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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"

21985 results found.

  1. GRB 080603A: Swift-XRT detection of the afterglow
  2. GRB 080430: optical observations
  3. GRB 080603B: Swift/UVOT detection of the afterglow
  4. GRB 080603A: Swift/UVOT detection of the afterglow
  5. GRB080603B: RTT150 optical observations, break in light curves
  6. GRB 080604: Early Super-LOTIS Observations
  7. GRB 080516: TAROT La Silla observatory optical observations
  8. GRB 080603B: BOOTES2/TELMA optical observations
  9. GRB 080603B: TAROT Calern observatory detection of a plateau in the light curve
  10. GRB080603: Super-LOTIS detection of Optical Counterpart
  11. GRB 080603: Gemini-North redshift
  12. SGR 1627-41: Chandra/RXTE/Swift Observations Scheduled
  13. GRB 080602: Swift-XRT refined analysis
  14. GRB 080602: NOT R-band upper limit
  15. GRB 080523: afterglow confirmation and redshift constraints
  16. GRB 080524: Swift XRT and UVOT analysis
  17. GRB 080503: 2nd Epoch Chandra X-ray Observations
  18. GRB 080520: VLT host detection
  19. GRB 080523: VLT optical observations
  20. Swift/UVOT observations of GRB 080523
  21. GRB080521(?): detection of possible burst from BAT slew data and XRT ToO
  22. GRB 80516: Swift/UVOT Observations
  23. GRB 080514B: pseudo-z= 1.8 from prompt emission spectrum
  24. GRB 080514B: UVOT Observations
  25. GRB080520: Swift/UVOT observations
  26. GRB 080520: VLT redshift
  27. GRB 080520, GROND observations
  28. GRB 080503: Further HST imaging
  29. GRB 080514B: Further NIR observations
  30. GRB080517: Liverpool Telescope Optical Observations
  31. GRB 080517: Swift detection of a burst
  32. GRB 080516, GROND 2nd epoch observations
  33. GRB 080516, GROND observations
  34. GRB080430: optical observations
  35. GRB 080516, SMARTS optical/IR observations
  36. GRB 080514B: NOT observations
  37. GRB 080514B : redshift estimation
  38. GRB 080514B: KPNO 4m IR observations
  39. GRB 080514B, GROND observations
  40. GRB 080514B: Afterglow candidate
  41. GRB 080514B: Watcher observations
  42. GRB 080514B: possible AGILE detection at E>50 MeV
  43. GRB 080514B: SuperAGILE/IPN GRB Localization
  44. GRB080514: REM NIR & Optical Observations
  45. GRB 080319B: Further HST observations and underlying host
  46. GRB 080507: Keck photometry
  47. GRB 080503: Chandra Observation of X-ray Rebrightening or Flattening
  48. GRB 080503: Hubble Space Telescope Imaging
  49. GRB080507: Swift/UVOT followup observations
  50. GRB 080506:Optical observations from HCT
  51. GRB 080507: GRB localization by SuperAGILE
  52. GRB 080503: Fading in continued Gemini imaging
  53. GRB080506: Swift/UVOT observations
  54. GRB 080506: Observations from NOT
  55. GRB 080506: Optical observation with KANATA/TRISPEC
  56. GRB 080503: VLA radio upper limit
  57. GRB 080503: Observations from NOT
  58. GRB 080430: TLS imaging one day after the GRB
  59. GRB 080503: No further optical rebrightening
  60. GRB 080503: Late-time Optical rebrightening (possible mini-SN)
  61. GRB080503: Swift/UVOT Upper Limits
  62. GRB 080430
  63. GRB 080430
  64. GRB 080430
  65. GRB 080503: Optical afterglow candidate and LRIS spectroscopy of the short burst
  66. GRB 080411: Continued Swift Monitoring
  67. GRB 080430: Optical observations
  68. GRB 080430: Shallow decay
  69. GRB080430: RTT150 Optical Observations
  70. GRB080430: Swift/UVOT observations
  71. GRB 080430 - multicolor observations of the afterglow
  72. GRB 080430 optical observations
  73. GRB080430: optical observations
  74. GRB 080430: Hobby-Eberly Telescope Absorption Redshift
  75. GRB 080430: Spectroscopy from CAHA
  76. GRB 080430 - SDSS Pre-Burst Observations
  77. GRB 080430: TAROT Calern observatory optical observations
  78. GRB960202B - on the association with SN 1996cr
  79. GRB080426: Observations from CAHA
  80. GRB080426: Swift/UVOT upper limits
  81. Possible GRB 080315: XRT non-detection of afterglow
  82. GRB 080320 : Faulkes Telescope North Observations
  83. GRB 080319A : Liverpool and Faulkes Telescopes Observations
  84. GRB 080420A: ROTSE-III Optical Limits on a possible short burst
  85. GRB 080413B: Rapid PROMPT Observations
  86. Swift XRT and UVOT observations of GRB080414
  87. GRB 080319B: Jet Break, Energetics, Supernova
  88. GRB 080413B: Faulkes Telescope South optical afterglow observations
  89. GRB 080413A: Liverpool Telescope and Faulkes Telescope South optical observations
  90. GRB 080413A: MOA-II optical afterglow observations
  91. GRB 080319B: Continued Gemini-N monitoring
  92. GRB 080414: RTT150 optical observations
  93. GRB 080414 Watcher observations
  94. VLA radio observations of GRB 080413B
  95. GRB 080413A: Gemini-South Spectroscopy
  96. GRB 080413B: Gemini-South Spectroscopy
  97. VLA radio observations of GRB 080413A
  98. GRB080413B
  99. GRB 080413a, SMARTS optical/IR afterglow observations
  100. GRB080413A: Swift/UVOT observations

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