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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').
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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"

42888 results found.

  1. GRB 080319B: Swift-XRT Team Refined Analysis
  2. GRB 080319D: Swift/UVOT Refined Analysis of the Fading Optical Afterglow Candidate
  3. GRB 080319C: AGILE-MCAL observation of the prompt emission
  4. GRB 080319B: Hobby-Eberly Telescope Spectroscopy
  5. GRB 080319D: MASTER-VWF-Kislovodsk optical observation
  6. GRB 080319C: MASTER-VWF-Kislovodsk optical observation
  7. GRB 080319D: Swift detection of a burst with a possible optical afterglow
  8. GRB 080319B: TORTORA synchronous observation
  9. VLT/UVES redshift of GRB 080319B from FeII fine-structure lines
  10. GRB 080319A/B/C: INTEGRAL SPI-ACS light curves available
  11. GRB 080319B: Enhanced Swift-XRT position
  12. GRB 080319A: Enhanced Swift-XRT position
  13. GRB 080319A, Swift-BAT refined analysis
  14. GRB 080319B: REM early data
  15. VLT/UVES redshift of GRB 080319B
  16. GRB 080319C: Early Super-LOTIS Observations
  17. GRB 080319C: Swift detection of a burst with an optical afterglow
  18. GRB 080319C: KAIT OA candidate
  19. GRB 080319A: REM observations
  20. GRB 080319B: Change in power law decay index
  21. GRB 080319B: Gemini-South Spectroscopy
  22. GRB 080319A: optical observations at the NOT
  23. GRB 080319b: Early IR Imaging from PAIRITEL
  24. GRB080319B Liverpool Telescope optical afterglow candidate
  25. GRB 080319B: Super-LOTIS Detection of a Bright OT
  26. GRB 080319B: REM observations
  27. GRB 080319B: KAIT OA
  28. GRB080319A: P60 Optical Afterglow Observations
  29. GRB 080319B: Swift detection of an intense burst with a bright optical counterpart
  30. GRB 080319A: Swift detection of a burst
  31. Swift Trigger 306745 is not a GRB
  32. Swift Trigger 306616 is not a GRB
  33. GRB080310, LBT and MDM photometry
  34. GRB080315: Bok Optical Observations
  35. Swift/UVOT observations of GRB 080315
  36. Swift trigger 306323: Swift-BAT/XRT refined analysis
  37. SAX J1818.6-1703: Swift detection (trigger 306379)
  38. GRB 080315: Optical observations
  39. GRB 080315: TAROT Calern observatory optical observations
  40. GRB 080315: Swift detection of a possible burst
  41. GRB080310, unusual slow decay in the optical
  42. GRB080310 : Optical observations by LOAO and Lulin
  43. GRB 080310: ROTSE-III Observations of Optical Counterpart
  44. GRB080310: Optical observation by MITSuME telescope
  45. GRB080310, optical observations with the LBT
  46. GRB 080229A: GAO 150cm telescope Optical Observation
  47. GRB 080310: PAIRITEL detection and PAIRITEL+KAIT+UVOT SED
  48. GRB 080307: NIR upper limit
  49. GRB 080229: NIR upper limit
  50. GRB 080310: early RAPTOR multicolor observations
  51. GRB 080310, Swift-BAT refined analysis
  52. GRB080210: optical observations
  53. GRB080307: optical upper limit
  54. GRB 080310: Swift-XRT refined analysis
  55. GRB 080310: Swift/UVOT Refined Analysis
  56. GRB 080310: Redshift from Keck/DEIMOS Spectra
  57. GRB 080310 - SDSS Pre-Burst Observations
  58. GRB 080310: Enhanced Swift-XRT position
  59. GRB 080310: RRM optical photometry with the VLT
  60. GRB080310, detection of break in optical
  61. GRB 080310: VLT/UVES spectroscopy
  62. GRB080310, optical observations with LBT
  63. GRB 080310: Lick/Kast Spectroscopy
  64. GRB080310: Super-LOTIS suggestion of brightening
  65. GRB 080310, SMARTS optical/IR afterglow observations
  66. GRB 080310: REM observations
  67. GRB 080310: Magellan redshift
  68. GRB 080310 afterglow candidate (correction to UT time)
  69. GRB 080310: Swift detection of a burst with optical afterglow
  70. GRB 080310 afterglow candidate
  71. GRB080307 BOAO optical afterglow observation - detection of a possible OT
  72. GRB 080307: Swift-XRT Team refined analysis
  73. GRB 080307: Swift/UVOT Upper Limits
  74. GRB 080307, Swift-BAT refined analysis
  75. GRB080307 - SDSS Pre-Burst Observations
  76. GRB 080307: TNT optical observation
  77. GRB 080307: Gemini-N i-band observations - candidate afterglow
  78. GRB 080307: BOAO imaging - retraction and new limit
  79. GRB 080307: retraction of UVOT candidate
  80. GRB 080307: Enhanced Swift-XRT position
  81. GRB 080307, Preliminary Swift-BAT refined analysis
  82. GRB 080307: Swift detection of a burst
  83. VLA possible radio detection of GRB 080229
  84. GRB 080303: Swift/UVOT follow-up of afterglow detection
  85. GRB 080303, Swift-BAT refined analysis
  86. GRB 080303: Rapid PROMPT Detections
  87. GRB080303: Swift XRT refined analysis
  88. GRB 080303: Enhanced Swift-XRT position
  89. Swift UVOT observations of GRB080229B
  90. GRB080229B: Swift XRT afterglow observation
  91. GRB 080303A: Faulkes Telescope South optical afterglow observations
  92. GRB 080303
  93. GRB 080303: Swift detection of a burst with optical afterglow
  94. GRB 080303: REM NIR afterglow candidate
  95. GRB 080229: I-band observations from OSN
  96. GRB080229: Swift XRT refined analysis
  97. GRB 080229: Deep Gemini/GMOS optical observations
  98. GRB 080229: Enhanced Swift-XRT position
  99. GRB 080229: REM NIR observations
  100. GRB080229: Possible optical afterglow

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