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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"

32692 results found.

  1. GRB 051215: near-infrared observations
  2. GRB051215 - SDSS pre-burst observations
  3. GRB 051215: A short GRB in a cluster?
  4. GRB051211B: Probable radio afterglow
  5. GRB051105: optical observations
  6. GRB 051213: Swift-BAT refined analysis
  7. GRB051211B: XRT refined analysis
  8. GRB051211B, RBO optical observations
  9. GRB 051211A: Swift/UVOT upper limits
  10. GRB 051211B: Swift/UVOT upper limits - correction
  11. GRB 051211B: Swift/UVOT upper limits
  12. GRB 051211A,optical observation
  13. GRB 051211B: Swift XRT confirmation of the afterglow
  14. GRB051211B: Liverpool Telescope observation
  15. GRB 051211b: RTT150 optical observations
  16. GRB051211b: P60 Observations
  17. GRB 051211A and GRB051211B: BOOTES simultaneous observations
  18. GRB 051211B: Swift XRT Observations
  19. GRB 051210: Swift/UVOT upper limits
  20. GRB 051210: Magellan Imaging
  21. GRB 051211: TAROT optical limits
  22. GRB 051211B: a possible optical detection by TAROT
  23. GRB 051211: Swift XRT upper limit
  24. HETE SXC localization of GRB 051211 (=H3979)
  25. GRB 051210: SALT detection limit
  26. GRB 051210: Swift XRT refined analysis
  27. GRB 051210: FRAM early limit
  28. GRB 051210: Swift-BAT refined analysis of a short burst
  29. GRB051210: Swift UVOT Observation
  30. GRB 051210: A short GRB in a cluster?
  31. IPN observations of SGR1806-20
  32. Swift XRT positions
  33. An extraordinary long burst on December 3 from SGR1806-20
  34. GRB051117B: optical observation
  35. GRB051111: optical observaion
  36. Swift-BAT trigger 165579 is not a GRB
  37. GRB051117b: No Swift/UVOT Detection
  38. GRB051111: Rc optical observations: correction
  39. GRB 051117A: Swift/UVOT Detection of an Afterglow: Correction
  40. GRB 051117A: Swift/UVOT Detection of an Afterglow
  41. GRB051111: Rc optical observations
  42. GRB051008: Suzaku WAM observation of the prompt emission
  43. GRB 051109B: GAO 150cm telescope Optical limit
  44. GRB 051109A : GAO 150cm telescope Rc-band detection
  45. GRB 051021 Optical Observations
  46. GRB 051117B: MARGE Optical Limits
  47. GRB 051117A and B: Radio Observations
  48. GRB 051117B: R and I observations of possible host galaxy
  49. GRB 051117b: NIR observations
  50. GRB 051117A: Refined analysis of the Swift-BAT burst
  51. GRB 051117B: Refined analysis of the Swift-BAT burst
  52. GRB051117A : XRT refined analysis
  53. GRB 051117B: Lulin R and I band observation
  54. GRB 051117B: Optical observations
  55. GRB 051117B: ROTSE-III Optical Limits
  56. GRB051114: results of the Swift-XRT observation
  57. GRB 051028 Optical Observations
  58. GRB 051109B : Nainital upper limits
  59. GRB 051114: Radio Observations
  60. GRB 051114: Swift-BAT refined analysis
  61. GRB 051114: Swift-BAT detection of a short burst
  62. GRB 051111: Further spectroscopic analysis
  63. GRB 051111: Radio afterglow
  64. GRB 051113: Swift-BAT refined analysis
  65. GRB051103: Radio Observations
  66. GRB 051109A Milagro GeV/TeV Observations
  67. GRB/SGR 050925: XMM-Newton ToO observation
  68. GRB051111: Swift/UVOT Observations
  69. GRB 051111A : R-band temporal decay index based on Lulin
  70. GRB051111: XRT preliminary analysis
  71. GRB 051111: Swift-BAT refined analysis
  72. GRB 051109A Optical Observations
  73. GRB051111a: SARA Observations
  74. GRB 051111a: IR photometry
  75. GRB 051111A: KAIT optical observations
  76. GRB 051111a: Afterglow fading in Ic
  77. GRB051111: Super-LOTIS Early Detection
  78. GRB 051111: ROTSE-III Analysis of Prompt Counterpart
  79. GRB 051103 Milagro GeV/TeV Observations
  80. GRB 051111A: ROTSE-III Detection of Possible Counterpart
  81. GRB 051008 Tautenburg Supernova Search
  82. GRB 051109B. Radio Observations
  83. GRB 051109A
  84. GRB051109A - radio observations
  85. GRB 051105a: GETS optical limit
  86. GRB 051109b: GETS observation
  87. GRB 051109A: KAIT optical observations
  88. Early RAPTOR measurements of GRB 051109a - the movie.
  89. Konus-Wind observation of GRB 051109A
  90. GRB 051109B: Swift-BAT refined analysis
  91. GRB 051109B: ROTSE-III Optical Limits
  92. GRB 051109A: Swift-UVOT Observations
  93. GRB051109B: no UVOT source detected
  94. GRB051109B: XRT refined analysis
  95. GRB 051109B : Lulin Optical Observations
  96. GRB051109A: further steepening in the X-ray light curve
  97. GRB051109A: XRT refined analysis
  98. GRB 051109a: BOOTES R & I-band detection of the early afterglow
  99. GRB051109B: XRT position
  100. GRB 051109B Kiso optical follow-up observation

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