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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"

24436 results found.

  1. GRB 051117B,optical observation
  2. GRB 051117B: Optical observations
  3. GRB 051117B: ROTSE-III Optical Limits
  4. GRB 051114: Swift-BAT refined analysis
  5. GRB051109A optical observations
  6. GRB 051113: Swift-BAT refined analysis
  7. GRB051111: Swift/UVOT Observations
  8. GRB 051111: Swift-BAT refined analysis
  9. GRB 051109A Optical Observations
  10. GRB051111a: SARA Observations
  11. GRB 051111A: KAIT optical observations
  12. GRB051111: Super-LOTIS Early Detection
  13. GRB 051111A: ROTSE-III Detection of Possible Counterpart
  14. Konus-Wind observation of GRB 051109A
  15. GRB 051109B: Swift-BAT refined analysis
  16. GRB 051109B: ROTSE-III Optical Limits
  17. IPN triangulation and Konus spectrum of the short/soft GRB051107 (large
  18. GRB051109B: no UVOT source detected
  19. GRB 051109B Kiso optical follow-up observation
  20. GRB051105B: REM Optical observation
  21. GRB 051109: PROMPT Detections
  22. GRB051109: Early Super-LOTIS Detection
  23. GRB 051109: Swift-BAT refined analysis
  24. GRB 051109A: ROTSE-III Decline rate for Optical Counterpart
  25. GRB 051109: ROTSE-III Detection of Possible Counterpart
  26. GRB051103: MASTER: OT limit and host galaxy candidates
  27. GRB051105A: Swift/UVOT Observations
  28. GRB051103:_MASTER_optical_observations
  29. IPN triangulation and Konus spectrum of the bright short/hard GRB051103
  30. GRB 051105: Swift-BAT improved refined analysis
  31. GRB051105B - A long GRB detected by INTEGRAL
  32. GRB 051105: Swift detection of a short burst
  33. IBAS Alert 2700: Not a GRB
  34. GRB051016B: optical observation
  35. Konus-Wind observation of GRB 051028
  36. GRB051028:MASTER correction and final results
  37. GRB051028: optical observations
  38. GRB051028:MASTER observations
  39. GRB051028:MASTER optical observations
  40. GRB051022: Swift XRT measurement of jet break
  41. SGR 1806-20: continued moderate activity seen with INTEGRAL
  42. GRB051021B: Swift/UVOT Upper limits
  43. GRB 051022: XRT Refined Spectral and Temporal Analysis
  44. GRB051012: Swift-XRT analysis
  45. GRB051021a: optical observations
  46. GRB 051022: Swift/UVOT Upper Limits
  47. GRB 051022: SOAR JKs Observations
  48. Konus-Wind observation of GRB 051022
  49. GRB051022: Optical Observations
  50. GRB 051021: PROMPT RcIc Observations
  51. GRB 051021, SMARTS optical/IR observations
  52. GRB 051022 (=H3950): SXC Flight Localization is Valid
  53. GRB051021: Swift/UVOT Upper Limits
  54. GRB 051022: SSO40 Optical Observations
  55. GRB051022,optical observation
  56. GRB 051022A: ROTSE-III Optical Limits
  57. GRB051022 (=H3590), A GRB Detected By HETE
  58. GRB 051021,optical observation
  59. GRB 051021: SOAR NIR Observations
  60. GRB051021: Swift XRT analysis
  61. GRB 051021: ROTSE-III Confirmation of Optical Counterpart
  62. GRB 051021: Optical observations and candidate afterglow
  63. GRB051021.63
  64. GRB051021.6: MASTER optical observation
  65. Swift-BAT trigger 160640 is not a real GRB
  66. GRB051021: A GRB Localized by HETE
  67. GRB 051016A: Swift/UVOT upper limits
  68. GRB 051016B: refined analysis of the Swift/XRT data
  69. GRB 051016: Swift-BAT refined analysis
  70. GRB051016: Swift XRT refined analysis.
  71. GRB 051016: PROMPT Observations
  72. GRB051006: optical observations
  73. GRB 051012: Swift-BAT detection of burst yesterday
  74. Swift-BAT Trigger 159578 is a possible burst
  75. GRB050805A: Rc optical observations
  76. IBAS Alert 2675 : not a GRB
  77. GRB051008: optical candidate
  78. GRB 051008: - a high redshift high-luminosity burst?
  79. GRB 051008 - a low redshift low-luminosity burst?
  80. IBAS Alert 2673: not a real GRB
  81. GRB051011: MASTER optical observation
  82. GRB051008: Swift XRT refined analysis
  83. GRB051008 - Swift UVOT upper limits
  84. Konus-Wind observation of GRB 051008
  85. GRB 051008: R-band upper limit
  86. GRB 051006: XRT refined analysis
  87. GRB 051006: optical observations at Sierra Nevada
  88. GRB 050906, summary of radio observations
  89. GRB 051001: I-band limit
  90. GRB 051001: AAT infra-red observations
  91. GRB 051001: Swift-BAT refined analysis
  92. GRB 051001: ROTSE-III Optical Limits
  93. GRB050908: optical observations
  94. GRB050922B: optical limit
  95. GRB050922C: UVES/VLT high resolution spectroscopy
  96. GRB050922C - Swift UVOT preliminary analysis
  97. GRB050925: Swift UVOT upper limits
  98. Refined analysis of the Swift-BAT soft short burst
  99. GRB050925: Faulkes Telescope North R-band limit
  100. GRB050925: Swift-BAT detection of a short burst

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