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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"

19697 results found.

  1. GRB 140419A: RATIR Optical and NIR Observations
  2. GRB 140419A: ROTSE-III Detection of Optical Counterpart
  3. GRB 140419A: Swift detection of a burst with optical afterglow
  4. Konus-Wind observation of GRB 140416A
  5. GRB 140414A: Swift/UVOT Upper Limit
  6. GRB 140414A: Swift-XRT observations
  7. GRB 140414A: TNG optical observations
  8. GRB 140413A: Swift/UVOT Observations of the Optical Afterglow
  9. GRB 140412A: Swift/UVOT Upper Limits
  10. GRB 140413A: Swift-XRT refined Analysis
  11. GRB 140413A: TAROT La Silla observatory optical observations
  12. GRB 140413A: Swift-XRT observations
  13. GRB 140412A: Enhanced Swift-XRT position
  14. GRB 140413A: GROND afterglow candidate
  15. GRB 140412A: Swift detection of a burst
  16. GRB 140408A: 1.5m OSN optical upper limit
  17. Swift Trigger 595345 is not an astrophysical source
  18. Swift-BAT trigger 595162 is noise
  19. GRB 140408A: MITSuME Akeno Optical observation
  20. GRB 140408A: RATIR Optical Upper Limits
  21. GRB 140408A: GROND Detection of an Afterglow Candidate
  22. GRB 140408A: Swift/UVOT Upper Limits
  23. GRB 140408A: Swift-XRT refined Analysis
  24. GRB 140408A: MITSuME Okayama upper limits
  25. GRB 140408A: Enhanced Swift-XRT position
  26. GRB 140408A: Fermi GBM detection
  27. GRB 140408A: Swift detection of a burst
  28. GRB 140402A: Deep limit on the optical afterglow from Magellan observations
  29. GRB 140331A: Continued RATIR Optical and NIR Observations
  30. GRB 140402A BAT refined analysis
  31. GRB 140402A: Marginal BAT detection
  32. Swift trigger 594286: Is likely a noise trigger
  33. GRB 140301A: Zadko observatory - Gingin optical observations
  34. GRB 140331A: Swift/UVOT Upper Limits
  35. GRB 140302A: TAROT La Silla observatory optical observations
  36. GRB 140323A: Zadko observatory - Gingin optical observations
  37. GRB 140331A: Zadko observatory - Gingin optical observations
  38. GRB 140129B: AAO optical upper limit
  39. GRB 140129A: Mondy optical observations
  40. GRB 140331A: MITSuME Okayama upper limits
  41. GRB 140331A: Enhanced Swift-XRT position
  42. GRB 140331A: RATIR Optical and NIR Observations
  43. GRB 140331A: Swift detection of a burst
  44. GRB 140329A: Fermi-LAT detection
  45. GRB 140329A: Fermi GBM observation of a bright burst
  46. GRB 140226A/iPTF14yb: Mondy optical observations
  47. GRB 140320C: Mondy optical observations and afterglow confirmation
  48. GRB 140323A: Swift/UVOT Upper Limits
  49. GRB 140323A: Enhanced Swift-XRT position
  50. GRB 140323A: Swift detection of a burst
  51. GRB 140320A: RATIR Optical and NIR Observations
  52. IPN Triangulation of very intense GRB 140320D
  53. GRB 140320C: Mini-GWAC prompt observation
  54. GRB 140320C: Swift/UVOT Upper Limits
  55. GRB 140320A: Swift-BAT refined analysis
  56. GRB 140320B: Swift/UVOT Upper Limits
  57. GRB 140320A: Swift/UVOT Upper Limits
  58. GRB 140320C: Swift-XRT observations
  59. GRB 140320C: Swift-XRT detection of the X-ray afterglow
  60. GRB 140320B: Swift-XRT detection of the afterglow
  61. GRB 140320C: Mondy optical observations
  62. GRB 140320A: Enhanced Swift-XRT position
  63. GRB 140320B: ISON-NM optical observations
  64. Swift Trigger 592558 is not an astrophysical source
  65. GRB 140318A: Continued RATIR Optical and NIR Observations
  66. GRB 140318A: Mondy optical limit
  67. GRB 140318A: Swift/UVOT Upper Limits
  68. GRB 140311B: Mondy optical limit
  69. GRB 140311A: Mondy optical limits
  70. GRB 140318A: Enhanced Swift-XRT position
  71. GRB 140318A: RATIR Optical and NIR Detections
  72. GRB140318A: Discovery Channel Telescope Optical Detection
  73. GRB 140318A: NOT detection of the afterglow
  74. GRB 140318A: Swift detection of a burst
  75. GRB 140311C: MASTER optical observations
  76. GRB 140311C: Swift-XRT and UVOT observations
  77. GRB 140311C: MASTER before, during and after trigger optical observations
  78. GRB 140311A: RATIR Optical and NIR Detection
  79. GRB 140311A: Montarrenti Observatory optical upper limit
  80. GRB 140311B: Fermi GBM Detection
  81. GRB 140311A: Swift/UVOT Upper Limits
  82. GRB 140311B: Swift/UVOT Upper Limits
  83. GRB 140311B: RATIR Optical and NIR Observations
  84. GRB 140311A: Bassano Bresciano Observatory optical upper limit
  85. GRB 140311A: Swift-XRT refined Analysis
  86. GRO J1744-28: Fermi GBM observation
  87. GRB 140311A: Gemini-North redshift
  88. GRB 140302A: GROND confirmation of the afterglow
  89. GRB 140311B: final MASTER OT light curve
  90. GRB 140311A: Enhanced Swift-XRT position
  91. GRB 140311B: Enhanced Swift-XRT position
  92. GRB 140311B: TAROT Calern observatory optical observations
  93. GRB 140311A: NOT observations of the optical afterglow
  94. GRB 140311A: Zadko observatory - Gingin optical observations
  95. GRB 140311B: Swift-XRT observations
  96. GRB 140311B: Nanshan afterglow detection
  97. IPN Triangulation of GRB 140308A
  98. Konus-Wind observation of GRB 140306A
  99. IPN Triangulation of GRB 140306A
  100. GRB 140304A: Continued RATIR Optical and NIR Observations

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