaging
  88. GRB 051021: PROMPT RcIc Observations
  89. GRB051021b: Magellan IR Imaging
  90. GRB 051021: Correction
  91. GRB 051022, J & K-band observation
  92. GRB 051021, SMARTS optical/IR observations
  93. GRB051022: Swift XRT Position
  94. GRB 051021: P200 Ks Observations
  95. IPN triangulation of GRB051022 (=H3950)
  96. GRB 051021: MDM Upper Limit
  97. GRB 051022 (=H3950): SXC Flight Localization is Valid
  98. GRB051021: Swift/UVOT Upper Limits
  99. GRB 051021B: Refined analysis of the Swift-BAT burst
  100. GRB 051022: SSO40 Optical Observations

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