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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"

36077 results found.

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

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