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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"

42008 results found.

  1. GRB 051211B: optical afterglow
  2. Swift detection of an RS CVn flare star
  3. GRB051211A: possible optical candidate
  4. Swift Trigger 172767 is not a GRB
  5. GRB 051215: near-infrared observations
  6. GRB051215 - SDSS pre-burst observations
  7. GRB 051215: Swift detection of a possible burst
  8. GRB 051215: A short GRB in a cluster?
  9. GRB051211B: Probable radio afterglow
  10. GRB051105: optical observations
  11. GRB 051213: Swift-BAT refined analysis
  12. GRB051211B: XRT refined analysis
  13. GRB 051213: Swift-BAT detection of a burst
  14. GRB 051211a: RTT150 optical observations
  15. GRB051211B, RBO optical observations
  16. GRB 051211A: Swift/UVOT upper limits
  17. GRB 051211B: Swift/UVOT upper limits - correction
  18. GRB 051211B: Swift/UVOT upper limits
  19. GRB 051211A,optical observation
  20. GRB 051211B: Swift XRT confirmation of the afterglow
  21. GRB051211B: Liverpool Telescope observation
  22. GRB 051211b: RTT150 optical observations
  23. GRB051211b: P60 Observations
  24. GRB 051211A and GRB051211B: BOOTES simultaneous observations
  25. GRB 051211B: Swift XRT Observations
  26. GRB 051210: Swift/UVOT upper limits
  27. GRB 051210: Magellan Imaging
  28. GRB 051211: TAROT optical limits
  29. GRB 051211B: a possible optical detection by TAROT
  30. GRB 051211B: a long GRB detected by INTEGRAL
  31. GRB 051211: Swift XRT upper limit
  32. GRB 051211:IAC80 optical observations
  33. HETE SXC localization of GRB 051211 (=H3979)
  34. GRB 051210: Optical imaging from Las Campanas
  35. GRB 051210: SALT detection limit
  36. GRB 051210: BAT further refined analysis of the short burst
  37. GRB 051210: Swift XRT refined analysis
  38. GRB 051210: FRAM early limit
  39. GRB 051210: Swift-BAT refined analysis of a short burst
  40. GRB051210: Swift UVOT Observation
  41. GRB 051210: A short GRB in a cluster?
  42. GRB 051210: Swift detection of a burst
  43. IPN observations of SGR1806-20
  44. Swift XRT positions
  45. An extraordinary long burst on December 3 from SGR1806-20
  46. Possible resuming of the SGR 1806-20 activity
  47. GRB051117B: optical observation
  48. GRB051111: optical observaion
  49. Swift-BAT trigger 165579 is not a GRB
  50. GRB 051127: Swift-BAT detection of a possible burst
  51. GRB051117B: Swift XRT refined analysis
  52. GRB051117b: No Swift/UVOT Detection
  53. GRB051111: Rc optical observations: correction
  54. GRB 051117A: Swift/UVOT Detection of an Afterglow: Correction
  55. GRB 051117A: Swift/UVOT Detection of an Afterglow
  56. GRB051111: Suzaku WAM observation of the prompt emission
  57. GRB051111: Rc optical observations
  58. GRB051008: Suzaku WAM observation of the prompt emission
  59. GRB 051109B: GAO 150cm telescope Optical limit
  60. GRB 051109A : GAO 150cm telescope Rc-band detection
  61. GRB 051021 Optical Observations
  62. GRB 051117B: MARGE Optical Limits
  63. GRB 051117A and B: Radio Observations
  64. GRB 051117B: R and I observations of possible host galaxy
  65. GRB 051117b: NIR observations
  66. GRB 051117A: Refined analysis of the Swift-BAT burst
  67. GRB 051117B: Refined analysis of the Swift-BAT burst
  68. GRB051117A : XRT refined analysis
  69. GRB 051117B,optical observation
  70. GRB 051117B: Lulin R and I band observation
  71. GRB 051117B: Optical observations
  72. GRB 051117B: ROTSE-III Optical Limits
  73. GRB 051117B: Swift detection of a burst
  74. GRB 051117: Swift detection of a bright burst
  75. GRB051114: results of the Swift-XRT observation
  76. GRB 051028 Optical Observations
  77. GRB 051109B : Nainital upper limits
  78. GRB 051114: Radio Observations
  79. GRB 051114: Swift-BAT refined analysis
  80. GRB050925: analysis of the XMM-Newton observation
  81. GRB051109A optical observations
  82. GRB 051114: Swift-BAT detection of a short burst
  83. GRB 051111: Further spectroscopic analysis
  84. GRB 051111: Radio afterglow
  85. GRB 051113: Swift-BAT refined analysis
  86. GRB 051111: AEOS optical observations
  87. GRB051103: Radio Observations
  88. GRB 051109A Milagro GeV/TeV Observations
  89. GRB/SGR 050925: XMM-Newton ToO observation
  90. GRB051111: Swift/UVOT Observations
  91. GRB 051111A : R-band temporal decay index based on Lulin
  92. GRB051111: XRT preliminary analysis
  93. GRB 051111: Swift-BAT refined analysis
  94. GRB 051109A Optical Observations
  95. GRB 051111A : Lulin BVRI multi band afterglow observation
  96. GRB051111a: SARA Observations
  97. GRB 051111a: IR photometry
  98. GRB 051111A: KAIT optical observations
  99. GRB 051111a: Afterglow fading in Ic
  100. GRB051111: Super-LOTIS Early Detection

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