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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"

19278 results found.

  1. GRB 051227: optical afterglow
  2. GRB 051227: XRT refined analysis
  3. GRB 051227: Further analysis of the Swift-BAT burst
  4. GRB 051227: Refined analysis of the Swift-BAT burst
  5. GRB051227: SDSS pre-burst observations
  6. GRB 051227: Swift detection of a burst
  7. Konus-Wind observation of GRB 051221A
  8. GRB051221A: Suzaku WAM observation of the prompt emission
  9. GRB051016: analysis of the XMM-Newton observation
  10. GRB 051221A: Refined spectral and temporal analysis of the Swift-BAT short hard burst
  11. GRB 051221B: Refined analysis of the Swift-BAT burst
  12. GRB 051221B: BOOTES optical observations.
  13. GRB 051221: Swift XRT refined analysis
  14. GRB 051221: No variability in Gemini data
  15. GRB 051221: Refined analysis of the Swift-BAT short hard burst
  16. GRB 051221: Swift detection of a bright short burst
  17. GRB051211A (=H3979): Refined Analysis
  18. GRB 051211B: optical afterglow
  19. Swift detection of an RS CVn flare star
  20. GRB 051215: near-infrared observations
  21. GRB051215 - SDSS pre-burst observations
  22. GRB 051215: Swift detection of a possible burst
  23. GRB051105: optical observations
  24. GRB 051213: Swift-BAT refined analysis
  25. GRB051211B: XRT refined analysis
  26. GRB 051211A and GRB051211B: BOOTES simultaneous observations
  27. GRB 051211:IAC80 optical observations
  28. GRB 051210: Swift XRT refined analysis
  29. GRB 051210: Swift-BAT refined analysis of a short burst
  30. GRB 051210: Swift detection of a burst
  31. An extraordinary long burst on December 3 from SGR1806-20
  32. Possible resuming of the SGR 1806-20 activity
  33. GRB051117B: Swift XRT refined analysis
  34. GRB 051117A: Swift/UVOT Detection of an Afterglow: Correction
  35. GRB 051117A: Swift/UVOT Detection of an Afterglow
  36. GRB051111: Suzaku WAM observation of the prompt emission
  37. GRB051008: Suzaku WAM observation of the prompt emission
  38. GRB 051021 Optical Observations
  39. GRB 051117A: Refined analysis of the Swift-BAT burst
  40. GRB 051117B: Refined analysis of the Swift-BAT burst
  41. GRB 051117B,optical observation
  42. GRB 051117B: Lulin R and I band observation
  43. GRB 051114: Swift-BAT refined analysis
  44. GRB050925: analysis of the XMM-Newton observation
  45. GRB 051114: Swift-BAT detection of a short burst
  46. GRB 051111: Further spectroscopic analysis
  47. GRB 051113: Swift-BAT refined analysis
  48. GRB/SGR 050925: XMM-Newton ToO observation
  49. GRB051111: Swift/UVOT Observations
  50. GRB051111: XRT preliminary analysis
  51. GRB 051111: Swift-BAT refined analysis
  52. GRB 051109A Optical Observations
  53. GRB 051111A : Lulin BVRI multi band afterglow observation
  54. GRB051111a: SARA Observations
  55. Konus-Wind observation of GRB 051109A
  56. GRB 051109B: Swift-BAT refined analysis
  57. GRB 051109A: Swift-UVOT Observations
  58. IPN triangulation and Konus spectrum of the short/soft GRB051107 (large
  59. GRB051109B: XRT refined analysis
  60. GRB 051109B : Lulin Optical Observations
  61. GRB 051109A : Lulin BVRI Optical afterglow observation
  62. GRB051109A: further steepening in the X-ray light curve
  63. GRB051109A: XRT refined analysis
  64. GRB051105B: REM Optical observation
  65. GRB 051109B: Swift detection of a burst
  66. GRB 051109: Rc and Ic observations
  67. GRB 051109: Swift-BAT refined analysis
  68. GRB051105B: Swift/XRT upper limit
  69. GRB 051103, optical observations
  70. GRB051103: MASTER: OT limit and host galaxy candidates
  71. GRB051028: Swift-XRT refined analysis
  72. GRB 051105a: MDM Observations
  73. GRB 051105A: TNG optical observations
  74. GRB 051105A, radio observations
  75. GRB051103:_MASTER_optical_observations
  76. IPN triangulation and Konus spectrum of the bright short/hard GRB051103
  77. GRB 051105A, optical observations
  78. XRT observations of GRB 051105A
  79. GRB 051105b: ART optical limits
  80. GRB 051105B (INTEGRAL 2701): Optical observation
  81. Recent GRB UBVRcIc field photometry
  82. GRB051028: optical observations
  83. GRB051028:MASTER observations
  84. GRB 051028 (=H3951): A GRB localized by HETE
  85. SGR 1806-20: continued moderate activity seen with INTEGRAL
  86. GRB 051022: XRT Refined Spectral and Temporal Analysis
  87. GRB051012: Swift-XRT analysis
  88. GRB051021B: Swift XRT refined analysis
  89. GRB 051022, mm counterpart
  90. GRB051022: Radio Counterpart
  91. GRB051021A: Swift XRT refined analysis
  92. GRB051022: Optical Observations
  93. GRB051021b: Magellan IR Imaging
  94. GRB 051021, SMARTS optical/IR observations
  95. GRB 051021B: Refined analysis of the Swift-BAT burst
  96. GRB051021 (=H3947): Refined Analysis
  97. GRB 051021 : optical afterglow observation at Lulin
  98. GRB 051021: Optical observations and candidate afterglow
  99. GRB051021.63
  100. GRB051021.6: MASTER optical observation

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