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GCN Circulars

GCN Circulars are rapid astronomical bulletins submitted by and distributed to community members worldwide. They are used to share discoveries, observations, quantitative near-term predictions, requests for follow-up observations, or future observing plans related to high-energy, multi-messenger, and variable or transient astrophysical events. 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').
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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.

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subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

28059 results found.

  1. GRB051103: Radio Observations
  2. GRB/SGR 050925: XMM-Newton ToO observation
  3. GRB051111: Swift/UVOT Observations
  4. GRB051111: XRT preliminary analysis
  5. GRB 051111: Swift-BAT refined analysis
  6. GRB 051109A Optical Observations
  7. GRB 051111A : Lulin BVRI multi band afterglow observation
  8. GRB051111a: SARA Observations
  9. GRB 051111a: IR photometry
  10. GRB 051109B. Radio Observations
  11. GRB 051109A
  12. GRB051109A - radio observations
  13. GRB 051109B: Swift-BAT refined analysis
  14. GRB 051109A: Swift-UVOT Observations
  15. IPN triangulation and Konus spectrum of the short/soft GRB051107 (large
  16. GRB051109B: no UVOT source detected
  17. GRB051109B: XRT refined analysis
  18. GRB 051109B : Lulin Optical Observations
  19. GRB 051109A : Lulin BVRI Optical afterglow observation
  20. GRB051109A: further steepening in the X-ray light curve
  21. GRB051109A: XRT refined analysis
  22. GRB 051109B: Super-LOTIS Observations
  23. GRB051105B: REM Optical observation
  24. GRB 051109B: Swift detection of a burst
  25. GRB 051109: Rc and Ic observations
  26. GRB 051109: Swift-BAT refined analysis
  27. GRB 051109a: IR Photometry and Astrometry
  28. GRB051109: Swift detection of a burst
  29. GRB 051109a: IR Detections
  30. GRB051105B: Swift/XRT upper limit
  31. GRB051105B: Swift/UVOT upper limit
  32. GRB051103: MASTER: OT limit and host galaxy candidates
  33. GRB051028: Swift-XRT refined analysis
  34. GRB 051105a, observation from Naini Tal and OSN
  35. GRB 051105a: MDM Observations
  36. GRB 051105A: TNG optical observations
  37. GRB051105A: Swift/UVOT Observations
  38. GRB 051105A, radio observations
  39. GRB051103:_MASTER_optical_observations
  40. IPN triangulation and Konus spectrum of the bright short/hard GRB051103
  41. GRB 051105A, optical observations
  42. XRT observations of GRB 051105A
  43. GRB 051105b: ART optical limits
  44. GRB 051105B (INTEGRAL 2701): Optical observation
  45. GRB 051105: Swift detection of a short burst
  46. Recent GRB UBVRcIc field photometry
  47. GRB051028 SARA Observation
  48. GRB051028: optical observations
  49. GRB051028: Swift/UVOT upper limits
  50. GRB051028: Swift XRT Position
  51. GRB051028:MASTER observations
  52. GRB051021B: Swift/UVOT Upper limits
  53. GRB 051021, Optical Observations
  54. GRB 051022: XRT Refined Spectral and Temporal Analysis
  55. GRB051012: Swift-XRT analysis
  56. GRB051021B: Swift XRT refined analysis
  57. GRB 051022, mm counterpart
  58. GRB 051022: Swift/UVOT Upper Limits
  59. GRB051022: Radio Counterpart
  60. GRB051022: IR observations
  61. GRB051021A: Swift XRT refined analysis
  62. GRB051022: Optical Observations
  63. GRB051021b: Magellan IR Imaging
  64. GRB 051021, SMARTS optical/IR observations
  65. GRB051022: Swift XRT Position
  66. GRB 051021: P200 Ks Observations
  67. GRB 051022 (=H3950): SXC Flight Localization is Valid
  68. GRB051021: Swift/UVOT Upper Limits
  69. GRB 051021B: Refined analysis of the Swift-BAT burst
  70. GRB 051022: SSO40 Optical Observations
  71. GRB051022,optical observation
  72. GRB 051021,optical observation
  73. GRB 051021B: Swift detection of a burst
  74. GRB 051021 : optical afterglow observation at Lulin
  75. GRB 051021: Optical observations and candidate afterglow
  76. GRB051021.63
  77. GRB051021.6: MASTER optical observation
  78. GRB051021: A GRB Localized by HETE
  79. Swift-BAT triggered on a posible CR Shower or possible GRB
  80. GRB 051016b: Optical limit
  81. Afterglow candidate of GRB 051016B observed at Lulin
  82. GRB 051016A: Swift/UVOT upper limits
  83. GRB 051016B: refined analysis of the Swift/XRT data
  84. GRB 051016B: Swift/UVOT detection
  85. GRB 051016B,optical observation
  86. GRB 051016B : Optical follow-up at Lulin
  87. GRB 051016B: Refined analysis of the Swift-BAT burst
  88. GRB 051016B: Swift detection of a soft burst
  89. GRB 051016: Swift-BAT refined analysis
  90. GRB051016 XMM-Newton observation
  91. GRB051016: Swift XRT refined analysis.
  92. GRB 051016: PROMPT Observations
  93. GRB051016: Swift detection of a burst
  94. Photometric calibration of Swift/UVOT and Re-analysis of Swift/UVOT GRB 050922C data
  95. GRB 051012: Swift-BAT detection of burst yesterday
  96. Swift-BAT Trigger 159578 is a possible burst
  97. GRB 051006: Swift/UVOT Upper Limits
  98. GRB051008: optical candidate
  99. GRB 051008 - a low redshift low-luminosity burst?
  100. GRB051011: bright nebulae near error box

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