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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"

12189 results found.

  1. GRB 160425A: Swift-BAT refined analysis
  2. GRB 160425A: GROND observation
  3. GRB 160425A: Swift-XRT refined Analysis
  4. GRB 160425A: Swift detection of an unusual burst with an optical afterglow
  5. Konus-Wind observation of GRB 160424A
  6. GRB 160424A: Swift-XRT observations
  7. GRB 160422A: Swift-XRT afterglow detection
  8. GRB 160422A: Fermi-LAT Detection
  9. GRB 160419A, Swift-BAT refined analysis
  10. GRB 160419A: Swift detection of a burst
  11. GRB 160417A: Swift-BAT refined analysis
  12. GRB 160417A: Swift-XRT refined Analysis
  13. GRB 160417A: KAIT optical afterglow confirmation
  14. GRB 160417A: Swift detection of a burst with an optical counterpart
  15. Konus-Wind observation of GRB 160409A
  16. Swift Trigger 682614 is not a GRB
  17. GRB 160412A: Swift-XRT refined Analysis
  18. Konus-Wind observation of GRB 160410A (short/hard)
  19. GRB 160410A: Swift-XRT refined Analysis
  20. GRB 160411A: Swift-XRT observations
  21. GRB 160408A: Swift-XRT refined Analysis
  22. GRB 160408A: Swift detection of a short burst
  23. GRB 160401A: LT observations
  24. GRB 160401A: MASTER-IAC prompt optical observations
  25. GRB 160401A: a long GRB detected by INTEGRAL
  26. Konus-Wind observation of GRB 160325A
  27. GRB 160327A: KAIT optical afterglow confirmation
  28. GRB 160327A: Swift-XRT refined Analysis
  29. GRB 160327A: Swift detection of a burst
  30. GRB 160325A: Fermi-LAT detection
  31. LIGO/Virgo G211117: CALET GBM Observations
  32. LIGO/Virgo G211117: EWE for NOWT follow-up of northern sky
  33. SGR 0755-2933, Swift-BAT refined analysis
  34. Swift detection of a likely new SGR: SGR 0755-2933
  35. GRB 160314B: Fermi-LAT detection
  36. GRB 160314A: Swift-XRT refined Analysis
  37. GRB 160314A: Swift detection of a burst
  38. Fermi GBM trigger 479509107/160312874 is not a GRB
  39. GRB 160313A: Swift-XRT refined Analysis
  40. GRB 160310A: Further NOT observations
  41. Konus-Wind observation of GRB 160310A (possible ultra-long GRB?)
  42. GRB 160310A: NOT optical observations
  43. GRB 160310A: Fermi-LAT detection
  44. Swift Trigger 678197 is a noise fluctuation
  45. Swift trigger 677890 is noise
  46. GRB 160303A iTelescope observation
  47. GRB 160303A: Swift-XRT refined Analysis
  48. GRB 160303A: MITSuME Akeno optical upper limits
  49. GRB 160303A: Swift detection of a burst, possibly short
  50. GRB 160228A: MASTER-Amur prompt observations
  51. GRB 160228A: Swift-XRT refined Analysis
  52. GRB 160227A: MASTER prompt OT Detection and LC
  53. GRB 160227A: AROMA-N Optical Observation
  54. GRB 160227A: NOT redshift
  55. GRB 160228A: Swift detection of a burst
  56. GRB 160227A, Swift-BAT refined analysis
  57. GRB 160227A: Swift-XRT refined Analysis
  58. GRB 160227A: MAXI/GSC detection
  59. GRB 160225A: MASTER-Amur observations
  60. GRB 160225A: Swift-XRT refined Analysis
  61. GRB 160225A: MASTER-Amur early observations
  62. GRB 160225A: Swift detection of a burst
  63. Konus-Wind observation of GRB 160219A
  64. GRB 160223A: Swift-BAT refined analysis
  65. GRB 160223B: Khureltogot optical observations
  66. GRB 160223B: A long GRB detected by INTEGRAL
  67. GRB 160221A: A long GRB detected by INTEGRAL
  68. Konus-Wind observation of GRB 160220B
  69. GRB 160220B: GROND Observations
  70. GRB 160220A: Swift-BAT refined analysis
  71. IPN Triangulation of GRB 160219A (short/hard)
  72. Swift Trigger 674752 is likely a noise fluctuation in the direction of IGR17488-3253
  73. GRB 160220A: TAROT Calern and TAROT La Silla observatory optical observations
  74. GRB 160220A: MASTER-Amur observations
  75. GRB 160220A: GROND Optical/NIR Upper Limits
  76. GRB 160220A: Fermi GBM observation
  77. GRB 160216A: Swift-BAT refined analysis
  78. Konus-Wind observation of GRB 160216A (and GRB 160216B)
  79. GRB 160216A: Swift-XRT refined Analysis
  80. GRB 160216A: Swift detection of a burst
  81. LIGO/Virgo G184098: MAXI/GSC search for an X-ray counterpart of GW150914
  82. GRB 160131A: second epoch observations with the GMRT
  83. GRB 160203A: Swift-BAT refined analysis
  84. GRB 160206A: MAXI/GSC detection
  85. GRB 160203A: TSHAO optical observations
  86. GRB 160203A: Skynet PROMPT-CTIO observations of the optical afterglow
  87. GRB 160203A: Swift-XRT refined Analysis
  88. GRB 160203A: Swift detection of a burst
  89. Konus-Wind observation of GRB 160131A
  90. GRB 160131A: TNG spectroscopic observations and redshift
  91. GRB 160131A: Khureltogot optical observations
  92. GRB 160131A: Swift detection of a burst with an optical counterpart
  93. GRB 160127A: Swift-XRT refined Analysis
  94. GRB 160127A: Swift detection of a burst with an optical counterpart
  95. LIGO Virgo G211117: MWA Observations
  96. GRB 160118A CALET Gamma-Ray Burst Monitor detection
  97. GRB 160123A: Swift detection of a burst
  98. LIGO/VIRGO G184098: Summary of VLA results for iPTF15cyk
  99. Konus-Wind observation of GRB 160119A
  100. GRB 160117A: Swift-XRT afterglow detection

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