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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"

19662 results found.

  1. GRB 180325A: Swift/UVOT Detection
  2. Konus-Wind observation of GRB 180316A
  3. Konus-Wind observation of GRB 180324A
  4. Konus-Wind observation of GRB 180325A
  5. GRB 180325A, Swift-BAT refined analysis
  6. GRB 180325A: GROND observations
  7. GRB 180325A: Global MASTER-Net OT prompt observations
  8. GRB 180325A: TAROT Calern observatory optical observations
  9. GRB 180325A: D50 early optical follow-up
  10. GRB 180325A: Swift-XRT refined Analysis
  11. GRB 180325A: Enhanced Swift-XRT position
  12. GRB 180325A: RATIR Optical Observations
  13. GRB 180325A: prompt LT observations
  14. GRB 180324A, Swift-BAT refined analysis
  15. GRB 180325A: Swift detection of a burst with an optical counterpart
  16. GRB 180324A: Swift/UVOT Upper Limits
  17. GRB 180324A: Swift-XRT refined Analysis
  18. GRB 180324A: Enhanced Swift-XRT position
  19. GRB 180324A: RATIR Optical Observations and Possible Afterglow Detection
  20. GRB 180324A: KAIT Optical Upper Limit
  21. GRB 180324A: Prompt enhanced Swift-XRT position
  22. GRB 180324A: Swift detection of a burst
  23. IPN Triangulation of GRB 180318A (long)
  24. IPN Triangulation of GRB 180317A (short/hard)
  25. GRB 180316A: RATIR Optical Observations
  26. GRB 180314A: AstroSat CZTI detection
  27. Konus-Wind observation of GRB 180314A
  28. GRB 180316A: Swift-BAT refined analysis
  29. GRB 180316A: Swift-XRT refined Analysis
  30. GRB 180316A: Swift/UVOT Detection
  31. GRB 180316A: RATIR Optical Observations
  32. GRB 180316A: Enhanced Swift-XRT position
  33. GRB 180316A: LCO Cerro Tololo observations
  34. GROND observations of GRB 180316A
  35. GRB180316A: MASTER-IAC optical detection
  36. GRB 180316A: Prompt enhanced Swift-XRT position
  37. GRB 180316A: Swift detection of a burst
  38. GRB 180314B: RATIR Optical Observations
  39. GRB 180314B: Swift-BAT refined analysis
  40. GRB 180314B: Zeiss-1000/CrAO optical upper limit
  41. GRB 180314B: Swift/UVOT Upper Limits
  42. GRB 180314B: Swift-XRT refined Analysis
  43. GRB 180314B: Enhanced Swift-XRT position
  44. GRB 180314B: Prompt enhanced Swift-XRT position
  45. GRB 180314B: Swift detection of a burst
  46. GRB 180314A: Swift-BAT refined analysis
  47. Swift Trigger on MAXI J1820+070
  48. GRB 180314A: TAROT La Silla observatory optical observations
  49. GRB 180314A: LCO Siding Springs observations
  50. GRB 180314A: Swift-XRT refined Analysis
  51. GRB 180314A: Fermi GBM observation
  52. GRB 180314A: Swift/UVOT Detection
  53. GRB 180314A: MASTER-Net OT dtetction
  54. GRB 180314A: Enhanced Swift-XRT position
  55. GRB180314A: GROND detection of the afterglow
  56. GRB 180314A: Swift detection of a burst with an optical counterpart
  57. Trigger 814090: Swift detection of MAXI J1820+070
  58. GRB 180305A: AstroSat CZTI detection
  59. GRB 180311A: Swift/UVOT Upper Limits
  60. GRB 180311A, Swift-BAT refined analysis
  61. GRB 180311A: Swift-XRT refined Analysis
  62. MAXI J1820+070: Swift/UVOT counterpart correction
  63. Swift detection of MAXI J1820+070
  64. GRB 180311A: Enhanced Swift-XRT position
  65. GRB 180311A: Prompt enhanced Swift-XRT position
  66. GRB 180311A: Swift detection of a burst
  67. Trigger 813449: Swift detection of large burst from XTE J1701-407
  68. GRB 180305A: Swift/UVOT Upper Limits
  69. GRB 180305A: Mondy optical observations
  70. GRB 180305A: Swift-XRT afterglow detection
  71. GRB 180305A: RATIR Optical Afterglow Candidate
  72. GRB 180305A: Swift ToO observations
  73. GRB 180305A: Fermi-LAT detection
  74. GRB 180224A: Swift/UVOT Detection
  75. IPN Triangulation of GRB 180223A (long)
  76. GRB 180210A: Insight-HXMT/HE observation
  77. Swift Trigger 811686 is probably not an astrophysical source.
  78. GRB 180224A: Swift-BAT refined analysis
  79. GRB 180224A: RATIR Optical Observations
  80. GRB 180224A: Swift-XRT refined Analysis
  81. GRB180224A: Global MASTER-Net bright OT detection
  82. GRB 180224A: Enhanced Swift-XRT position
  83. GRB 180224A: Swift detection of a burst with an optical counterpart
  84. GRB 180222A: Swift/UVOT Upper Limits
  85. GRB 180222A: Swift-XRT refined Analysis
  86. GRB 180222A: Swift-BAT refined analysis
  87. GRB 180222A: Enhanced Swift-XRT position
  88. GRB 180222A: A long GRB detected by INTEGRAL
  89. GRB 180222A: Swift detection of a burst
  90. Swift trigger 811074 (possible GRB 180221A): Swift refined analysis
  91. Swift Trigger 811167: Detection of MAXI J1813-095
  92. GRB180221A: MASTER-OAFA optical observations
  93. Swift Trigger 811074: possible GRB 180221A
  94. IPN Triangulation of GRB 180218A (long/bright)
  95. Swift J1658.2-4242: Swift BAT and XRT refined analysis
  96. Swift trigger 810300: MASTER-OAFA robotic report
  97. Swift J1658.2-4242 (trigger 810300): Swift-XRT position
  98. Swift Trigger 810300 is a probable new Galactic source: Swift J1658.2-4242
  99. GRB 180210A: Swift-XRT afterglow detection
  100. GRB 180210A: Tiled Swift observations

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