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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.

Advanced Search Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

19611 results found.

  1. GRB 160216A: Swift-BAT refined analysis
  2. Konus-Wind observation of GRB 160216A (and GRB 160216B)
  3. GRB 160216A: Swift-XRT refined Analysis
  4. GRB 160216A: Swift/UVOT Upper Limits
  5. GRB 160216A: Enhanced Swift-XRT position
  6. GRB 160216A: Swift detection of a burst
  7. GRB 160131A: second epoch observations with the GMRT
  8. Low frequency GMRT observations of GRB 160131A
  9. GRB 160206A: Kiso/KWFC optical observations
  10. GRB 160203A: RATIR Upper Limits
  11. GRB 160131A: TSHAO optical observations
  12. Swift Trigger 672897 is probably not an astrophysical event
  13. GRB 151215A: TAROT Calern observatory very early optical detection
  14. GRB 160206A: Swift/UVOT observations
  15. GRB 160203A: Zadko observatory - Gingin optical detection
  16. GRB 160203A: Swift-BAT refined analysis
  17. GRB 160206A: GROND Observations
  18. GRB 160206A: Swift-XRT observations
  19. GRB 160206A: Tiled Swift observations
  20. GRB 160131A: TSHAO optical observations
  21. GRB 160131A: Mondy optcial observations
  22. GRB 160203A: TSHAO optical observations
  23. GRB 160203A: RATIR Optical Observations
  24. GRB 160131A: RATIR Optical Observations
  25. GRB 160203A: Skynet PROMPT-CTIO observations of the optical afterglow
  26. GRB 160203A: Swift-XRT refined Analysis
  27. GRB 160203A: Swift/UVOT Detection
  28. GRB 160203A: Enhanced Swift-XRT position
  29. The bright GRB160203A: X-shooter spectroscopy and redshift
  30. GRB 160203A: GROND Afterglow Candidate
  31. GRB 160203A: Swift detection of a burst
  32. GRB 160131A: VLA detection
  33. Konus-Wind observation of GRB 160131A
  34. GRB 160131A: AbAO optical observations
  35. GRB 160131A: Mondy optical observations
  36. GRB 160131A Swift/UVOT Detection
  37. GRB 160131A: GROND Detection of the Optical/NIR Afterglow
  38. GRB 160131A: Swift-XRT refined Analysis
  39. GRB 160131A: Khureltogot optical observations
  40. GRB 160131A: Swift-BAT refined analysis
  41. GRB 160131A: Enhanced Swift-XRT position
  42. GRB 160131A: LCOGT-FTN optical afterglow observations
  43. GRB160131.35 MASTER-Net OT detection
  44. GRB 160131A: Swift detection of a burst with an optical counterpart
  45. GRB 160127A: Khureltogot optical observations
  46. GRB 160127A: VLA Detection
  47. GRB 160127A: Swift/UVOT Detection
  48. GRB 160127A: Swift-BAT refined analysis
  49. GRB 160127A: Swift-XRT refined Analysis
  50. GRB 160123A: TAROT La Silla observatory optical observations
  51. GRB 160127A: Enhanced Swift-XRT position
  52. GRB 160127A: TAROT La Silla observatory optical light curve
  53. GRB 160127A: Swift detection of a burst with an optical counterpart
  54. GRB 160123A: GROND Upper limits
  55. GRB 160121A: TSHAO optical observation
  56. GRB 160123A: Swift/UVOT Upper Limits
  57. GRB 160123A: Swift-XRT refined Analysis
  58. GRB 160123A: Swift-BAT refined analysis
  59. GRB 160123A: Enhanced Swift-XRT position
  60. GRB 160123A: Swift detection of a burst
  61. GRB 160121A: RATIR Optical Observations
  62. GRB 160121A: Swift-XRT refined Analysis
  63. GRB 160121A: Swift/UVOT Upper Limits
  64. GRB 160121A: GROND Afterglow observations
  65. GRB 160121A: TSHAO optical afterglow confirmation
  66. GRB 160121A: Swift-BAT refined analysis
  67. GRB 160121A: Enhanced Swift-XRT position
  68. GRB 160121A: 1.8m MOA optical afterglow detection
  69. GRB 160121A: MASTER-Amur observations
  70. GRB 160121A: Swift detection of a burst
  71. Konus-Wind observation of GRB 160119A
  72. GRB 160117A: Swift-XRT afterglow detection
  73. GRB 160119A: VLA Detection
  74. GRB 160117B: VLA Detection
  75. GRB160119A: BOOTES-2/TELMA Early Upper Limits
  76. GRB 160119A: Swift/UVOT Upper Limits
  77. GRB 160119A: GROND optical/NIR afterglow observations
  78. GRB 160117B: RATIR Optical and NIR Observations
  79. GRB 160119A: Swift-BAT refined analysis
  80. GRB 160119A: Swift-XRT refined Analysis
  81. GRB 160119A: Enhanced Swift-XRT position
  82. GRB 160119A: Swift detection of a burst
  83. GRB 160117A: Swift/UVOT Upper Limits
  84. GRB 151228B: AbAO optical upper limit
  85. GRB 160117A: Swift-XRT observations
  86. GRB 160117B: Swift-XRT refined Analysis
  87. GRB 160117A: Swift-BAT refined analysis
  88. GRB 160117B: Swift/UVOT Detection
  89. GRB 160117B: Enhanced Swift-XRT position
  90. GRB 160117B: LCOGT-SSO optical observations
  91. GRB 160117B: Swift detection of a burst with optical counterpart
  92. GRB 160117A: Swift detection of a burst
  93. IPN Triangulation of GRB 160113A
  94. LIGO/Virgo G211117: Further Swift-XRT sources
  95. IPN Triangulation of GRB 160111A (short/hard)
  96. GRB 160113A: Swift-XRT observations
  97. GRB 160113A: Swift ToO observations
  98. GRB 160113A: iPTF P48 Observations and Optical Transient Candidates
  99. GRB 160104A: Swift/UVOT Detection
  100. IPN Triangulation of GRB 151231A

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