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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"

37700 results found.

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

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