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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').
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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"

16161 results found.

  1. GRB 080319D: optical upper limit
  2. GRB 080319C: UVOT Observations
  3. GRB 080319B: UVOT Observations
  4. GRB 080319A: UVOT Observations
  5. GRB 080319B - CARMA mm Observations
  6. GRB 080320: optical limit
  7. GRB 080320: Gemini-N optical afterglow
  8. GRB 080319B: Gemini-South photometry
  9. GRB 080319B optical observations
  10. GRB 080319B: WSRT Radio Observations
  11. GRB 080320: SDSS source and Gemini-N observations
  12. GRB 080320: optical limit from IAC80
  13. GRB 080319C: Early RAPTOR Observations
  14. GRB 080319C: KAIT OA observations
  15. GRB 080320: ROTSE-III Optical Limits
  16. GRB 080319B : Lulin observation of temporal break at 0.2 days
  17. GRB 080319B: ROTSE-III Observations of Optical Counterpart
  18. GRB 080319B: optical observations
  19. GRB 080319B: RAPTOR observations of a naked eye burst
  20. GRB 080319A: Swift-XRT Team Refined Analysis
  21. GRB 080319D: Swift/UVOT Refined Analysis of the Fading Optical Afterglow Candidate
  22. GRB 080319B: Hobby-Eberly Telescope Spectroscopy
  23. GRB 080319D: MASTER-VWF-Kislovodsk optical observation
  24. GRB 080319C: MASTER-VWF-Kislovodsk optical observation
  25. GRB 080319D: Swift detection of a burst with a possible optical afterglow
  26. GRB 080319B: TORTORA synchronous observation
  27. GRB 080319B: REM early data
  28. VLT/UVES redshift of GRB 080319B
  29. GRB 080319C: Swift detection of a burst with an optical afterglow
  30. GRB 080319A: REM observations
  31. GRB 080319b prompt optical observation by Pi-of-the-Sky
  32. GRB 080319B: Gemini-South Spectroscopy
  33. GRB 080319A: optical observations at the NOT
  34. GRB0 080319B : LOAO optical observation
  35. GRB080319B Liverpool Telescope optical afterglow candidate
  36. GRB080319A: P60 Optical Afterglow Observations
  37. GRB 080319B: Swift detection of an intense burst with a bright optical counterpart
  38. GRB080315: Bok Optical Observations
  39. GRB 080315: Optical observations
  40. GRB 080315: TAROT Calern observatory optical observations
  41. GRB080310 : Lulin Optical observations
  42. GRB080310, unusual slow decay in the optical
  43. GRB 080310: GAO 150cm telescope Optical Observation
  44. GRB080310 : Optical observations by LOAO and Lulin
  45. GRB 080310: ROTSE-III Observations of Optical Counterpart
  46. GRB080310: Optical observation by MITSuME telescope
  47. GRB080310, optical observations with the LBT
  48. GRB 080307: GAO 150cm telescope Optical Observation
  49. GRB 080229A: GAO 150cm telescope Optical Observation
  50. GRB080210: optical observations
  51. GRB080307: optical upper limit
  52. GRB 080310: Swift/UVOT Refined Analysis
  53. GRB080310 : Lulin optical observation
  54. GRB 080310: RRM optical photometry with the VLT
  55. GRB080310, detection of break in optical
  56. GRB 080310: VLT/UVES spectroscopy
  57. GRB080310, optical observations with LBT
  58. GRB 080310, SMARTS optical/IR afterglow observations
  59. GRB 080310: Magellan redshift
  60. GRB 080310: Swift detection of a burst with optical afterglow
  61. GRB080229, optical upper limit (Correction)
  62. GRB080307, optical upper limit
  63. GRB080307 BOAO optical afterglow observation - detection of a possible OT
  64. GRB080229, optical upper limit
  65. GRB 080307: Early RAPTOR Limits
  66. GRB 080307: TNT optical observation
  67. GRB080307: Optical upper limits
  68. GRB 080307: retraction of UVOT candidate
  69. GRB 080307, Preliminary Swift-BAT refined analysis
  70. GRB 080307 : BOAO optical afterglow observation
  71. GRB 080307: Optical observation with DMC/KANATA
  72. Swift UVOT observations of GRB080229B
  73. GRB 080303A: Faulkes Telescope South optical afterglow observations
  74. GRB 080303: Swift detection of a burst with optical afterglow
  75. GRB 080303A: ROTSE-III Optical Limits
  76. GRB 080229: Deep Gemini/GMOS optical observations
  77. GRB080229: Possible optical afterglow
  78. GRB 080229: Faulkes Telescope South optical limit
  79. GRB 080229A: ROTSE-III Optical Limits
  80. Early optical shallow decay in GRB 071112C
  81. GRB080207: optical observations
  82. GRB080205: optical observations
  83. GRB080211: optical observations
  84. GRB 071010B : Early optical brightening detected by TAOS
  85. ESO optical and NIR observations of GRB 080218B
  86. GRB 080218b, SMARTS optical/IR limits
  87. GRB 080212: VLT optical rapid decay
  88. GRB 080212: REM refined analysis
  89. VLA radio upper limit on GRB 080212
  90. GRB080212: Optical afterglow candidate observed by MITSuME Telescope
  91. GRB 080212: Gemini-South optical observations
  92. GRB 080212: optical observations
  93. GRB 080210: Swift/UVOT Refined Analysis
  94. GRB 080207: optical observations.
  95. GRB 080210: Hobby-Eberly Telescope Absorption Spectroscopy
  96. GRB 080210: VLT redshift
  97. GRB 080210: GOND detection in all bands and redshift upper limit
  98. GRB 080210: Swift detection of a burst with optical afterglow
  99. GRB 080210: TAROT La Silla observatory optical detection
  100. GRB 080205: GAO 150cm telescope Optical limit

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