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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"

28098 results found.

  1. GRB 051211A: Swift/UVOT upper limits
  2. GRB 051211B: Swift/UVOT upper limits
  3. GRB 051211A,optical observation
  4. GRB051211B: Liverpool Telescope observation
  5. GRB051211b: P60 Observations
  6. GRB 051211A and GRB051211B: BOOTES simultaneous observations
  7. GRB 051210: Swift/UVOT upper limits
  8. GRB 051210: Magellan Imaging
  9. GRB 051211: TAROT optical limits
  10. GRB 051211B: a possible optical detection by TAROT
  11. GRB 051211:IAC80 optical observations
  12. GRB 051210: SALT detection limit
  13. GRB 051210: Swift XRT refined analysis
  14. GRB 051210: FRAM early limit
  15. GRB 051210: Swift-BAT refined analysis of a short burst
  16. GRB051210: Swift UVOT Observation
  17. GRB 051210: Swift detection of a burst
  18. An extraordinary long burst on December 3 from SGR1806-20
  19. Possible resuming of the SGR 1806-20 activity
  20. GRB051117B: Swift XRT refined analysis
  21. GRB051117b: No Swift/UVOT Detection
  22. GRB 051117A: Swift/UVOT Detection of an Afterglow: Correction
  23. GRB 051117A: Swift/UVOT Detection of an Afterglow
  24. GRB051111: Suzaku WAM observation of the prompt emission
  25. GRB051008: Suzaku WAM observation of the prompt emission
  26. GRB 051117B: R and I observations of possible host galaxy
  27. GRB 051117A: Refined analysis of the Swift-BAT burst
  28. GRB 051117B: Refined analysis of the Swift-BAT burst
  29. GRB 051117B,optical observation
  30. GRB 051117B: Lulin R and I band observation
  31. GRB051114: results of the Swift-XRT observation
  32. GRB 051109B : Nainital upper limits
  33. GRB 051114: Radio Observations
  34. GRB 051114: Swift-BAT refined analysis
  35. GRB050925: analysis of the XMM-Newton observation
  36. GRB 051114: Swift-BAT detection of a short burst
  37. GRB 051111: Further spectroscopic analysis
  38. GRB 051111: Radio afterglow
  39. GRB 051113: Swift-BAT refined analysis
  40. GRB051103: Radio Observations
  41. GRB/SGR 050925: XMM-Newton ToO observation
  42. GRB051111: Swift/UVOT Observations
  43. GRB051111: XRT preliminary analysis
  44. GRB 051111: Swift-BAT refined analysis
  45. GRB 051109A Optical Observations
  46. GRB 051111A : Lulin BVRI multi band afterglow observation
  47. GRB051111a: SARA Observations
  48. GRB 051111a: IR photometry
  49. GRB 051109B. Radio Observations
  50. GRB 051109A
  51. GRB051109A - radio observations
  52. GRB 051109B: Swift-BAT refined analysis
  53. GRB 051109A: Swift-UVOT Observations
  54. IPN triangulation and Konus spectrum of the short/soft GRB051107 (large
  55. GRB051109B: no UVOT source detected
  56. GRB051109B: XRT refined analysis
  57. GRB 051109B : Lulin Optical Observations
  58. GRB 051109A : Lulin BVRI Optical afterglow observation
  59. GRB051109A: further steepening in the X-ray light curve
  60. GRB051109A: XRT refined analysis
  61. GRB 051109B: Super-LOTIS Observations
  62. GRB051105B: REM Optical observation
  63. GRB 051109B: Swift detection of a burst
  64. GRB 051109: Rc and Ic observations
  65. GRB 051109: Swift-BAT refined analysis
  66. GRB 051109a: IR Photometry and Astrometry
  67. GRB051109: Swift detection of a burst
  68. GRB 051109a: IR Detections
  69. GRB051105B: Swift/XRT upper limit
  70. GRB051105B: Swift/UVOT upper limit
  71. GRB051103: MASTER: OT limit and host galaxy candidates
  72. GRB051028: Swift-XRT refined analysis
  73. GRB 051105a, observation from Naini Tal and OSN
  74. GRB 051105a: MDM Observations
  75. GRB 051105A: TNG optical observations
  76. GRB051105A: Swift/UVOT Observations
  77. GRB 051105A, radio observations
  78. GRB051103:_MASTER_optical_observations
  79. IPN triangulation and Konus spectrum of the bright short/hard GRB051103
  80. GRB 051105A, optical observations
  81. XRT observations of GRB 051105A
  82. GRB 051105b: ART optical limits
  83. GRB 051105B (INTEGRAL 2701): Optical observation
  84. GRB 051105: Swift detection of a short burst
  85. Recent GRB UBVRcIc field photometry
  86. GRB051028 SARA Observation
  87. GRB051028: optical observations
  88. GRB051028: Swift/UVOT upper limits
  89. GRB051028: Swift XRT Position
  90. GRB051028:MASTER observations
  91. GRB051021B: Swift/UVOT Upper limits
  92. GRB 051021, Optical Observations
  93. GRB 051022: XRT Refined Spectral and Temporal Analysis
  94. GRB051012: Swift-XRT analysis
  95. GRB051021B: Swift XRT refined analysis
  96. GRB 051022, mm counterpart
  97. GRB 051022: Swift/UVOT Upper Limits
  98. GRB051022: Radio Counterpart
  99. GRB051022: IR observations
  100. GRB051021A: Swift XRT refined analysis

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