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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"

32724 results found.

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

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