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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"

36385 results found.

  1. GRB 051109A : GAO 150cm telescope Rc-band detection
  2. GRB 051021 Optical Observations
  3. GRB 051117B: MARGE Optical Limits
  4. GRB 051117A and B: Radio Observations
  5. GRB 051117B: R and I observations of possible host galaxy
  6. GRB 051117b: NIR observations
  7. GRB 051117A: Refined analysis of the Swift-BAT burst
  8. GRB 051117B: Refined analysis of the Swift-BAT burst
  9. GRB 051117B,optical observation
  10. GRB 051117B: Lulin R and I band observation
  11. GRB 051117B: Optical observations
  12. GRB 051117B: ROTSE-III Optical Limits
  13. GRB 051117B: Swift detection of a burst
  14. GRB 051117: Swift detection of a bright burst
  15. GRB 051028 Optical Observations
  16. GRB 051109B : Nainital upper limits
  17. GRB 051114: Radio Observations
  18. GRB 051114: Swift-BAT refined analysis
  19. GRB051109A optical observations
  20. GRB 051114: Swift-BAT detection of a short burst
  21. GRB 051111: Further spectroscopic analysis
  22. GRB 051111: Radio afterglow
  23. GRB 051113: Swift-BAT refined analysis
  24. GRB 051113: Swift-BAT detection of a burst
  25. GRB 051111: AEOS optical observations
  26. GRB051103: Radio Observations
  27. GRB 051109A Milagro GeV/TeV Observations
  28. GRB/SGR 050925: XMM-Newton ToO observation
  29. GRB051111: Swift/UVOT Observations
  30. GRB 051111A : R-band temporal decay index based on Lulin
  31. GRB 051111: Swift-BAT refined analysis
  32. GRB 051109A Optical Observations
  33. GRB 051111A : Lulin BVRI multi band afterglow observation
  34. GRB051111a: SARA Observations
  35. GRB 051111a: IR photometry
  36. GRB 051111: Keck HIRES redshift
  37. GRB 051111A: KAIT optical observations
  38. GRB 051111a: Afterglow fading in Ic
  39. GRB 051111: ROTSE-III Analysis of Prompt Counterpart
  40. GRB 051103 Milagro GeV/TeV Observations
  41. GRB 051111A: ROTSE-III Detection of Possible Counterpart
  42. GRB 051008 Tautenburg Supernova Search
  43. GRB 051109B. Radio Observations
  44. GRB 051109A
  45. GRB051109A - radio observations
  46. GRB 051105a: GETS optical limit
  47. GRB 051109b: GETS observation
  48. GRB 051109A: KAIT optical observations
  49. Early RAPTOR measurements of GRB 051109a - the movie.
  50. Konus-Wind observation of GRB 051109A
  51. GRB 051109B: Swift-BAT refined analysis
  52. GRB 051109B: ROTSE-III Optical Limits
  53. GRB 051109A: Swift-UVOT Observations
  54. IPN triangulation and Konus spectrum of the short/soft GRB051107 (large
  55. GRB 051109B : Lulin Optical Observations
  56. GRB 051109A : Lulin BVRI Optical afterglow observation
  57. GRB 051109a: BOOTES R & I-band detection of the early afterglow
  58. GRB051109B: XRT position
  59. GRB 051109B: Super-LOTIS Observations
  60. GRB 051109B Kiso optical follow-up observation
  61. GRB 051109B: Swift detection of a burst
  62. GRB 051109: HET Optical Spectrum and Absorption Redshift
  63. GRB 051109: PROMPT Detections
  64. GRB 051109: Rc and Ic observations
  65. GRB 051109: Swift-BAT refined analysis
  66. GRB 051109a: IR Photometry and Astrometry
  67. GRB 051109a: MDM Observations
  68. GRB 051109A: ROTSE-III Decline rate for Optical Counterpart
  69. GRB 051109a: IR Detections
  70. GRB 051109: ROTSE-III Detection of Possible Counterpart
  71. GRB051105B: Swift/XRT upper limit
  72. GRB051105B: Swift/UVOT upper limit
  73. GRB051103: optical observations
  74. GRB 051103, optical observations
  75. GRB051103: MASTER: OT limit and host galaxy candidates
  76. GRB 051105a, observation from Naini Tal and OSN
  77. GRB 051105A, 2nd epoch optical observations
  78. GRB 051105a: MDM Observations
  79. GRB 051105A: TNG optical observations
  80. GRB051105A: Swift/UVOT Observations
  81. GRB 051105A, radio observations
  82. GRB051103:_MASTER_optical_observations
  83. IPN triangulation and Konus spectrum of the bright short/hard GRB051103
  84. GRB 051105A, optical observations
  85. XRT observations of GRB 051105A
  86. GRB 051105: Swift-BAT improved refined analysis
  87. GRB 051105b: ART optical limits
  88. GRB051105B - A long GRB detected by INTEGRAL
  89. GRB 051105B (INTEGRAL 2701): Optical observation
  90. GRB 051105: Swift-BAT refined analysis
  91. GRB 051105: Optical limit
  92. GRB 051105: Swift detection of a short burst
  93. IBAS Alert 2700: Not a GRB
  94. GRB 051016B host spectroscopy and redshift
  95. GRB051016B: optical observation
  96. Recent GRB UBVRcIc field photometry
  97. Konus-Wind observation of GRB 051028
  98. GRB051028:MASTER correction and final results
  99. GRB 051022: RTT150 optical observations
  100. GRB 051021A: RTT150 optical observations

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