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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"

19666 results found.

  1. GRB 181003A: Swift-BAT refined analysis
  2. GRB 181003A: Swift-XRT afterglow detection
  3. GRB 180925A: Astrosat CZTI detection
  4. GRB 181003A: Swift/UVOT Upper Limits
  5. GRB 181002A: Swift-XRT refined Analysis
  6. GRB 181003A: LCO Cerro Tololo observations
  7. GRB 181003A: MASTER optical observation
  8. GRB181002A: GOTO optical limits
  9. GRB 181002A: Swift/UVOT Upper Limits
  10. GRB 181003A: Swift-XRT observations
  11. GRB 181003A: Swift detection of a burst
  12. GRB 181002A: Swift-BAT refined analysis
  13. GRB 181002A: MASTER optical observation
  14. GRB 181002A: Enhanced Swift-XRT position
  15. Konus-Wind observation of GRB 180925A
  16. GRB 181002A: Swift detection of a burst
  17. Trigger 864882: Swift detection of Crab in its normal state
  18. GRB 180930A: Swift-BAT refined analysis
  19. GRB 180930A: Swift-XRT refined Analysis
  20. GRB 180930A: Swift/UVOT Upper Limits
  21. GRB 180930A: Enhanced Swift-XRT position
  22. GRB 180930A: KAIT Optical Upper Limit
  23. GRB 180930A: Prompt enhanced Swift-XRT position
  24. GRB 180930A: Swift detection of a burst
  25. GRB 180924A: Swift/UVOT Upper Limits
  26. GRB 180925A: Insight-HXMT/HE detection
  27. GRB 180925A: Swift/UVOT Detection
  28. GRB 180925A: Swift-BAT refined analysis
  29. GRB 180925A: Swift-XRT refined Analysis
  30. GRB 180925A: Enhanced Swift-XRT position
  31. GRB 180925A: Prompt enhanced Swift-XRT position
  32. GRB 180925A: Swift detection of a burst
  33. GRB 180924A: MASTER inspection
  34. GRB 180924A: Swift-XRT refined Analysis
  35. GRB 180924A: Swift-BAT refined analysis
  36. GRB 180924A: Enhanced Swift-XRT position
  37. GRB 180924A: Swift detection of a burst
  38. Swift Trigger 863053 is not an astrophysical event
  39. GRB180914B: Swift UVOT position correction to circ. 23241
  40. GRB 180914B: AstroSat CZTI detection
  41. GRB 180914A: AstroSat CZTI detection
  42. GRB 180914B: AGILE/MCAL refined analysis
  43. GRB180914B: Swift UVOT detection of an optical afterglow
  44. GRB 180914B: RATIR Optical and NIR Observations
  45. GRB 180914B: KAIT Optical Afterglow Candidate
  46. GRB 180914B: Swift-XRT afterglow detection
  47. GRB 180914A: RATIR Optical and NIR Observations
  48. GRB 180914B: Tiled Swift observations
  49. GRB 180914B: Fermi-LAT detection
  50. GRB 180914A: Swift-XRT observations
  51. GRB 180914A: Tiled Swift observations
  52. GRB 180914A: Fermi-LAT detection
  53. GRB 180905A: Swift/UVOT Upper Limits
  54. GRB 180905A, Swift-BAT refined analysis
  55. GRB 180905A: RATIR Optical and NIR Observations
  56. GRB 180905A: Swift-XRT refined Analysis
  57. GRB 180904A: BOOTES-2/TELMA early observations
  58. GRB 180905A: BOOTES-3/YA optical observations
  59. GRB 180905A: Enhanced Swift-XRT position
  60. GRB 180904A: AbAO optical upper limit
  61. GRB 180904A: Swift/UVOT Upper Limits
  62. GRB 180904A: Swift-BAT refined analysis
  63. GRB 180905A: Swift detection of a burst
  64. GRB 180904A: Swift-XRT refined Analysis
  65. GRB 180904A: LT early observations
  66. GRB 180904A: SAO RAS optical observations
  67. GRB 180904A: OSN observations
  68. GRB 180904A: Enhanced Swift-XRT position
  69. GRB 180904A: Swift detection of a burst
  70. Konus-Wind observation of GRB 180828A
  71. GRB 180829A: Swift-XRT observations
  72. GRB 180828A: AstroSat CZTI detection
  73. GRB 180828A: Swift/UVOT Upper Limits
  74. GRB 180828A: RATIR Optical and NIR Observations
  75. GRB 180828A: Swift-BAT refined analysis
  76. GRB 180829A: Tiled Swift observations
  77. GRB 180828A: Swift-XRT refined Analysis
  78. GRB 180828A / Swift J1754.9-2548: Enhanced Swift-XRT position
  79. GRB 180828A: Fermi GBM observation
  80. GRB 180828A: Swift detection of a GRB or possible Galactic Transient Swift J1754.9-2548
  81. GRB 180818B: TSHAO optical upper limit
  82. GRB 180823A, Swift-BAT refined analysis
  83. IPN Triangulation of GRB 180824A (short)
  84. GRB 180823A: Swift/UVOT Upper Limits
  85. GRB 180823A: RATIR Optical and NIR Observations
  86. GRB 180823A: Swift-XRT refined Analysis
  87. GRB 180823A: Enhanced Swift-XRT position
  88. GRB 180823A: Swift detection of a burst
  89. GRB 180821A: VLT observations
  90. GRB 180821A: Swift/UVOT Upper Limits
  91. GRB 180821A: Swift-BAT refined analysis
  92. GRB 180821A: iTelescope counterpart is not the afterglow
  93. GRB 180821A: Swift-XRT refined Analysis
  94. GRB 180821A: LCO Siding Springs observations
  95. GRB 180821A: Enhanced Swift-XRT position
  96. GRB 180818B: 1.5m OSN optical afterglow candidate
  97. GRB 180821A: iTelescope optical afterglow detection
  98. GRB 180821A: BOOTES-3/YA optical observations
  99. GRB 180821A: Swift detection of a burst
  100. GRB180806A: confirmation of the X-ray afterglow

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