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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"

16159 results found.

  1. GRB 080319B: UVOT Observations
  2. GRB 080319A: UVOT Observations
  3. GRB 080319B - CARMA mm Observations
  4. GRB 080320: optical limit
  5. GRB 080320: Gemini-N optical afterglow
  6. GRB 080319B: Gemini-South photometry
  7. GRB 080319B optical observations
  8. GRB 080319B: WSRT Radio Observations
  9. GRB 080320: SDSS source and Gemini-N observations
  10. GRB 080320: optical limit from IAC80
  11. GRB 080319C: Early RAPTOR Observations
  12. GRB 080319C: KAIT OA observations
  13. GRB 080320: ROTSE-III Optical Limits
  14. GRB 080319B : Lulin observation of temporal break at 0.2 days
  15. GRB 080319B: ROTSE-III Observations of Optical Counterpart
  16. GRB 080319B: optical observations
  17. GRB 080319B: RAPTOR observations of a naked eye burst
  18. GRB 080319A: Swift-XRT Team Refined Analysis
  19. GRB 080319D: Swift/UVOT Refined Analysis of the Fading Optical Afterglow Candidate
  20. GRB 080319B: Hobby-Eberly Telescope Spectroscopy
  21. GRB 080319D: MASTER-VWF-Kislovodsk optical observation
  22. GRB 080319C: MASTER-VWF-Kislovodsk optical observation
  23. GRB 080319D: Swift detection of a burst with a possible optical afterglow
  24. GRB 080319B: TORTORA synchronous observation
  25. GRB 080319B: REM early data
  26. VLT/UVES redshift of GRB 080319B
  27. GRB 080319C: Swift detection of a burst with an optical afterglow
  28. GRB 080319A: REM observations
  29. GRB 080319b prompt optical observation by Pi-of-the-Sky
  30. GRB 080319B: Gemini-South Spectroscopy
  31. GRB 080319A: optical observations at the NOT
  32. GRB0 080319B : LOAO optical observation
  33. GRB080319B Liverpool Telescope optical afterglow candidate
  34. GRB080319A: P60 Optical Afterglow Observations
  35. GRB 080319B: Swift detection of an intense burst with a bright optical counterpart
  36. GRB080315: Bok Optical Observations
  37. GRB 080315: Optical observations
  38. GRB 080315: TAROT Calern observatory optical observations
  39. GRB080310 : Lulin Optical observations
  40. GRB080310, unusual slow decay in the optical
  41. GRB 080310: GAO 150cm telescope Optical Observation
  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 080307: GAO 150cm telescope Optical Observation
  47. GRB 080229A: GAO 150cm telescope Optical Observation
  48. GRB080210: optical observations
  49. GRB080307: optical upper limit
  50. GRB 080310: Swift/UVOT Refined Analysis
  51. GRB080310 : Lulin optical observation
  52. GRB 080310: RRM optical photometry with the VLT
  53. GRB080310, detection of break in optical
  54. GRB 080310: VLT/UVES spectroscopy
  55. GRB080310, optical observations with LBT
  56. GRB 080310, SMARTS optical/IR afterglow observations
  57. GRB 080310: Magellan redshift
  58. GRB 080310: Swift detection of a burst with optical afterglow
  59. GRB080229, optical upper limit (Correction)
  60. GRB080307, optical upper limit
  61. GRB080307 BOAO optical afterglow observation - detection of a possible OT
  62. GRB080229, optical upper limit
  63. GRB 080307: Early RAPTOR Limits
  64. GRB 080307: TNT optical observation
  65. GRB080307: Optical upper limits
  66. GRB 080307: retraction of UVOT candidate
  67. GRB 080307, Preliminary Swift-BAT refined analysis
  68. GRB 080307 : BOAO optical afterglow observation
  69. GRB 080307: Optical observation with DMC/KANATA
  70. Swift UVOT observations of GRB080229B
  71. GRB 080303A: Faulkes Telescope South optical afterglow observations
  72. GRB 080303: Swift detection of a burst with optical afterglow
  73. GRB 080303A: ROTSE-III Optical Limits
  74. GRB 080229: Deep Gemini/GMOS optical observations
  75. GRB080229: Possible optical afterglow
  76. GRB 080229: Faulkes Telescope South optical limit
  77. GRB 080229A: ROTSE-III Optical Limits
  78. Early optical shallow decay in GRB 071112C
  79. GRB080207: optical observations
  80. GRB080205: optical observations
  81. GRB080211: optical observations
  82. GRB 071010B : Early optical brightening detected by TAOS
  83. ESO optical and NIR observations of GRB 080218B
  84. GRB 080218b, SMARTS optical/IR limits
  85. GRB 080212: VLT optical rapid decay
  86. GRB 080212: REM refined analysis
  87. VLA radio upper limit on GRB 080212
  88. GRB080212: Optical afterglow candidate observed by MITSuME Telescope
  89. GRB 080212: Gemini-South optical observations
  90. GRB 080212: optical observations
  91. GRB 080210: Swift/UVOT Refined Analysis
  92. GRB 080207: optical observations.
  93. GRB 080210: Hobby-Eberly Telescope Absorption Spectroscopy
  94. GRB 080210: VLT redshift
  95. GRB 080210: GOND detection in all bands and redshift upper limit
  96. GRB 080210: Swift detection of a burst with optical afterglow
  97. GRB 080210: TAROT La Silla observatory optical detection
  98. GRB 080205: GAO 150cm telescope Optical limit
  99. GRB 080207: Optical limits from Gemini-South
  100. GRB 080205: RTT150 optical observations

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