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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"

32685 results found.

  1. GRB051211B, RBO optical observations
  2. GRB 051211A: Swift/UVOT upper limits
  3. GRB 051211B: Swift/UVOT upper limits - correction
  4. GRB 051211B: Swift/UVOT upper limits
  5. GRB 051211A,optical observation
  6. GRB 051211B: Swift XRT confirmation of the afterglow
  7. GRB051211B: Liverpool Telescope observation
  8. GRB 051211b: RTT150 optical observations
  9. GRB051211b: P60 Observations
  10. GRB 051211A and GRB051211B: BOOTES simultaneous observations
  11. GRB 051211B: Swift XRT Observations
  12. GRB 051210: Swift/UVOT upper limits
  13. GRB 051210: Magellan Imaging
  14. GRB 051211: TAROT optical limits
  15. GRB 051211B: a possible optical detection by TAROT
  16. GRB 051211: Swift XRT upper limit
  17. HETE SXC localization of GRB 051211 (=H3979)
  18. GRB 051210: SALT detection limit
  19. GRB 051210: Swift XRT refined analysis
  20. GRB 051210: FRAM early limit
  21. GRB 051210: Swift-BAT refined analysis of a short burst
  22. GRB051210: Swift UVOT Observation
  23. GRB 051210: A short GRB in a cluster?
  24. IPN observations of SGR1806-20
  25. Swift XRT positions
  26. An extraordinary long burst on December 3 from SGR1806-20
  27. GRB051117B: optical observation
  28. GRB051111: optical observaion
  29. Swift-BAT trigger 165579 is not a GRB
  30. GRB051117b: No Swift/UVOT Detection
  31. GRB051111: Rc optical observations: correction
  32. GRB 051117A: Swift/UVOT Detection of an Afterglow: Correction
  33. GRB 051117A: Swift/UVOT Detection of an Afterglow
  34. GRB051111: Rc optical observations
  35. GRB051008: Suzaku WAM observation of the prompt emission
  36. GRB 051109B: GAO 150cm telescope Optical limit
  37. GRB 051109A : GAO 150cm telescope Rc-band detection
  38. GRB 051021 Optical Observations
  39. GRB 051117B: MARGE Optical Limits
  40. GRB 051117A and B: Radio Observations
  41. GRB 051117B: R and I observations of possible host galaxy
  42. GRB 051117b: NIR observations
  43. GRB 051117A: Refined analysis of the Swift-BAT burst
  44. GRB 051117B: Refined analysis of the Swift-BAT burst
  45. GRB051117A : XRT refined analysis
  46. GRB 051117B: Lulin R and I band observation
  47. GRB 051117B: Optical observations
  48. GRB 051117B: ROTSE-III Optical Limits
  49. GRB051114: results of the Swift-XRT observation
  50. GRB 051028 Optical Observations
  51. GRB 051109B : Nainital upper limits
  52. GRB 051114: Radio Observations
  53. GRB 051114: Swift-BAT refined analysis
  54. GRB 051114: Swift-BAT detection of a short burst
  55. GRB 051111: Further spectroscopic analysis
  56. GRB 051111: Radio afterglow
  57. GRB 051113: Swift-BAT refined analysis
  58. GRB051103: Radio Observations
  59. GRB 051109A Milagro GeV/TeV Observations
  60. GRB/SGR 050925: XMM-Newton ToO observation
  61. GRB051111: Swift/UVOT Observations
  62. GRB 051111A : R-band temporal decay index based on Lulin
  63. GRB051111: XRT preliminary analysis
  64. GRB 051111: Swift-BAT refined analysis
  65. GRB 051109A Optical Observations
  66. GRB051111a: SARA Observations
  67. GRB 051111a: IR photometry
  68. GRB 051111A: KAIT optical observations
  69. GRB 051111a: Afterglow fading in Ic
  70. GRB051111: Super-LOTIS Early Detection
  71. GRB 051111: ROTSE-III Analysis of Prompt Counterpart
  72. GRB 051103 Milagro GeV/TeV Observations
  73. GRB 051111A: ROTSE-III Detection of Possible Counterpart
  74. GRB 051008 Tautenburg Supernova Search
  75. GRB 051109B. Radio Observations
  76. GRB 051109A
  77. GRB051109A - radio observations
  78. GRB 051105a: GETS optical limit
  79. GRB 051109b: GETS observation
  80. GRB 051109A: KAIT optical observations
  81. Early RAPTOR measurements of GRB 051109a - the movie.
  82. Konus-Wind observation of GRB 051109A
  83. GRB 051109B: Swift-BAT refined analysis
  84. GRB 051109B: ROTSE-III Optical Limits
  85. GRB 051109A: Swift-UVOT Observations
  86. GRB051109B: no UVOT source detected
  87. GRB051109B: XRT refined analysis
  88. GRB 051109B : Lulin Optical Observations
  89. GRB051109A: further steepening in the X-ray light curve
  90. GRB051109A: XRT refined analysis
  91. GRB 051109a: BOOTES R & I-band detection of the early afterglow
  92. GRB051109B: XRT position
  93. GRB 051109B Kiso optical follow-up observation
  94. GRB 051109: HET Optical Spectrum and Absorption Redshift
  95. GRB 051109: PROMPT Detections
  96. GRB 051109: Rc and Ic observations
  97. GRB051109: Early Super-LOTIS Detection
  98. GRB 051109: Swift-BAT refined analysis
  99. GRB 051109a: MDM Observations
  100. GRB 051109A: ROTSE-III Decline rate for Optical Counterpart

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