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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').
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"

601 results found.

  1. GRB 081012: Fermi GBM detection
  2. Konus-Wind observation of GRB 081001
  3. GRB 080916C: Swift XRT refined analysis
  4. Swift-BAT/-XRT refined analysis on trigger 324362 (LS I +61 303)
  5. Swift trigger 324362 (LS I +61 303 ?): XRT
  6. Swift trigger 324362 (LS I +61 303 ?)
  7. GLAST Burst Monitor detection of GRB 080810
  8. GRB 080727B: REM prompt observations
  9. Konus-Wind observation of GRB 080605
  10. GRB 080514B: UVOT Observations
  11. Konus-Wind observation of GRB 080513
  12. Konus-Wind observation of GRB 080507
  13. VLA radio observations of GRB 080413A
  14. GRB080330: MAGIC telescope GeV observation
  15. GRB 080330, Swift-BAT refined analysis
  16. VLT/UVES redshift of GRB 080319B from FeII fine-structure lines
  17. Konus-Wind observation of GRB 080211
  18. GRB 071028: Swift-XRT Team refined analysis
  19. Konus-Wind observation of GRB 071020
  20. GRB 071020: Swift-XRT refined analysis
  21. GRB 071020: Swift detection of a bright burst
  22. GRB 071011: Confirmation of P60 optical afterglow
  23. GRB 071011: P60 Optical Afterglow Candidate
  24. GRB 071011, Swift-BAT refined analysis
  25. GRB 071011: Optical afterglow candidate
  26. Konus-Wind observation of GRB 071006
  27. GRB 071003: Keck HIRES spectroscopy
  28. GRB 070809: The Swift evidence for the SHB nature of this burst
  29. GRB 070714A: Swift/UVOT Upper limits
  30. GRB 070714: Swift detection of a bright burst, possibly short
  31. GRB 070621: Swift detection of a burst
  32. GRB 070610: Swift-UVOT Upper Limits
  33. GRB 070429B: Swift XRT refined analysis
  34. GRB 070412: Swift detection of a burst
  35. Konus-Wind and Konus-A observations of GRB 070220
  36. GRB070208 - SDSS Pre-Burst Observations
  37. GRB 070208: Early IR detection and afterglow astrometry
  38. GRB070208: Faulkes Telescope North Afterglow Identification
  39. Konus-Wind observation of GRB 061222A
  40. GRB 061201: UVOT Observations of a Fading Optical Afterglow
  41. GRB061126: Optical afterglow observations from MIRO
  42. GRB 061004: Swift/XRT Astrometry Correction
  43. GRB 060729: An update on the late-time Swift observations
  44. Konus-Wind observation of GRB 060904A
  45. Konus-Wind observation of GRB 060901
  46. GRB060729: analysis of XMM-Newton observation
  47. Swift-BAT trigger 215279 is not a GRB
  48. GRB 060526: Refined analysis of the Swift-BAT burst
  49. GRB 060522: Swift detection of a burst with possible optical afterglow
  50. GRB 060306: Swift-BAT refined analysis
  51. Konus-Wind observation of bright hard GRB 060213
  52. GRB 060211B: Swift/BAT refined analysis
  53. GRB 060210: Refined analysis of the Swift-BAT burst
  54. GRB 060202: Refined analysis of the Swift-BAT burst
  55. Konus-Wind observation of GRB 060124
  56. GRB 060117: PROMPT Observations
  57. GRB 060108: Refined XRT analysis
  58. GRB 051221B: Optical Observations with Kuiper 1.54m
  59. GRB 051221B: Refined analysis of the Swift-BAT burst
  60. Konus-Wind observation of GRB 051028
  61. Konus-Wind observation of GRB 051022
  62. GRB 050906, summary of radio observations
  63. GRB 051001: Swift Detection of a Burst
  64. GRB050922C: optical observation
  65. GRB 050827: Swift-BAT refined analysis
  66. GRB 050730: WSRT Radio Observations
  67. GRB050801: Swift-BAT detection of a burst
  68. GRB 050509b: Swift XRT Position
  69. IPN Summary of SGR1806-20 Activity in 2004
  70. IPN triangulation of GRB030413 (small error box)
  71. IPN triangulation of GRB021211B (two large error boxes)
  72. IPN triangulation of GRB020904
  73. IPN triangulation of GRB020715 (=GRB150702)
  74. IPN triangulation of GRB150702
  75. GRB020124 optical observations with RIBOTS/RIMOTS
  76. XRF/GRB 011030: Detection of the Probable Host Galaxy
  77. GRB 011030: TNG K-band observation
  78. XRF011030: J and K band observations
  79. XRF011030: Chandra Observations
  80. GRB 011030: K-band observations
  81. The X-ray Flash 011030 ('GRB 011030')
  82. GRB 011030, WSRT radio observations
  83. GRB011030 - further refinement WFC position
  84. GRB 011030, Radio observations
  85. GRB010220, Radio and Optical Observations
  86. GRB010213 (HETE) TAROT observations
  87. GRB 001109: deep JHK upper limits
  88. GRB 000301A, Radio Observations
  89. BEPPOSAX GRBM Localization of GRB991226
  90. IPN localization of GRB991226
  91. Optical Observations of GRB990627
  92. BeppoSAX NFI Observation of GRB980425
  93. GRB980425 Optical Follow-up
  94. GRB980425: X-ray revised positions
  95. GRB970519, optical follow-up at Schmidt Calern
  96. BSAX Observations of GRB980425 field
  97. GRB980425 BATSE observations
  98. GRB 980425 optical observations
  99. GRB980425: optical obs.
  100. GRB980425: Radio Observations

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