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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"

36366 results found.

  1. GRB 051114: Swift-BAT detection of a short burst
  2. GRB 051111: Further spectroscopic analysis
  3. GRB 051111: Radio afterglow
  4. GRB 051113: Swift-BAT refined analysis
  5. GRB 051113: Swift-BAT detection of a burst
  6. GRB 051111: AEOS optical observations
  7. GRB051103: Radio Observations
  8. GRB 051109A Milagro GeV/TeV Observations
  9. GRB/SGR 050925: XMM-Newton ToO observation
  10. GRB051111: Swift/UVOT Observations
  11. GRB 051111A : R-band temporal decay index based on Lulin
  12. GRB 051111: Swift-BAT refined analysis
  13. GRB 051109A Optical Observations
  14. GRB 051111A : Lulin BVRI multi band afterglow observation
  15. GRB051111a: SARA Observations
  16. GRB 051111a: IR photometry
  17. GRB 051111: Keck HIRES redshift
  18. GRB 051111A: KAIT optical observations
  19. GRB 051111a: Afterglow fading in Ic
  20. GRB 051111: ROTSE-III Analysis of Prompt Counterpart
  21. GRB 051103 Milagro GeV/TeV Observations
  22. GRB 051111A: ROTSE-III Detection of Possible Counterpart
  23. GRB 051008 Tautenburg Supernova Search
  24. GRB 051109B. Radio Observations
  25. GRB 051109A
  26. GRB051109A - radio observations
  27. GRB 051105a: GETS optical limit
  28. GRB 051109b: GETS observation
  29. GRB 051109A: KAIT optical observations
  30. Early RAPTOR measurements of GRB 051109a - the movie.
  31. Konus-Wind observation of GRB 051109A
  32. GRB 051109B: Swift-BAT refined analysis
  33. GRB 051109B: ROTSE-III Optical Limits
  34. GRB 051109A: Swift-UVOT Observations
  35. IPN triangulation and Konus spectrum of the short/soft GRB051107 (large
  36. GRB 051109B : Lulin Optical Observations
  37. GRB 051109A : Lulin BVRI Optical afterglow observation
  38. GRB 051109a: BOOTES R & I-band detection of the early afterglow
  39. GRB051109B: XRT position
  40. GRB 051109B: Super-LOTIS Observations
  41. GRB 051109B Kiso optical follow-up observation
  42. GRB 051109B: Swift detection of a burst
  43. GRB 051109: HET Optical Spectrum and Absorption Redshift
  44. GRB 051109: PROMPT Detections
  45. GRB 051109: Rc and Ic observations
  46. GRB 051109: Swift-BAT refined analysis
  47. GRB 051109a: IR Photometry and Astrometry
  48. GRB 051109a: MDM Observations
  49. GRB 051109A: ROTSE-III Decline rate for Optical Counterpart
  50. GRB 051109a: IR Detections
  51. GRB 051109: ROTSE-III Detection of Possible Counterpart
  52. GRB051105B: Swift/XRT upper limit
  53. GRB051105B: Swift/UVOT upper limit
  54. GRB051103: optical observations
  55. GRB 051103, optical observations
  56. GRB051103: MASTER: OT limit and host galaxy candidates
  57. GRB 051105a, observation from Naini Tal and OSN
  58. GRB 051105A, 2nd epoch optical observations
  59. GRB 051105a: MDM Observations
  60. GRB 051105A: TNG optical observations
  61. GRB051105A: Swift/UVOT Observations
  62. GRB 051105A, radio observations
  63. GRB051103:_MASTER_optical_observations
  64. IPN triangulation and Konus spectrum of the bright short/hard GRB051103
  65. GRB 051105A, optical observations
  66. XRT observations of GRB 051105A
  67. GRB 051105: Swift-BAT improved refined analysis
  68. GRB 051105b: ART optical limits
  69. GRB051105B - A long GRB detected by INTEGRAL
  70. GRB 051105B (INTEGRAL 2701): Optical observation
  71. GRB 051105: Swift-BAT refined analysis
  72. GRB 051105: Optical limit
  73. GRB 051105: Swift detection of a short burst
  74. IBAS Alert 2700: Not a GRB
  75. GRB 051016B host spectroscopy and redshift
  76. GRB051016B: optical observation
  77. Recent GRB UBVRcIc field photometry
  78. Konus-Wind observation of GRB 051028
  79. GRB051028:MASTER correction and final results
  80. GRB 051022: RTT150 optical observations
  81. GRB 051021A: RTT150 optical observations
  82. GRB051028 SARA Observation
  83. GRB051028: optical observations
  84. GRB051028: Swift/UVOT upper limits
  85. GRB051028: confirmation of the afterglow
  86. GRB051028: WHT optical candidate
  87. GRB051028: Swift XRT Position
  88. GRB051028:MASTER observations
  89. GRB 051028 (=H3951): A GRB localized by HETE
  90. GRB051028:MASTER optical observations
  91. GRB 051022: XRT Refined Spectral and Temporal Analysis--Correction
  92. GRB051022: Swift XRT measurement of jet break
  93. GRB051021B: Swift/UVOT Upper limits
  94. GRB 051021, Optical Observations
  95. GRB 051022: XRT Refined Spectral and Temporal Analysis
  96. GRB 051022, refined optical astrometry
  97. Chandra Observations of GRB 051022
  98. GRB 051022 Chandra Observations scheduled
  99. GRB051021a: optical observations
  100. GRB 051022: WSRT Radio Detection

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