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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"

24454 results found.

  1. GRB 051211:IAC80 optical observations
  2. HETE SXC localization of GRB 051211 (=H3979)
  3. GRB 051210: Swift-BAT refined analysis of a short burst
  4. IPN observations of SGR1806-20
  5. Swift XRT positions
  6. An extraordinary long burst on December 3 from SGR1806-20
  7. IBAS Alert 2706 : not a real GRB
  8. Possible resuming of the SGR 1806-20 activity
  9. GRB051117B: optical observation
  10. GRB051111: optical observaion
  11. Swift-BAT trigger 165579 is not a GRB
  12. GRB 051127: Swift-BAT detection of a possible burst
  13. GRB051117B: Swift XRT refined analysis
  14. GRB051117b: No Swift/UVOT Detection
  15. GRB051111: Suzaku WAM observation of the prompt emission
  16. GRB051111: Rc optical observations
  17. GRB051008: Suzaku WAM observation of the prompt emission
  18. GRB 051117B: MARGE Optical Limits
  19. GRB 051117B,optical observation
  20. GRB 051117B: Optical observations
  21. GRB 051117B: ROTSE-III Optical Limits
  22. GRB 051114: Swift-BAT refined analysis
  23. GRB051109A optical observations
  24. GRB 051113: Swift-BAT refined analysis
  25. GRB051111: Swift/UVOT Observations
  26. GRB 051111: Swift-BAT refined analysis
  27. GRB 051109A Optical Observations
  28. GRB051111a: SARA Observations
  29. GRB 051111A: KAIT optical observations
  30. GRB051111: Super-LOTIS Early Detection
  31. GRB 051111A: ROTSE-III Detection of Possible Counterpart
  32. Konus-Wind observation of GRB 051109A
  33. GRB 051109B: Swift-BAT refined analysis
  34. GRB 051109B: ROTSE-III Optical Limits
  35. IPN triangulation and Konus spectrum of the short/soft GRB051107 (large
  36. GRB051109B: no UVOT source detected
  37. GRB 051109B Kiso optical follow-up observation
  38. GRB051105B: REM Optical observation
  39. GRB 051109: PROMPT Detections
  40. GRB051109: Early Super-LOTIS Detection
  41. GRB 051109: Swift-BAT refined analysis
  42. GRB 051109A: ROTSE-III Decline rate for Optical Counterpart
  43. GRB 051109: ROTSE-III Detection of Possible Counterpart
  44. GRB051103: MASTER: OT limit and host galaxy candidates
  45. GRB051105A: Swift/UVOT Observations
  46. GRB051103:_MASTER_optical_observations
  47. IPN triangulation and Konus spectrum of the bright short/hard GRB051103
  48. GRB 051105: Swift-BAT improved refined analysis
  49. GRB051105B - A long GRB detected by INTEGRAL
  50. GRB 051105: Swift detection of a short burst
  51. IBAS Alert 2700: Not a GRB
  52. GRB051016B: optical observation
  53. Konus-Wind observation of GRB 051028
  54. GRB051028:MASTER correction and final results
  55. GRB051028: optical observations
  56. GRB051028:MASTER observations
  57. GRB051028:MASTER optical observations
  58. GRB051022: Swift XRT measurement of jet break
  59. SGR 1806-20: continued moderate activity seen with INTEGRAL
  60. GRB051021B: Swift/UVOT Upper limits
  61. GRB 051022: XRT Refined Spectral and Temporal Analysis
  62. GRB051012: Swift-XRT analysis
  63. GRB051021a: optical observations
  64. GRB 051022: Swift/UVOT Upper Limits
  65. GRB 051022: SOAR JKs Observations
  66. Konus-Wind observation of GRB 051022
  67. GRB051022: Optical Observations
  68. GRB 051021: PROMPT RcIc Observations
  69. GRB 051021, SMARTS optical/IR observations
  70. GRB 051022 (=H3950): SXC Flight Localization is Valid
  71. GRB051021: Swift/UVOT Upper Limits
  72. GRB 051022: SSO40 Optical Observations
  73. GRB051022,optical observation
  74. GRB 051022A: ROTSE-III Optical Limits
  75. GRB051022 (=H3590), A GRB Detected By HETE
  76. GRB 051021,optical observation
  77. GRB 051021: SOAR NIR Observations
  78. GRB051021: Swift XRT analysis
  79. GRB 051021: ROTSE-III Confirmation of Optical Counterpart
  80. GRB 051021: Optical observations and candidate afterglow
  81. GRB051021.63
  82. GRB051021.6: MASTER optical observation
  83. Swift-BAT trigger 160640 is not a real GRB
  84. GRB051021: A GRB Localized by HETE
  85. GRB 051016A: Swift/UVOT upper limits
  86. GRB 051016B: refined analysis of the Swift/XRT data
  87. GRB 051016: Swift-BAT refined analysis
  88. GRB051016: Swift XRT refined analysis.
  89. GRB 051016: PROMPT Observations
  90. GRB051006: optical observations
  91. GRB 051012: Swift-BAT detection of burst yesterday
  92. Swift-BAT Trigger 159578 is a possible burst
  93. GRB050805A: Rc optical observations
  94. IBAS Alert 2675 : not a GRB
  95. GRB051008: optical candidate
  96. GRB 051008: - a high redshift high-luminosity burst?
  97. GRB 051008 - a low redshift low-luminosity burst?
  98. IBAS Alert 2673: not a real GRB
  99. GRB051011: MASTER optical observation
  100. GRB051008: Swift XRT refined analysis

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