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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"

36308 results found.

  1. GRB 051211:IAC80 optical observations
  2. HETE SXC localization of GRB 051211 (=H3979)
  3. GRB 051210: Optical imaging from Las Campanas
  4. GRB 051210: SALT detection limit
  5. GRB 051210: BAT further refined analysis of the short burst
  6. GRB 051210: Swift XRT refined analysis
  7. GRB 051210: FRAM early limit
  8. GRB 051210: Swift-BAT refined analysis of a short burst
  9. GRB 051210: A short GRB in a cluster?
  10. GRB 051210: Swift detection of a burst
  11. IPN observations of SGR1806-20
  12. An extraordinary long burst on December 3 from SGR1806-20
  13. IBAS Alert 2706 : not a real GRB
  14. GRB051117B: optical observation
  15. GRB051111: optical observaion
  16. Swift-BAT trigger 165579 is not a GRB
  17. GRB 051127: Swift-BAT detection of a possible burst
  18. GRB051117b: No Swift/UVOT Detection
  19. GRB 051117A: Swift/UVOT Detection of an Afterglow: Correction
  20. GRB 051117A: Swift/UVOT Detection of an Afterglow
  21. GRB051111: Suzaku WAM observation of the prompt emission
  22. GRB051008: Suzaku WAM observation of the prompt emission
  23. GRB 051109B: GAO 150cm telescope Optical limit
  24. GRB 051109A : GAO 150cm telescope Rc-band detection
  25. GRB 051021 Optical Observations
  26. GRB 051117B: MARGE Optical Limits
  27. GRB 051117A and B: Radio Observations
  28. GRB 051117B: R and I observations of possible host galaxy
  29. GRB 051117b: NIR observations
  30. GRB 051117A: Refined analysis of the Swift-BAT burst
  31. GRB 051117B: Refined analysis of the Swift-BAT burst
  32. GRB 051117B,optical observation
  33. GRB 051117B: Lulin R and I band observation
  34. GRB 051117B: Optical observations
  35. GRB 051117B: ROTSE-III Optical Limits
  36. GRB 051117B: Swift detection of a burst
  37. GRB 051117: Swift detection of a bright burst
  38. GRB 051028 Optical Observations
  39. GRB 051109B : Nainital upper limits
  40. GRB 051114: Radio Observations
  41. GRB 051114: Swift-BAT refined analysis
  42. GRB051109A optical observations
  43. GRB 051114: Swift-BAT detection of a short burst
  44. GRB 051111: Further spectroscopic analysis
  45. GRB 051111: Radio afterglow
  46. GRB 051113: Swift-BAT refined analysis
  47. GRB 051113: Swift-BAT detection of a burst
  48. GRB 051111: AEOS optical observations
  49. GRB051103: Radio Observations
  50. GRB 051109A Milagro GeV/TeV Observations
  51. GRB/SGR 050925: XMM-Newton ToO observation
  52. GRB051111: Swift/UVOT Observations
  53. GRB 051111A : R-band temporal decay index based on Lulin
  54. GRB 051111: Swift-BAT refined analysis
  55. GRB 051109A Optical Observations
  56. GRB 051111A : Lulin BVRI multi band afterglow observation
  57. GRB051111a: SARA Observations
  58. GRB 051111a: IR photometry
  59. GRB 051111: Keck HIRES redshift
  60. GRB 051111A: KAIT optical observations
  61. GRB 051111a: Afterglow fading in Ic
  62. GRB 051111: ROTSE-III Analysis of Prompt Counterpart
  63. GRB 051103 Milagro GeV/TeV Observations
  64. GRB 051111A: ROTSE-III Detection of Possible Counterpart
  65. GRB 051008 Tautenburg Supernova Search
  66. GRB 051109B. Radio Observations
  67. GRB 051109A
  68. GRB051109A - radio observations
  69. GRB 051105a: GETS optical limit
  70. GRB 051109b: GETS observation
  71. GRB 051109A: KAIT optical observations
  72. Early RAPTOR measurements of GRB 051109a - the movie.
  73. Konus-Wind observation of GRB 051109A
  74. GRB 051109B: Swift-BAT refined analysis
  75. GRB 051109B: ROTSE-III Optical Limits
  76. GRB 051109A: Swift-UVOT Observations
  77. IPN triangulation and Konus spectrum of the short/soft GRB051107 (large
  78. GRB 051109B : Lulin Optical Observations
  79. GRB 051109A : Lulin BVRI Optical afterglow observation
  80. GRB 051109a: BOOTES R & I-band detection of the early afterglow
  81. GRB051109B: XRT position
  82. GRB 051109B: Super-LOTIS Observations
  83. GRB 051109B Kiso optical follow-up observation
  84. GRB 051109B: Swift detection of a burst
  85. GRB 051109: HET Optical Spectrum and Absorption Redshift
  86. GRB 051109: PROMPT Detections
  87. GRB 051109: Rc and Ic observations
  88. GRB 051109: Swift-BAT refined analysis
  89. GRB 051109a: IR Photometry and Astrometry
  90. GRB 051109a: MDM Observations
  91. GRB 051109A: ROTSE-III Decline rate for Optical Counterpart
  92. GRB 051109a: IR Detections
  93. GRB 051109: ROTSE-III Detection of Possible Counterpart
  94. GRB051105B: Swift/XRT upper limit
  95. GRB051105B: Swift/UVOT upper limit
  96. GRB051103: optical observations
  97. GRB 051103, optical observations
  98. GRB051103: MASTER: OT limit and host galaxy candidates
  99. GRB 051105a, observation from Naini Tal and OSN
  100. GRB 051105A, 2nd epoch optical observations

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