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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.

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

39368 results found.

  1. GRB 051227: P60 Observations
  2. GRB 051227: MDM Observation
  3. GRB 051227: R-band object in the XRT error circle
  4. GRB 051227: Joint Swift-HETE Spectral Analysis
  5. GRB 051227: XRT refined analysis
  6. GRB 051227: Further analysis of the Swift-BAT burst
  7. GRB 051227: Refined analysis of the Swift-BAT burst
  8. GRB051227: SDSS pre-burst observations
  9. GRB 051227, optical observation
  10. GRB 051227: Swift detection of a burst
  11. IBAS_alert n. 2719 : not a real GRB
  12. Konus-Wind observation of GRB 051221A
  13. GRB051221A: Suzaku WAM observation of the prompt emission
  14. GRB 051221A: MDM Optical Observations
  15. GRB051016: analysis of the XMM-Newton observation
  16. GRB 051221A: Detection at 251nm with Swift UVOT
  17. GRB 051221A: Chandra Afterglow Position
  18. GRB 051221A: Refined spectral and temporal analysis of the Swift-BAT short hard burst
  19. GRB 051221B: ROTSE-III Optical Limits
  20. GRB 051221B: TAROT optical limits
  21. GRB 051221A: WSRT Radio Observations
  22. GRB 051221: Redshift from Gemini
  23. GRB 051221: Continued fading of optical afterglow
  24. GRB 051221B: Refined analysis of the Swift-BAT burst
  25. Possible GRB 051221B: MDM Optical Detection
  26. GRB 051221A: RAPTOR Fading Counterpart Constraint
  27. GRB 051221B: BOOTES optical observations.
  28. Possible GRB 051221B: Swift XRT position
  29. GRB 051211A: Evidence This Is a Short Burst from Analysis of Spectral
  30. Swift-BAT detection of a possible burst
  31. GRB 051221: Discovery of fading optical afterglow
  32. GRB 051221: Swift XRT refined analysis
  33. GRB 051221: Swift/UVOT upper limits
  34. GRB 051221: Possible nearby cluster
  35. GRB 051221: No variability in Gemini data
  36. GRB 051221: Correction to GCN #4368
  37. GRB 051221: Gemini observations
  38. GRB 051221: Improved astrometry of the IR counterpart
  39. GRB051221: K-band source
  40. GRB 051221: XRT position
  41. GRB 051221: Refined analysis of the Swift-BAT short hard burst
  42. GRB 051221: IR Observations at GRB+1hr
  43. GRB 051221: Swift detection of a bright short burst
  44. Swift-BAT discovery of hard x-ray transient SWIFT J1626.6-5156
  45. Refined analysis of the Swift-BAT detection of the RS CVn star II Peg
  46. GRB 051211B: optical afterglow
  47. Swift detection of an RS CVn flare star
  48. GRB051211A: possible optical candidate
  49. Swift Trigger 172767 is not a GRB
  50. GRB 051215: near-infrared observations
  51. GRB051215 - SDSS pre-burst observations
  52. GRB 051215: Swift detection of a possible burst
  53. GRB 051215: A short GRB in a cluster?
  54. GRB051211B: Probable radio afterglow
  55. GRB051105: optical observations
  56. GRB 051213: Swift-BAT refined analysis
  57. GRB 051211B, optical observation
  58. GRB 051213: Swift-BAT detection of a burst
  59. GRB 051211a: RTT150 optical observations
  60. GRB051211B, RBO optical observations
  61. GRB 051211A: Swift/UVOT upper limits
  62. GRB 051211B: Swift/UVOT upper limits - correction
  63. GRB 051211B: Swift/UVOT upper limits
  64. GRB 051211A,optical observation
  65. GRB 051211B: Swift XRT confirmation of the afterglow
  66. GRB051211B: Liverpool Telescope observation
  67. GRB 051211b: RTT150 optical observations
  68. GRB 051211A and GRB051211B: BOOTES simultaneous observations
  69. GRB 051211B: Swift XRT Observations
  70. GRB 051210: Swift/UVOT upper limits
  71. GRB 051210: Magellan Imaging
  72. GRB 051211: TAROT optical limits
  73. GRB 051211B: a possible optical detection by TAROT
  74. GRB 051211B: a long GRB detected by INTEGRAL
  75. GRB 051211: Swift XRT upper limit
  76. GRB 051211:IAC80 optical observations
  77. HETE SXC localization of GRB 051211 (=H3979)
  78. GRB 051210: Optical imaging from Las Campanas
  79. GRB 051210: SALT detection limit
  80. GRB 051210: BAT further refined analysis of the short burst
  81. GRB 051210: Swift XRT refined analysis
  82. GRB 051210: FRAM early limit
  83. GRB 051210: Swift-BAT refined analysis of a short burst
  84. GRB 051210: A short GRB in a cluster?
  85. GRB 051210: Swift detection of a burst
  86. IPN observations of SGR1806-20
  87. An extraordinary long burst on December 3 from SGR1806-20
  88. IBAS Alert 2706 : not a real GRB
  89. GRB051117B: optical observation
  90. GRB051111: optical observaion
  91. Swift-BAT trigger 165579 is not a GRB
  92. GRB 051127: Swift-BAT detection of a possible burst
  93. GRB051117b: No Swift/UVOT Detection
  94. GRB 051117A: Swift/UVOT Detection of an Afterglow: Correction
  95. GRB 051117A: Swift/UVOT Detection of an Afterglow
  96. GRB051111: Suzaku WAM observation of the prompt emission
  97. GRB051008: Suzaku WAM observation of the prompt emission
  98. GRB 051109B: GAO 150cm telescope Optical limit
  99. GRB 051109A : GAO 150cm telescope Rc-band detection
  100. GRB 051021 Optical Observations

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