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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"

26483 results found.

  1. GRB 051117: Swift detection of a bright burst
  2. GRB 051028 Optical Observations
  3. GRB 051114: Radio Observations
  4. GRB050925: analysis of the XMM-Newton observation
  5. GRB 051114: Swift-BAT detection of a short burst
  6. GRB 051111: Further spectroscopic analysis
  7. GRB 051111: Radio afterglow
  8. GRB051103: Radio Observations
  9. GRB 051109A Milagro GeV/TeV Observations
  10. GRB/SGR 050925: XMM-Newton ToO observation
  11. GRB051111: Swift/UVOT Observations
  12. GRB051111: XRT preliminary analysis
  13. GRB 051109A Optical Observations
  14. GRB051111a: SARA Observations
  15. GRB 051111A: KAIT optical observations
  16. GRB 051111a: Afterglow fading in Ic
  17. GRB051111: Super-LOTIS Early Detection
  18. GRB 051111: ROTSE-III Analysis of Prompt Counterpart
  19. GRB 051103 Milagro GeV/TeV Observations
  20. GRB 051008 Tautenburg Supernova Search
  21. GRB 051109B. Radio Observations
  22. GRB 051109A
  23. GRB 051105a: GETS optical limit
  24. GRB 051109b: GETS observation
  25. GRB 051109A: KAIT optical observations
  26. Early RAPTOR measurements of GRB 051109a - the movie.
  27. Konus-Wind observation of GRB 051109A
  28. GRB 051109B: ROTSE-III Optical Limits
  29. IPN triangulation and Konus spectrum of the short/soft GRB051107 (large
  30. GRB051109B: XRT refined analysis
  31. GRB 051109B : Lulin Optical Observations
  32. GRB051109A: XRT refined analysis
  33. GRB 051109a: BOOTES R & I-band detection of the early afterglow
  34. GRB 051109B: Super-LOTIS Observations
  35. GRB 051109B Kiso optical follow-up observation
  36. GRB 051109: Rc and Ic observations
  37. GRB051109: Early Super-LOTIS Detection
  38. GRB 051109a: MDM Observations
  39. GRB 051109A: ROTSE-III Decline rate for Optical Counterpart
  40. GRB 051109a: IR Detections
  41. GRB051105B: Swift/UVOT upper limit
  42. GRB 051103, optical observations
  43. GRB051103: MASTER: OT limit and host galaxy candidates
  44. GRB051028: Swift-XRT refined analysis
  45. GRB 051105a, observation from Naini Tal and OSN
  46. GRB 051105a: MDM Observations
  47. GRB 051105A: TNG optical observations
  48. GRB051105A: Swift/UVOT Observations
  49. GRB 051105A, radio observations
  50. GRB051103:_MASTER_optical_observations
  51. IPN triangulation and Konus spectrum of the bright short/hard GRB051103
  52. XRT observations of GRB 051105A
  53. GRB 051105b: ART optical limits
  54. GRB051105B - A long GRB detected by INTEGRAL
  55. GRB 051105B (INTEGRAL 2701): Optical observation
  56. GRB 051105: Optical limit
  57. GRB051016B: optical observation
  58. Konus-Wind observation of GRB 051028
  59. GRB051028:MASTER correction and final results
  60. GRB051028 SARA Observation
  61. GRB051028:MASTER observations
  62. GRB 051028 (=H3951): A GRB localized by HETE
  63. GRB051028:MASTER optical observations
  64. GRB 051022: XRT Refined Spectral and Temporal Analysis--Correction
  65. GRB051022: Swift XRT measurement of jet break
  66. SGR 1806-20: continued moderate activity seen with INTEGRAL
  67. GRB 051022: XRT Refined Spectral and Temporal Analysis
  68. Chandra Observations of GRB 051022
  69. GRB051012: Swift-XRT analysis
  70. GRB 051022 Chandra Observations scheduled
  71. GRB051021B: Swift XRT refined analysis
  72. GRB051022: host galaxy redshift
  73. GRB051022: Radio Counterpart
  74. GRB051021A: Swift XRT refined analysis
  75. Konus-Wind observation of GRB 051022
  76. GRB 051021, SMARTS optical/IR observations
  77. GRB 051021: P200 Ks Observations
  78. IPN triangulation of GRB051022 (=H3950)
  79. GRB 051021: MDM Upper Limit
  80. GRB 051022 (=H3950): SXC Flight Localization is Valid
  81. GRB051021: Swift/UVOT Upper Limits
  82. GRB051022 (=H3590), A GRB Detected By HETE
  83. GRB 051022: Optical observations
  84. GRB 051021,optical observation
  85. GRB051021: Swift XRT analysis
  86. GRB051021 (=H3947): Refined Analysis
  87. GRB 051021 : optical afterglow observation at Lulin
  88. GRB 051021: Optical observations
  89. GRB 051021: ROTSE-III Confirmation of Optical Counterpart
  90. GRB051021.63
  91. GRB051021.6: MASTER optical observation
  92. GRB051021: A GRB Localized by HETE
  93. Swift-BAT trigger 160619 is not a GRB
  94. GRB 050502b: Optical limit
  95. GRB 051016b: Optical limit
  96. Afterglow candidate of GRB 051016B observed at Lulin
  97. GRB 051016b: Gemini Near IR Observations
  98. GRB 051016B: refined analysis of the Swift/XRT data
  99. GRB 051016B: Swift/UVOT detection
  100. GRB 051016B: Swift detection of a soft burst

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