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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"

26666 results found.

  1. GRB 051210: Swift/UVOT upper limits
  2. GRB 051210: Magellan Imaging
  3. GRB 051211: TAROT optical limits
  4. GRB 051211B: a possible optical detection by TAROT
  5. GRB 051211:IAC80 optical observations
  6. GRB 051210: SALT detection limit
  7. GRB 051210: Swift XRT refined analysis
  8. GRB 051210: FRAM early limit
  9. GRB051210: Swift UVOT Observation
  10. GRB 051210: Swift detection of a burst
  11. Swift XRT positions
  12. An extraordinary long burst on December 3 from SGR1806-20
  13. GRB 051127: Swift-BAT detection of a possible burst
  14. GRB051117B: Swift XRT refined analysis
  15. GRB051117b: No Swift/UVOT Detection
  16. GRB 051117A: Swift/UVOT Detection of an Afterglow
  17. GRB051008: Suzaku WAM observation of the prompt emission
  18. GRB 051021 Optical Observations
  19. GRB 051117B: R and I observations of possible host galaxy
  20. GRB 051117A: Refined analysis of the Swift-BAT burst
  21. GRB 051117B: Refined analysis of the Swift-BAT burst
  22. GRB051117A : XRT refined analysis
  23. GRB 051117B,optical observation
  24. GRB 051117B: Swift detection of a burst
  25. GRB 051117: Swift detection of a bright burst
  26. GRB051114: results of the Swift-XRT observation
  27. GRB 051028 Optical Observations
  28. GRB 051109B : Nainital upper limits
  29. GRB 051114: Radio Observations
  30. GRB 051114: Swift-BAT refined analysis
  31. GRB050925: analysis of the XMM-Newton observation
  32. GRB 051114: Swift-BAT detection of a short burst
  33. GRB 051111: Further spectroscopic analysis
  34. GRB 051111: Radio afterglow
  35. GRB 051113: Swift-BAT refined analysis
  36. GRB 051113: Swift-BAT detection of a burst
  37. GRB051103: Radio Observations
  38. GRB 051109A Milagro GeV/TeV Observations
  39. GRB/SGR 050925: XMM-Newton ToO observation
  40. GRB051111: Swift/UVOT Observations
  41. GRB051111: XRT preliminary analysis
  42. GRB 051109A Optical Observations
  43. GRB 051111a: IR photometry
  44. Faulkes Telescope R-band detection of GRB051111
  45. GRB 051103 Milagro GeV/TeV Observations
  46. GRB 051109B. Radio Observations
  47. GRB 051109A
  48. GRB051109A - radio observations
  49. Konus-Wind observation of GRB 051109A
  50. GRB 051109A: Swift-UVOT Observations
  51. IPN triangulation and Konus spectrum of the short/soft GRB051107 (large
  52. GRB051109B: no UVOT source detected
  53. GRB051109B: XRT refined analysis
  54. GRB051109A: further steepening in the X-ray light curve
  55. GRB051109A: XRT refined analysis
  56. GRB 051109B: Super-LOTIS Observations
  57. GRB051105B: REM Optical observation
  58. GRB 051109: Rc and Ic observations
  59. GRB 051109: Swift-BAT refined analysis
  60. GRB 051109a: IR Photometry and Astrometry
  61. GRB051109: Swift detection of a burst
  62. GRB 051109a: IR Detections
  63. GRB051105B: Swift/XRT upper limit
  64. GRB051105B: Swift/UVOT upper limit
  65. GRB051103: MASTER: OT limit and host galaxy candidates
  66. GRB051028: Swift-XRT refined analysis
  67. GRB 051105a, observation from Naini Tal and OSN
  68. GRB 051105a: MDM Observations
  69. GRB 051105A: TNG optical observations
  70. GRB051105A: Swift/UVOT Observations
  71. GRB 051105A, radio observations
  72. GRB051103:_MASTER_optical_observations
  73. IPN triangulation and Konus spectrum of the bright short/hard GRB051103
  74. XRT observations of GRB 051105A
  75. GRB 051105b: ART optical limits
  76. GRB051105B - A long GRB detected by INTEGRAL
  77. GRB 051105B (INTEGRAL 2701): Optical observation
  78. GRB 051105: Swift detection of a short burst
  79. Recent GRB UBVRcIc field photometry
  80. Konus-Wind observation of GRB 051028
  81. GRB051028 SARA Observation
  82. GRB051028: Swift/UVOT upper limits
  83. GRB051028: Swift XRT Position
  84. GRB 051028 (=H3951): A GRB localized by HETE
  85. GRB051022: Swift XRT measurement of jet break
  86. SGR 1806-20: continued moderate activity seen with INTEGRAL
  87. GRB051021B: Swift/UVOT Upper limits
  88. GRB 051021, Optical Observations
  89. GRB 051022: XRT Refined Spectral and Temporal Analysis
  90. GRB051012: Swift-XRT analysis
  91. GRB 051022 Chandra Observations scheduled
  92. GRB051021B: Swift XRT refined analysis
  93. GRB051021a: optical observations
  94. GRB 051022, mm counterpart
  95. GRB 051022: Swift/UVOT Upper Limits
  96. GRB051022: Radio Counterpart
  97. GRB051022: IR observations
  98. GRB051021A: Swift XRT refined analysis
  99. Konus-Wind observation of GRB 051022
  100. GRB051022: Optical Observations

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