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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"

23716 results found.

  1. GRB051211b: P60 Observations
  2. GRB 051211A and GRB051211B: BOOTES simultaneous observations
  3. GRB 051210: Magellan Imaging
  4. GRB 051211: TAROT optical limits
  5. GRB 051211B: a possible optical detection by TAROT
  6. GRB 051211B: a long GRB detected by INTEGRAL
  7. GRB 051211:IAC80 optical observations
  8. HETE SXC localization of GRB 051211 (=H3979)
  9. GRB 051210: SALT detection limit
  10. GRB 051210: BAT further refined analysis of the short burst
  11. GRB 051210: Swift-BAT refined analysis of a short burst
  12. GRB 051210: A short GRB in a cluster?
  13. GRB 051210: Swift detection of a burst
  14. IPN observations of SGR1806-20
  15. GRB051117B: optical observation
  16. GRB051111: optical observaion
  17. GRB 051127: Swift-BAT detection of a possible burst
  18. GRB051117B: Swift XRT refined analysis
  19. GRB051117b: No Swift/UVOT Detection
  20. GRB051111: Suzaku WAM observation of the prompt emission
  21. GRB 051021 Optical Observations
  22. GRB 051117A: Refined analysis of the Swift-BAT burst
  23. GRB051117A : XRT refined analysis
  24. GRB 051117B: Lulin R and I band observation
  25. GRB051117B: Swift XRT position
  26. GRB 051117B: Swift detection of a burst
  27. GRB 051117: Swift detection of a bright burst
  28. GRB 051028 Optical Observations
  29. GRB050925: analysis of the XMM-Newton observation
  30. GRB051109A optical observations
  31. GRB 051113: Swift-BAT refined analysis
  32. GRB051111: Swift/UVOT Observations
  33. GRB 051111: Swift-BAT refined analysis
  34. GRB 051109A Optical Observations
  35. GRB 051111A : Lulin BVRI multi band afterglow observation
  36. GRB 051111: Keck HIRES redshift
  37. GRB 051111A: KAIT optical observations
  38. GRB 051111a: Afterglow fading in Ic
  39. Faulkes Telescope R-band detection of GRB051111
  40. GRB 051103 Milagro GeV/TeV Observations
  41. GRB 051109B. Radio Observations
  42. GRB 051109A
  43. GRB 051109A: KAIT optical observations
  44. Konus-Wind observation of GRB 051109A
  45. IPN triangulation and Konus spectrum of the short/soft GRB051107 (large
  46. GRB051109B: no UVOT source detected
  47. GRB 051109B : Lulin Optical Observations
  48. GRB 051109A : Lulin BVRI Optical afterglow observation
  49. GRB 051109a: BOOTES R & I-band detection of the early afterglow
  50. GRB 051109B: Super-LOTIS Observations
  51. GRB051105B: REM Optical observation
  52. GRB 051109B: Swift detection of a burst
  53. GRB 051109: PROMPT Detections
  54. GRB 051109: Rc and Ic observations
  55. GRB051109: Early Super-LOTIS Detection
  56. GRB 051109: Swift-BAT refined analysis
  57. GRB051109: Swift detection of a burst
  58. GRB051103: optical observations
  59. GRB 051103, optical observations
  60. GRB051103: MASTER: OT limit and host galaxy candidates
  61. GRB051028: Swift-XRT refined analysis
  62. GRB 051105A, 2nd epoch optical observations
  63. GRB 051105a: MDM Observations
  64. GRB 051105A: TNG optical observations
  65. GRB051105A: Swift/UVOT Observations
  66. GRB051103:_MASTER_optical_observations
  67. IPN triangulation and Konus spectrum of the bright short/hard GRB051103
  68. GRB 051105: Swift-BAT improved refined analysis
  69. GRB051105B - A long GRB detected by INTEGRAL
  70. GRB 051105: Swift-BAT refined analysis
  71. GRB 051105: Swift detection of a short burst
  72. GRB 051016B host spectroscopy and redshift
  73. GRB051016B: optical observation
  74. Recent GRB UBVRcIc field photometry
  75. Konus-Wind observation of GRB 051028
  76. GRB051028:MASTER correction and final results
  77. GRB 051022: RTT150 optical observations
  78. GRB 051021A: RTT150 optical observations
  79. GRB051028 SARA Observation
  80. GRB051028: optical observations
  81. GRB051028: Swift/UVOT upper limits
  82. GRB051028: confirmation of the afterglow
  83. GRB051028: WHT optical candidate
  84. GRB051028: Swift XRT Position
  85. GRB051028:MASTER observations
  86. GRB 051028 (=H3951): A GRB localized by HETE
  87. GRB051028:MASTER optical observations
  88. SGR 1806-20: continued moderate activity seen with INTEGRAL
  89. GRB051021B: Swift/UVOT Upper limits
  90. GRB 051022, refined optical astrometry
  91. GRB051012: Swift-XRT analysis
  92. GRB051021a: optical observations
  93. GRB 051022, mm counterpart
  94. GRB051022: host galaxy redshift
  95. GRB 051022: SOAR JKs Observations
  96. GRB 051021: PROMPT RcIc Observations
  97. GRB 051022: Spectral Analysis Indicates That The Spectrum Is Absorbed
  98. GRB 051022, J & K-band observation
  99. IPN triangulation of GRB051022 (=H3950)
  100. GRB 051022 (=H3950): SXC Flight Localization is Valid

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