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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"

19663 results found.

  1. Swift Trigger 819301: possible GRB 180329A
  2. GRB 180325A: Swift/UVOT Detection
  3. Konus-Wind observation of GRB 180316A
  4. Konus-Wind observation of GRB 180324A
  5. Konus-Wind observation of GRB 180325A
  6. GRB 180325A, Swift-BAT refined analysis
  7. GRB 180325A: GROND observations
  8. GRB 180325A: Global MASTER-Net OT prompt observations
  9. GRB 180325A: TAROT Calern observatory optical observations
  10. GRB 180325A: D50 early optical follow-up
  11. GRB 180325A: Swift-XRT refined Analysis
  12. GRB 180325A: Enhanced Swift-XRT position
  13. GRB 180325A: RATIR Optical Observations
  14. GRB 180325A: prompt LT observations
  15. GRB 180324A, Swift-BAT refined analysis
  16. GRB 180325A: Swift detection of a burst with an optical counterpart
  17. GRB 180324A: Swift/UVOT Upper Limits
  18. GRB 180324A: Swift-XRT refined Analysis
  19. GRB 180324A: Enhanced Swift-XRT position
  20. GRB 180324A: RATIR Optical Observations and Possible Afterglow Detection
  21. GRB 180324A: KAIT Optical Upper Limit
  22. GRB 180324A: Prompt enhanced Swift-XRT position
  23. GRB 180324A: Swift detection of a burst
  24. IPN Triangulation of GRB 180318A (long)
  25. IPN Triangulation of GRB 180317A (short/hard)
  26. GRB 180316A: RATIR Optical Observations
  27. GRB 180314A: AstroSat CZTI detection
  28. Konus-Wind observation of GRB 180314A
  29. GRB 180316A: Swift-BAT refined analysis
  30. GRB 180316A: Swift-XRT refined Analysis
  31. GRB 180316A: Swift/UVOT Detection
  32. GRB 180316A: RATIR Optical Observations
  33. GRB 180316A: Enhanced Swift-XRT position
  34. GRB 180316A: LCO Cerro Tololo observations
  35. GROND observations of GRB 180316A
  36. GRB180316A: MASTER-IAC optical detection
  37. GRB 180316A: Prompt enhanced Swift-XRT position
  38. GRB 180316A: Swift detection of a burst
  39. GRB 180314B: RATIR Optical Observations
  40. GRB 180314B: Swift-BAT refined analysis
  41. GRB 180314B: Zeiss-1000/CrAO optical upper limit
  42. GRB 180314B: Swift/UVOT Upper Limits
  43. GRB 180314B: Swift-XRT refined Analysis
  44. GRB 180314B: Enhanced Swift-XRT position
  45. GRB 180314B: Prompt enhanced Swift-XRT position
  46. GRB 180314B: Swift detection of a burst
  47. GRB 180314A: Swift-BAT refined analysis
  48. Swift Trigger on MAXI J1820+070
  49. GRB 180314A: TAROT La Silla observatory optical observations
  50. GRB 180314A: LCO Siding Springs observations
  51. GRB 180314A: Swift-XRT refined Analysis
  52. GRB 180314A: Fermi GBM observation
  53. GRB 180314A: Swift/UVOT Detection
  54. GRB 180314A: MASTER-Net OT dtetction
  55. GRB 180314A: Enhanced Swift-XRT position
  56. GRB180314A: GROND detection of the afterglow
  57. GRB 180314A: Swift detection of a burst with an optical counterpart
  58. Trigger 814090: Swift detection of MAXI J1820+070
  59. GRB 180305A: AstroSat CZTI detection
  60. GRB 180311A: Swift/UVOT Upper Limits
  61. GRB 180311A, Swift-BAT refined analysis
  62. GRB 180311A: Swift-XRT refined Analysis
  63. MAXI J1820+070: Swift/UVOT counterpart correction
  64. Swift detection of MAXI J1820+070
  65. GRB 180311A: Enhanced Swift-XRT position
  66. GRB 180311A: Prompt enhanced Swift-XRT position
  67. GRB 180311A: Swift detection of a burst
  68. Trigger 813449: Swift detection of large burst from XTE J1701-407
  69. GRB 180305A: Swift/UVOT Upper Limits
  70. GRB 180305A: Mondy optical observations
  71. GRB 180305A: Swift-XRT afterglow detection
  72. GRB 180305A: RATIR Optical Afterglow Candidate
  73. GRB 180305A: Swift ToO observations
  74. GRB 180305A: Fermi-LAT detection
  75. GRB 180224A: Swift/UVOT Detection
  76. IPN Triangulation of GRB 180223A (long)
  77. GRB 180210A: Insight-HXMT/HE observation
  78. Swift Trigger 811686 is probably not an astrophysical source.
  79. GRB 180224A: Swift-BAT refined analysis
  80. GRB 180224A: RATIR Optical Observations
  81. GRB 180224A: Swift-XRT refined Analysis
  82. GRB180224A: Global MASTER-Net bright OT detection
  83. GRB 180224A: Enhanced Swift-XRT position
  84. GRB 180224A: Swift detection of a burst with an optical counterpart
  85. GRB 180222A: Swift/UVOT Upper Limits
  86. GRB 180222A: Swift-XRT refined Analysis
  87. GRB 180222A: Swift-BAT refined analysis
  88. GRB 180222A: Enhanced Swift-XRT position
  89. GRB 180222A: A long GRB detected by INTEGRAL
  90. GRB 180222A: Swift detection of a burst
  91. Swift trigger 811074 (possible GRB 180221A): Swift refined analysis
  92. Swift Trigger 811167: Detection of MAXI J1813-095
  93. GRB180221A: MASTER-OAFA optical observations
  94. Swift Trigger 811074: possible GRB 180221A
  95. IPN Triangulation of GRB 180218A (long/bright)
  96. Swift J1658.2-4242: Swift BAT and XRT refined analysis
  97. Swift trigger 810300: MASTER-OAFA robotic report
  98. Swift J1658.2-4242 (trigger 810300): Swift-XRT position
  99. Swift Trigger 810300 is a probable new Galactic source: Swift J1658.2-4242
  100. GRB 180210A: Swift-XRT afterglow detection

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