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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"

19282 results found.

  1. GRB 060102: Swift-BAT refined analysis
  2. GRB 060102: Swift-BAT detection of a burst
  3. GRB 051221B: Optical Observations with Kuiper 1.54m
  4. GRB 051227: Likely host galaxy underlying afterglow position
  5. GRB 051227: optical afterglow
  6. GRB 051227: XRT refined analysis
  7. GRB 051227: Further analysis of the Swift-BAT burst
  8. GRB 051227: Refined analysis of the Swift-BAT burst
  9. GRB051227: SDSS pre-burst observations
  10. GRB 051227: Swift detection of a burst
  11. Konus-Wind observation of GRB 051221A
  12. GRB051221A: Suzaku WAM observation of the prompt emission
  13. GRB051016: analysis of the XMM-Newton observation
  14. GRB 051221A: Refined spectral and temporal analysis of the Swift-BAT short hard burst
  15. GRB 051221B: Refined analysis of the Swift-BAT burst
  16. GRB 051221B: BOOTES optical observations.
  17. GRB 051221: Swift XRT refined analysis
  18. GRB 051221: No variability in Gemini data
  19. GRB 051221: Refined analysis of the Swift-BAT short hard burst
  20. GRB 051221: Swift detection of a bright short burst
  21. GRB051211A (=H3979): Refined Analysis
  22. GRB 051211B: optical afterglow
  23. Swift detection of an RS CVn flare star
  24. GRB 051215: near-infrared observations
  25. GRB051215 - SDSS pre-burst observations
  26. GRB 051215: Swift detection of a possible burst
  27. GRB051105: optical observations
  28. GRB 051213: Swift-BAT refined analysis
  29. GRB051211B: XRT refined analysis
  30. GRB 051211A and GRB051211B: BOOTES simultaneous observations
  31. GRB 051211:IAC80 optical observations
  32. GRB 051210: Swift XRT refined analysis
  33. GRB 051210: Swift-BAT refined analysis of a short burst
  34. GRB 051210: Swift detection of a burst
  35. An extraordinary long burst on December 3 from SGR1806-20
  36. Possible resuming of the SGR 1806-20 activity
  37. GRB051117B: Swift XRT refined analysis
  38. GRB 051117A: Swift/UVOT Detection of an Afterglow: Correction
  39. GRB 051117A: Swift/UVOT Detection of an Afterglow
  40. GRB051111: Suzaku WAM observation of the prompt emission
  41. GRB051008: Suzaku WAM observation of the prompt emission
  42. GRB 051021 Optical Observations
  43. GRB 051117A: Refined analysis of the Swift-BAT burst
  44. GRB 051117B: Refined analysis of the Swift-BAT burst
  45. GRB 051117B,optical observation
  46. GRB 051117B: Lulin R and I band observation
  47. GRB 051114: Swift-BAT refined analysis
  48. GRB050925: analysis of the XMM-Newton observation
  49. GRB 051114: Swift-BAT detection of a short burst
  50. GRB 051111: Further spectroscopic analysis
  51. GRB 051113: Swift-BAT refined analysis
  52. GRB/SGR 050925: XMM-Newton ToO observation
  53. GRB051111: Swift/UVOT Observations
  54. GRB051111: XRT preliminary analysis
  55. GRB 051111: Swift-BAT refined analysis
  56. GRB 051109A Optical Observations
  57. GRB 051111A : Lulin BVRI multi band afterglow observation
  58. GRB051111a: SARA Observations
  59. Konus-Wind observation of GRB 051109A
  60. GRB 051109B: Swift-BAT refined analysis
  61. GRB 051109A: Swift-UVOT Observations
  62. IPN triangulation and Konus spectrum of the short/soft GRB051107 (large
  63. GRB051109B: XRT refined analysis
  64. GRB 051109B : Lulin Optical Observations
  65. GRB 051109A : Lulin BVRI Optical afterglow observation
  66. GRB051109A: further steepening in the X-ray light curve
  67. GRB051109A: XRT refined analysis
  68. GRB051105B: REM Optical observation
  69. GRB 051109B: Swift detection of a burst
  70. GRB 051109: Rc and Ic observations
  71. GRB 051109: Swift-BAT refined analysis
  72. GRB051105B: Swift/XRT upper limit
  73. GRB 051103, optical observations
  74. GRB051103: MASTER: OT limit and host galaxy candidates
  75. GRB051028: Swift-XRT refined analysis
  76. GRB 051105a: MDM Observations
  77. GRB 051105A: TNG optical observations
  78. GRB 051105A, radio observations
  79. GRB051103:_MASTER_optical_observations
  80. IPN triangulation and Konus spectrum of the bright short/hard GRB051103
  81. GRB 051105A, optical observations
  82. XRT observations of GRB 051105A
  83. GRB 051105b: ART optical limits
  84. GRB 051105B (INTEGRAL 2701): Optical observation
  85. Recent GRB UBVRcIc field photometry
  86. GRB051028: optical observations
  87. GRB051028:MASTER observations
  88. GRB 051028 (=H3951): A GRB localized by HETE
  89. SGR 1806-20: continued moderate activity seen with INTEGRAL
  90. GRB 051022: XRT Refined Spectral and Temporal Analysis
  91. GRB051012: Swift-XRT analysis
  92. GRB051021B: Swift XRT refined analysis
  93. GRB 051022, mm counterpart
  94. GRB051022: Radio Counterpart
  95. GRB051021A: Swift XRT refined analysis
  96. GRB051022: Optical Observations
  97. GRB051021b: Magellan IR Imaging
  98. GRB 051021, SMARTS optical/IR observations
  99. GRB 051021B: Refined analysis of the Swift-BAT burst
  100. GRB051021 (=H3947): Refined Analysis

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