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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"

32707 results found.

  1. GRB 071010B: Gemini Spectroscopic Observations
  2. GRB 071011: Early Super-LOTIS Observations
  3. GRB 071011: NAYUTA Optical Observation
  4. GRB 071010A: Continued Keck Imaging
  5. GRB 071010B: Bright OT confirmed with TLS
  6. Optical Observation: GRB 071010
  7. Optical observations: GRB 071010A
  8. Konus-Wind observation of GRB 071010B
  9. GRB071010B: Swift/XRT detection
  10. GRB 071010B, Swift-BAT refined analysis
  11. GRB 071010A: bright NIR afterglow
  12. GRB 071006, Swift-BAT refined analysis
  13. GRB071008: optical observations
  14. GRB 071010B possible optical transient
  15. GRB 071010A: Keck/LRIS Photometry
  16. GRB 071010: Swift-XRT observation
  17. GRB 071008, Swift-BAT refined analysis
  18. GRB 071010, Swift-BAT refined analysis
  19. Konus-Wind observation of GRB 071006
  20. GRB071008: Swift-XRT observation
  21. GRB 071010 REM NIR observations
  22. GRB 071010: Keck/LRIS Spectroscopy
  23. GRB 071010: Rapid PROMPT Detections
  24. GRB 071010: Keck Observations of the Afterglow
  25. GRB071008: IAC80 observation
  26. GRB 071003: XRT refined analysis
  27. GRB070920A: MAGIC telescope GeV observation
  28. Radio detection of GRB 071003 with the VLA
  29. GRB 070810B: further XRT analysis
  30. GRB 071003: VLT spectroscopy
  31. GRB 071003: Keck spectroscopy
  32. Konus-Wind observation of GRB 071003
  33. GRB071003: Faulkes Telescope North observations
  34. GRB 071003: Possible rebrightening
  35. GRB 071003 : Lulin R-band observations
  36. GRB 071003: Swift XRT position
  37. GRB 071003: OA power-law decay indices from KAIT
  38. GRB 071003: Keck HIRES spectroscopy
  39. GRB 071003, Swift-BAT refined analysis
  40. GRB 071003: MARGE Observations
  41. GRB 071003 Optical observations
  42. GRB 071003: P60 Confirmation of Optical Afterglow
  43. GRB 071003: KAIT optical afterglow observations
  44. GRB 070714B: host galaxy spectroscopic redshift
  45. GRB 071001: Swift-XRT Team refined analysis
  46. GRB 071001, Swift-BAT refined analysis
  47. Faulkes Telescope South observations of GRB 071001
  48. VLA observation of GRB 070923
  49. Disregard the Swift-XRT Notices today
  50. GRB 070911, SMARTS optical/IR afterglow observations
  51. GRB070925: Swift-XRT Afterglow confirmation
  52. GRB 070925: Gemini South Imaging
  53. GRB070925: Swift-XRT Position
  54. Update on Swift Status
  55. GRB 070920B: ROTSE-III Early Optical Limits
  56. Recent SGR1806-20 Activity
  57. GRB 070923, Swift-BAT refined analysis
  58. GRB 070920B: XRT observations
  59. GRB 070923: Galaxies within BAT localization
  60. GRB 070917: Suzaku/WAM observation of the prompt emission
  61. INTEGRAL ToO observations of SGR1806-20
  62. GRB 070920b, SMARTS optical observation
  63. GRB 070917: Confirmation of the X-ray afterglow
  64. GRB 070920b: LCO optical observations
  65. GRB 070920B, Swift-BAT refined analysis
  66. GRB 070911: Swift/BAT and Suzaku/WAM joint spectral analysis
  67. GRB 070920, Swift-BAT refined analysis
  68. SGR1806-20: Swift-BAT detection of enhanced activity
  69. GRB070917: Confirmation of optical afterglow
  70. GRB920925C: search for host galaxy
  71. GRB070917: optical observations
  72. GRB 070917: P60 Observations
  73. Konus-Wind observation of GRB 070917
  74. Swift Status and XRT Calibration Uncertainties
  75. GRB 070917: Swift-XRT observations
  76. GRB 070917: KAIT optical limits
  77. GRB 070917: MITSuME Akeno Ic upper limit
  78. GRB 070917: R band observations
  79. GRB 070917, Swift-BAT refined analysis
  80. GRB 070911: Suzaku WAM observation of the prompt emission
  81. GRB 070913: Swift-XRT detection of the possible X-ray afterglow
  82. GRB 070809: The Swift evidence for the SHB nature of this burst
  83. GRB 070913: Swift-BAT refined analysis
  84. GRB 070913: Corrected BAT position
  85. GRB 070913: SMARTS optical/IR observations
  86. GRB 070911: PAIRITEL IR Observations
  87. GRB 070911: Swift XRT refined analysis
  88. GRB 070911, Swift-BAT refined analysis
  89. IPN search for a GRB associated with TAROT transient on August 31
  90. Intense burst from SGR 1806-20 detected on September 7
  91. GRB 070809: Confirmation of optical transient
  92. Observations of possible TAROT GRB transient near IC 4779
  93. GRB 070810b: Image Subtraction of Multiple Keck Observations
  94. Las Campanas observations of possible TAROT GRB transient near IC
  95. Konus-Wind observation of GRB 070824
  96. Konus-Wind observation of very bright GRB 070821
  97. GRB 070731: Swift/UVOT Upper Limit
  98. GRB 070805: UVOT afterglow candidate retraction
  99. GRB070810b: optical candidate
  100. GRB 070810A: ROTSE-III Refined Analysis

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