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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"

41917 results found.

  1. GRB 051028 Optical Observations
  2. GRB 051109B : Nainital upper limits
  3. GRB 051114: Radio Observations
  4. GRB050925: analysis of the XMM-Newton observation
  5. GRB051109A optical observations
  6. GRB 051114: Swift-BAT detection of a short burst
  7. GRB 051111: Further spectroscopic analysis
  8. GRB 051111: Radio afterglow
  9. GRB 051113: Swift-BAT detection of a burst
  10. GRB 051111: AEOS optical observations
  11. GRB051103: Radio Observations
  12. GRB 051109A Milagro GeV/TeV Observations
  13. GRB/SGR 050925: XMM-Newton ToO observation
  14. GRB051111: Swift/UVOT Observations
  15. GRB 051111A : R-band temporal decay index based on Lulin
  16. GRB051111: XRT preliminary analysis
  17. GRB 051111: Swift-BAT refined analysis
  18. GRB 051109A Optical Observations
  19. GRB 051111A : Lulin BVRI multi band afterglow observation
  20. GRB051111a: SARA Observations
  21. GRB 051111a: IR photometry
  22. GRB 051111: Keck HIRES redshift
  23. GRB 051111A: KAIT optical observations
  24. GRB051111: Super-LOTIS Early Detection
  25. GRB 051111: ROTSE-III Analysis of Prompt Counterpart
  26. Faulkes Telescope R-band detection of GRB051111
  27. GRB 051103 Milagro GeV/TeV Observations
  28. GRB051111: Swift-BAT detection of a bright burst
  29. GRB 051111A: ROTSE-III Detection of Possible Counterpart
  30. GRB 051008 Tautenburg Supernova Search
  31. GRB 051109B. Radio Observations
  32. GRB 051109A
  33. GRB051109A - radio observations
  34. GRB 051109A: KAIT optical observations
  35. Konus-Wind observation of GRB 051109A
  36. GRB 051109A: Swift-UVOT Observations
  37. IPN triangulation and Konus spectrum of the short/soft GRB051107 (large
  38. GRB051109B: no UVOT source detected
  39. GRB051109B: XRT refined analysis
  40. GRB 051109B : Lulin Optical Observations
  41. GRB051109A: further steepening in the X-ray light curve
  42. GRB051109A: XRT refined analysis
  43. GRB 051109B: Super-LOTIS Observations
  44. GRB 051109B Kiso optical follow-up observation
  45. GRB051105B: REM Optical observation
  46. GRB 051109B: Swift detection of a burst
  47. GRB 051109: HET Optical Spectrum and Absorption Redshift
  48. GRB 051109: PROMPT Detections
  49. GRB 051109: Rc and Ic observations
  50. GRB051109: Early Super-LOTIS Detection
  51. GRB 051109: Swift-BAT refined analysis
  52. GRB 051109a: IR Photometry and Astrometry
  53. GRB 051109a: MDM Observations
  54. GRB 051109A: ROTSE-III Decline rate for Optical Counterpart
  55. GRB051109: Swift detection of a burst
  56. GRB 051109a: IR Detections
  57. GRB 051109: ROTSE-III Detection of Possible Counterpart
  58. GRB051105B: Swift/XRT upper limit
  59. GRB051105B: Swift/UVOT upper limit
  60. GRB051103: optical observations
  61. GRB 051103, optical observations
  62. GRB051103: MASTER: OT limit and host galaxy candidates
  63. GRB051028: Swift-XRT refined analysis
  64. GRB 051105a, observation from Naini Tal and OSN
  65. GRB 051105A, 2nd epoch optical observations
  66. GRB 051105a: MDM Observations
  67. GRB 051105A: TNG optical observations
  68. GRB051105A: Swift/UVOT Observations
  69. GRB 051105A, radio observations
  70. IPN triangulation and Konus spectrum of the bright short/hard GRB051103
  71. GRB 051105A, optical observations
  72. XRT observations of GRB 051105A
  73. GRB051105B - A long GRB detected by INTEGRAL
  74. GRB 051105: Swift-BAT refined analysis
  75. GRB 051105: Swift detection of a short burst
  76. GRB 051016B host spectroscopy and redshift
  77. GRB051016B: optical observation
  78. Recent GRB UBVRcIc field photometry
  79. Konus-Wind observation of GRB 051028
  80. GRB051028:MASTER correction and final results
  81. GRB 051022: RTT150 optical observations
  82. GRB 051021A: RTT150 optical observations
  83. GRB051028 SARA Observation
  84. GRB051028: optical observations
  85. GRB051028: Swift/UVOT upper limits
  86. GRB051028: WHT optical candidate
  87. GRB051028: Swift XRT Position
  88. GRB051028:MASTER observations
  89. GRB 051028 (=H3951): A GRB localized by HETE
  90. GRB051028:MASTER optical observations
  91. GRB051022: Swift XRT measurement of jet break
  92. SGR 1806-20: continued moderate activity seen with INTEGRAL
  93. GRB 051021, Optical Observations
  94. GRB 051022: XRT Refined Spectral and Temporal Analysis
  95. GRB 051022, refined optical astrometry
  96. Chandra Observations of GRB 051022
  97. GRB051012: Swift-XRT analysis
  98. GRB 051022 Chandra Observations scheduled
  99. GRB051021B: Swift XRT refined analysis
  100. GRB051021a: optical observations

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