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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"

36010 results found.

  1. GRB 051211A and GRB051211B: BOOTES simultaneous observations
  2. GRB 051211B: Swift XRT Observations
  3. GRB 051210: Swift/UVOT upper limits
  4. GRB 051210: Magellan Imaging
  5. GRB 051211: TAROT optical limits
  6. GRB 051211B: a possible optical detection by TAROT
  7. GRB 051211B: a long GRB detected by INTEGRAL
  8. GRB 051211: Swift XRT upper limit
  9. GRB 051211:IAC80 optical observations
  10. HETE SXC localization of GRB 051211 (=H3979)
  11. GRB 051210: Optical imaging from Las Campanas
  12. GRB 051210: SALT detection limit
  13. GRB 051210: BAT further refined analysis of the short burst
  14. GRB 051210: Swift XRT refined analysis
  15. GRB 051210: FRAM early limit
  16. GRB 051210: Swift-BAT refined analysis of a short burst
  17. GRB 051210: A short GRB in a cluster?
  18. GRB 051210: Swift detection of a burst
  19. IPN observations of SGR1806-20
  20. An extraordinary long burst on December 3 from SGR1806-20
  21. IBAS Alert 2706 : not a real GRB
  22. GRB051117B: optical observation
  23. GRB051111: optical observaion
  24. Swift-BAT trigger 165579 is not a GRB
  25. GRB 051127: Swift-BAT detection of a possible burst
  26. GRB051117b: No Swift/UVOT Detection
  27. GRB 051117A: Swift/UVOT Detection of an Afterglow: Correction
  28. GRB 051117A: Swift/UVOT Detection of an Afterglow
  29. GRB051111: Suzaku WAM observation of the prompt emission
  30. GRB051008: Suzaku WAM observation of the prompt emission
  31. GRB 051109B: GAO 150cm telescope Optical limit
  32. GRB 051109A : GAO 150cm telescope Rc-band detection
  33. GRB 051021 Optical Observations
  34. GRB 051117B: MARGE Optical Limits
  35. GRB 051117A and B: Radio Observations
  36. GRB 051117B: R and I observations of possible host galaxy
  37. GRB 051117b: NIR observations
  38. GRB 051117A: Refined analysis of the Swift-BAT burst
  39. GRB 051117B: Refined analysis of the Swift-BAT burst
  40. GRB 051117B,optical observation
  41. GRB 051117B: Lulin R and I band observation
  42. GRB 051117B: Optical observations
  43. GRB 051117B: ROTSE-III Optical Limits
  44. GRB 051117B: Swift detection of a burst
  45. GRB 051117: Swift detection of a bright burst
  46. GRB 051028 Optical Observations
  47. GRB 051109B : Nainital upper limits
  48. GRB 051114: Radio Observations
  49. GRB 051114: Swift-BAT refined analysis
  50. GRB051109A optical observations
  51. GRB 051114: Swift-BAT detection of a short burst
  52. GRB 051111: Further spectroscopic analysis
  53. GRB 051111: Radio afterglow
  54. GRB 051113: Swift-BAT refined analysis
  55. GRB 051113: Swift-BAT detection of a burst
  56. GRB 051111: AEOS optical observations
  57. GRB051103: Radio Observations
  58. GRB 051109A Milagro GeV/TeV Observations
  59. GRB/SGR 050925: XMM-Newton ToO observation
  60. GRB051111: Swift/UVOT Observations
  61. GRB 051111A : R-band temporal decay index based on Lulin
  62. GRB 051111: Swift-BAT refined analysis
  63. GRB 051109A Optical Observations
  64. GRB 051111A : Lulin BVRI multi band afterglow observation
  65. GRB051111a: SARA Observations
  66. GRB 051111a: IR photometry
  67. GRB 051111: Keck HIRES redshift
  68. GRB 051111A: KAIT optical observations
  69. GRB 051111a: Afterglow fading in Ic
  70. GRB 051111: ROTSE-III Analysis of Prompt Counterpart
  71. GRB 051103 Milagro GeV/TeV Observations
  72. GRB 051111A: ROTSE-III Detection of Possible Counterpart
  73. GRB 051008 Tautenburg Supernova Search
  74. GRB 051109B. Radio Observations
  75. GRB 051109A
  76. GRB051109A - radio observations
  77. GRB 051105a: GETS optical limit
  78. GRB 051109b: GETS observation
  79. GRB 051109A: KAIT optical observations
  80. Early RAPTOR measurements of GRB 051109a - the movie.
  81. Konus-Wind observation of GRB 051109A
  82. GRB 051109B: Swift-BAT refined analysis
  83. GRB 051109B: ROTSE-III Optical Limits
  84. GRB 051109A: Swift-UVOT Observations
  85. IPN triangulation and Konus spectrum of the short/soft GRB051107 (large
  86. GRB 051109B : Lulin Optical Observations
  87. GRB 051109A : Lulin BVRI Optical afterglow observation
  88. GRB 051109a: BOOTES R & I-band detection of the early afterglow
  89. GRB051109B: XRT position
  90. GRB 051109B: Super-LOTIS Observations
  91. GRB 051109B Kiso optical follow-up observation
  92. GRB 051109B: Swift detection of a burst
  93. GRB 051109: HET Optical Spectrum and Absorption Redshift
  94. GRB 051109: PROMPT Detections
  95. GRB 051109: Rc and Ic observations
  96. GRB 051109: Swift-BAT refined analysis
  97. GRB 051109a: IR Photometry and Astrometry
  98. GRB 051109a: MDM Observations
  99. GRB 051109A: ROTSE-III Decline rate for Optical Counterpart
  100. GRB 051109a: IR Detections

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