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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"

37256 results found.

  1. GRB 051211A,optical observation
  2. GRB 051211B: Swift XRT confirmation of the afterglow
  3. GRB051211B: Liverpool Telescope observation
  4. GRB 051211b: RTT150 optical observations
  5. GRB 051211A and GRB051211B: BOOTES simultaneous observations
  6. GRB 051211B: Swift XRT 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 051211B: a long GRB detected by INTEGRAL
  12. GRB 051211: Swift XRT upper limit
  13. GRB 051211:IAC80 optical observations
  14. HETE SXC localization of GRB 051211 (=H3979)
  15. GRB 051210: Optical imaging from Las Campanas
  16. GRB 051210: SALT detection limit
  17. GRB 051210: BAT further refined analysis of the short burst
  18. GRB 051210: Swift XRT refined analysis
  19. GRB 051210: FRAM early limit
  20. GRB 051210: Swift-BAT refined analysis of a short burst
  21. GRB 051210: A short GRB in a cluster?
  22. GRB 051210: Swift detection of a burst
  23. IPN observations of SGR1806-20
  24. An extraordinary long burst on December 3 from SGR1806-20
  25. IBAS Alert 2706 : not a real GRB
  26. Possible resuming of the SGR 1806-20 activity
  27. GRB051117B: optical observation
  28. GRB051111: optical observaion
  29. Swift-BAT trigger 165579 is not a GRB
  30. GRB 051127: Swift-BAT detection of a possible burst
  31. GRB051117B: Swift XRT refined analysis
  32. GRB051117b: No Swift/UVOT Detection
  33. GRB 051117A: Swift/UVOT Detection of an Afterglow: Correction
  34. GRB 051117A: Swift/UVOT Detection of an Afterglow
  35. GRB051111: Suzaku WAM observation of the prompt emission
  36. GRB051111: Rc optical observations
  37. GRB051008: Suzaku WAM observation of the prompt emission
  38. GRB 051109B: GAO 150cm telescope Optical limit
  39. GRB 051109A : GAO 150cm telescope Rc-band detection
  40. GRB 051021 Optical Observations
  41. GRB 051117B: MARGE Optical Limits
  42. GRB 051117A and B: Radio Observations
  43. GRB 051117B: R and I observations of possible host galaxy
  44. GRB 051117b: NIR observations
  45. GRB 051117A: Refined analysis of the Swift-BAT burst
  46. GRB 051117B: Refined analysis of the Swift-BAT burst
  47. GRB 051117B,optical observation
  48. GRB 051117B: Lulin R and I band observation
  49. GRB 051117B: Optical observations
  50. GRB 051117B: ROTSE-III Optical Limits
  51. GRB051117B: Swift XRT position
  52. GRB 051117B: Swift detection of a burst
  53. GRB 051117: Swift detection of a bright burst
  54. GRB 051028 Optical Observations
  55. GRB 051109B : Nainital upper limits
  56. GRB 051114: Radio Observations
  57. GRB 051114: Swift-BAT refined analysis
  58. GRB051109A optical observations
  59. GRB 051114: Swift-BAT detection of a short burst
  60. GRB 051111: Further spectroscopic analysis
  61. GRB 051111: Radio afterglow
  62. GRB 051113: Swift-BAT refined analysis
  63. GRB 051113: Swift-BAT detection of a burst
  64. GRB 051111: AEOS optical observations
  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. GRB 051111A : Lulin BVRI multi band afterglow observation
  74. GRB051111a: SARA Observations
  75. GRB 051111a: IR photometry
  76. GRB 051111: Keck HIRES redshift
  77. GRB 051111A: KAIT optical observations
  78. GRB 051111a: Afterglow fading in Ic
  79. GRB051111: Super-LOTIS Early Detection
  80. GRB 051111: ROTSE-III Analysis of Prompt Counterpart
  81. GRB 051103 Milagro GeV/TeV Observations
  82. GRB 051111A: ROTSE-III Detection of Possible Counterpart
  83. GRB 051008 Tautenburg Supernova Search
  84. GRB 051109B. Radio Observations
  85. GRB 051109A
  86. GRB051109A - radio observations
  87. GRB 051105a: GETS optical limit
  88. GRB 051109b: GETS observation
  89. GRB 051109A: KAIT optical observations
  90. Early RAPTOR measurements of GRB 051109a - the movie.
  91. Konus-Wind observation of GRB 051109A
  92. GRB 051109B: Swift-BAT refined analysis
  93. GRB 051109B: ROTSE-III Optical Limits
  94. GRB 051109A: Swift-UVOT Observations
  95. IPN triangulation and Konus spectrum of the short/soft GRB051107 (large
  96. GRB051109B: no UVOT source detected
  97. GRB 051109B : Lulin Optical Observations
  98. GRB 051109A : Lulin BVRI Optical afterglow observation
  99. GRB051109A: further steepening in the X-ray light curve
  100. GRB051109A: XRT refined analysis

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