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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"

26505 results found.

  1. GRB 051211B: a possible optical detection by TAROT
  2. GRB 051211B: a long GRB detected by INTEGRAL
  3. GRB 051210: Swift XRT refined analysis
  4. GRB 051210: FRAM early limit
  5. Swift XRT positions
  6. An extraordinary long burst on December 3 from SGR1806-20
  7. Possible resuming of the SGR 1806-20 activity
  8. GRB051117B: optical observation
  9. GRB051117B: Swift XRT refined analysis
  10. GRB051111: Rc optical observations: correction
  11. GRB 051117A: Swift/UVOT Detection of an Afterglow
  12. GRB051111: Suzaku WAM observation of the prompt emission
  13. GRB051111: Rc optical observations
  14. GRB051008: Suzaku WAM observation of the prompt emission
  15. GRB 051109A : GAO 150cm telescope Rc-band detection
  16. GRB 051021 Optical Observations
  17. GRB 051117A and B: Radio Observations
  18. GRB 051117B: R and I observations of possible host galaxy
  19. GRB051117A : XRT refined analysis
  20. GRB 051117B,optical observation
  21. GRB 051117B: Optical observations
  22. GRB 051117B: ROTSE-III Optical Limits
  23. GRB 051117: Swift detection of a bright burst
  24. GRB 051028 Optical Observations
  25. GRB 051114: Radio Observations
  26. GRB050925: analysis of the XMM-Newton observation
  27. GRB 051114: Swift-BAT detection of a short burst
  28. GRB 051111: Further spectroscopic analysis
  29. GRB 051111: Radio afterglow
  30. GRB051103: Radio Observations
  31. GRB 051109A Milagro GeV/TeV Observations
  32. GRB/SGR 050925: XMM-Newton ToO observation
  33. GRB051111: Swift/UVOT Observations
  34. GRB051111: XRT preliminary analysis
  35. GRB 051109A Optical Observations
  36. GRB051111a: SARA Observations
  37. GRB 051111A: KAIT optical observations
  38. GRB 051111a: Afterglow fading in Ic
  39. GRB051111: Super-LOTIS Early Detection
  40. GRB 051111: ROTSE-III Analysis of Prompt Counterpart
  41. GRB 051103 Milagro GeV/TeV Observations
  42. GRB 051008 Tautenburg Supernova Search
  43. GRB 051109B. Radio Observations
  44. GRB 051109A
  45. GRB 051105a: GETS optical limit
  46. GRB 051109b: GETS observation
  47. GRB 051109A: KAIT optical observations
  48. Early RAPTOR measurements of GRB 051109a - the movie.
  49. Konus-Wind observation of GRB 051109A
  50. GRB 051109B: ROTSE-III Optical Limits
  51. IPN triangulation and Konus spectrum of the short/soft GRB051107 (large
  52. GRB051109B: XRT refined analysis
  53. GRB 051109B : Lulin Optical Observations
  54. GRB051109A: XRT refined analysis
  55. GRB 051109a: BOOTES R & I-band detection of the early afterglow
  56. GRB 051109B: Super-LOTIS Observations
  57. GRB 051109B Kiso optical follow-up observation
  58. GRB 051109: Rc and Ic observations
  59. GRB051109: Early Super-LOTIS Detection
  60. GRB 051109a: MDM Observations
  61. GRB 051109A: ROTSE-III Decline rate for Optical Counterpart
  62. GRB 051109a: IR Detections
  63. GRB051105B: Swift/UVOT upper limit
  64. GRB 051103, optical observations
  65. GRB051103: MASTER: OT limit and host galaxy candidates
  66. GRB051028: Swift-XRT refined analysis
  67. GRB 051105a, observation from Naini Tal and OSN
  68. GRB 051105a: MDM Observations
  69. GRB 051105A: TNG optical observations
  70. GRB051105A: Swift/UVOT Observations
  71. GRB 051105A, radio observations
  72. GRB051103:_MASTER_optical_observations
  73. IPN triangulation and Konus spectrum of the bright short/hard GRB051103
  74. XRT observations of GRB 051105A
  75. GRB 051105b: ART optical limits
  76. GRB051105B - A long GRB detected by INTEGRAL
  77. GRB 051105B (INTEGRAL 2701): Optical observation
  78. GRB 051105: Optical limit
  79. GRB051016B: optical observation
  80. Konus-Wind observation of GRB 051028
  81. GRB051028:MASTER correction and final results
  82. GRB051028 SARA Observation
  83. GRB051028:MASTER observations
  84. GRB 051028 (=H3951): A GRB localized by HETE
  85. GRB051028:MASTER optical observations
  86. GRB 051022: XRT Refined Spectral and Temporal Analysis--Correction
  87. GRB051022: Swift XRT measurement of jet break
  88. SGR 1806-20: continued moderate activity seen with INTEGRAL
  89. GRB 051022: XRT Refined Spectral and Temporal Analysis
  90. Chandra Observations of GRB 051022
  91. GRB051012: Swift-XRT analysis
  92. GRB 051022 Chandra Observations scheduled
  93. GRB051021B: Swift XRT refined analysis
  94. GRB051022: host galaxy redshift
  95. GRB051022: Radio Counterpart
  96. GRB051021A: Swift XRT refined analysis
  97. Konus-Wind observation of GRB 051022
  98. GRB 051021, SMARTS optical/IR observations
  99. GRB 051021: P200 Ks Observations
  100. IPN triangulation of GRB051022 (=H3950)

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