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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"

28114 results found.

  1. GRB 060923A: Gemini Second Epoch and Afterglow Confirmation
  2. GRB 060923C: VLT J-band observations
  3. GRB060923B: Swift/UVOT upper limits
  4. GRB 060923B: Swift XRT Refined Analysis
  5. GRB 060923C: Swift XRT refined analysis
  6. GRB 060923A: Swift XRT refined analysis
  7. GRB 060923C: Keck Observations
  8. GRB 060923A: Keck and Gemini Observations
  9. GRB060923C : Faulkes Telescope South optical limits
  10. GRB 060923C: optical observation
  11. GRB 060923C: Swift detection of a burst
  12. GRB 060923B: Swift detection of a burst
  13. GRB 060923: Early Super-LOTIS Observations
  14. GRB 060923: UKIRT nIR observations - candidate afterglow
  15. GRB 060923: Swift detection of a burst
  16. Swift detection of IGR J17497-2821 (trigger 230504)
  17. Swift detects a hard X-ray burst from AXP CXOU J164710.2-455216
  18. GRB060919: Swift/UVOT optical observations
  19. GRB 060919 : Faulkes South Telescope Observations
  20. GRB060919: XRT refined analysis
  21. GRB 060919: Swift detection of a burst
  22. GRB 060912A: VLA Observation
  23. GRB 060912A: Probable Host Galaxy
  24. GRB060825: MAGIC telescope GeV observation
  25. GRB 060912: Redshift of nearby 2MASS galaxy
  26. GRB060912: optical observations
  27. GRB060912: OPTIMA-Burst optical observations
  28. GRB 060912: Swift XRT Team Refined Analysis
  29. GRB 060912: Swift detection of a burst with an optical afterglow
  30. GRB060906: Danish/DFOSC optical observations
  31. VLA observations of GRB 060908
  32. GRB 060908, Swift/XRT refined analysis
  33. GRB 060908: Swift/UVOT Observations
  34. GRB 060904B : CFHT/WIRCam NIR afterglow observations
  35. GRB 060904B: Kiso Optical observation
  36. GRB 060904A : Optical limit
  37. GRB 060908: PROMPT Detection of a Bright Counterpart
  38. GRB 060908: Swift detection of a burst with a bright optical counterpart
  39. GRB 060906: optical observation
  40. GRB 060906: Early RAPTOR optical limits
  41. GRB 060906: Swift/XRT Refined Analysis
  42. GRB 060906: Swift-UVOT observations
  43. VLT redshift of GRB 060906
  44. GRB 060906: FRAM observations - flash determination (airplane)
  45. GRB 060906: KAIT observations
  46. GRB 060906: Confirmation of P60 Optical Afterglow
  47. GRB 060906: observations with FRAM
  48. GRB 060906 (?): P60 Optical Afterglow Candidate
  49. GRB 060906: Swift detection of a probable burst
  50. GRB 060904b: SMARTS optical/IR afterglow observations
  51. GRB060904A: Swift/UVOT optical observations
  52. GRB 060904A: Subaru NIR observation
  53. GRB060904b: Optical observations with Swift/UVOT
  54. GRB 060904B: Swift-XRT refined analysis
  55. GRB 060904A: Swift-XRT refined analysis
  56. GRB 060904A: P60 Observations
  57. GRB060904B: Watcher observations
  58. GRB 060904: TAROT optical observations
  59. GRB 060904B: Swift detection of a burst with optical counterpart
  60. GRB 060904B: ROTSE-III Detection of Optical Counterpart
  61. GRB 060904: Swift detection of a bright burst
  62. GRB060901: Optical observations
  63. 060901: Swift UVOT followup observations
  64. GRB 060901: SMARTS optical/IR observations update
  65. GRB 060901: Swift/XRT Refined Analysis
  66. GRB 060901: SMARTS optical/IR observations
  67. GRB 060901: Swift/XRT Position
  68. GRB 060901: Watcher observations
  69. GRB 060604: VLA Observation
  70. GRB 060605: VLA Observation
  71. GRB 060707: VLA observation
  72. GRB 060825: VLA observations
  73. GRB 060826(?): Swift detection of a possible burst
  74. GRB 060825: XRT Team Refined Analysis
  75. GRB 060825: TNG optical observations
  76. GRB 060825: P60 Observations
  77. GRB060825: BOOTES-IR optical observations
  78. GRB 060825: Swift detection of a burst
  79. GRB060729: analysis of XMM-Newton observation
  80. Radio observations of GRB 060719
  81. GRB 060729, SMARTS optical/IR observations
  82. GRB060814: Break in the XRT light curve
  83. GRB060813: Break in the XRT light curve
  84. GRB 060814: Confirmation of IR afterglow
  85. GRB 060814: P60 Observations
  86. GRB 060814: P200 NIR Observations
  87. GRB 060814: source inside revised XRT error box
  88. GRB 060814: Possible IR counterpart
  89. GRB060805B: optical observations
  90. GRB060814: Swift/UVOT upper limits
  91. GRB 060814: Swift XRT refined analysis
  92. GRB 060814: VLT optical limits
  93. GRB 060814: Swift detection of a bright burst
  94. GRB060813: Swift/UVOT upper limits
  95. GRB 060813: Swift XRT refined analysis
  96. GRB 060813: Swift detection of a burst
  97. GRB051109B: Late-time Radio Observations
  98. Image of the dust-scattering halo around SGR 1806-20
  99. Second VLA limit on new radio point source in SGR 1806-20
  100. A dust-scattering halo detected around SGR 1806-20

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