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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"

28263 results found.

  1. GRB 160225A: NOT optical observations
  2. GRB 160225A: WHT LIRIS observations
  3. GRB 160225A: MITSuME Okayama Optical Observation
  4. GRB 160223A: RATIR Optical and NIR Observations
  5. GRB 160225A: TSHAO optical upper limit
  6. GRB 160225A: Enhanced Swift-XRT position
  7. GRB 160225A: Swift detection of a burst
  8. GRB 160223A: Swift-XRT afterglow detection
  9. GRB 160221A: Swift-XRT afterglow detection
  10. GRB 160223A: AbAO optical observations
  11. Konus-Wind observation of GRB 160219A
  12. GRB 160223A: Swift-BAT refined analysis
  13. GRB 160223B: Khureltogot optical observations
  14. GRB 160223A: Fermi GBM observation
  15. GRB 160223B: Swift-XRT observations
  16. GRB 160223B: LCOGT-FTN optical observations
  17. GRB 160223B: A long GRB detected by INTEGRAL
  18. GRB 160223A: GROND optical/NIR afterglow
  19. GRB 160221A: Fermi GBM observation
  20. LVC GW 150914: TAROT/TZAC Final analysis correction
  21. GRB 160221A: GROND upper limits
  22. GRB 160220B: Further GROND Observations
  23. Further Swift/UVOT observations of GRB 160220B
  24. GRB 160221A: Swift-XRT observations
  25. LVC GW 150914: TAROT/TZAC Final analysis
  26. GRB 160221A: A long GRB detected by INTEGRAL
  27. GRB 160220B: Swift-BAT refined analysis
  28. GRB 160220B: GROND Observations
  29. GRB 160219A: Fermi GBM detection
  30. GRB 160220A: nIR observations at AAT
  31. GRB 160220A: Swift-XRT refined Analysis
  32. GRB 160220A: Swift-BAT refined analysis
  33. GRB160220B: Swift/UVOT observations
  34. GRB 160220B: Swift-XRT refined Analysis
  35. IPN Triangulation of GRB 160219A (short/hard)
  36. LIGO/Virgo GW150914
  37. GRB160220B: Enhanced Swift-XRT position
  38. GRB160220A: Swift/UVOT observations
  39. GRB 160220A: TAROT Calern and TAROT La Silla observatory optical observations
  40. GRB 160220A: GROND Optical/NIR Upper Limits
  41. GRB 160220A: Fermi GBM observation
  42. GRB 160220A: Enhanced Swift-XRT position
  43. GRB 160220A: Swift-XRT observations
  44. GRB 160216A: Swift-BAT refined analysis
  45. GRB 160216A: Swift-XRT refined Analysis
  46. LIGO/Virgo G184098: Correction for GCN Circular 18361
  47. GRB 160216A: Swift/UVOT Upper Limits
  48. GRB 160216A: Enhanced Swift-XRT position
  49. GRB 160216A: Swift detection of a burst
  50. GRB 160206A: Kiso/KWFC optical observations
  51. GRB 160203A: RATIR Upper Limits
  52. GRB 160206B: Fermi GBM detection
  53. LIGO/Virgo G211117: LOFAR follow-up
  54. GRB 160131A: TSHAO optical observations
  55. Swift Trigger 672897 is probably not an astrophysical event
  56. GRB 151215A: TAROT Calern observatory very early optical detection
  57. GRB 160206A: Swift/UVOT observations
  58. GRB 160203A: Zadko observatory - Gingin optical detection
  59. GRB 160203A: Swift-BAT refined analysis
  60. GRB 160206A: GROND Observations
  61. GRB 160206A: Swift-XRT observations
  62. GRB 160206B: iPTF P48 Observations and Optical Transient Candidates
  63. GRB 160206A: MAXI/GSC detection
  64. GRB 160131A: TSHAO optical observations
  65. GRB 160203A: TSHAO optical observations
  66. GRB 160203A: RATIR Optical Observations
  67. GRB 160131A: RATIR Optical Observations
  68. GRB 160203A: Skynet PROMPT-CTIO observations of the optical afterglow
  69. GRB 160203A: Swift-XRT refined Analysis
  70. GRB 160203A: Swift/UVOT Detection
  71. GRB 160203A: Enhanced Swift-XRT position
  72. GRB 160203A: LCOGT-Cerro Tololo optical afterglow confirmation
  73. GRB 160203A: GROND Afterglow Candidate
  74. GRB 160203A: Swift detection of a burst
  75. GRB160131A: NOEMA detection of the millimetre afterglow
  76. GRB 160131A: AbAO optical observations
  77. GRB 160131A: Mondy optical observations
  78. GRB 160131A Swift/UVOT Detection
  79. GRB 160131A: MITSuME Ishigakijima Optical Observation
  80. GRB 160131A: GROND Detection of the Optical/NIR Afterglow
  81. GRB 160131A: Bassano Bresciano Observatory optical observations
  82. GRB 160131A: Swift-XRT refined Analysis
  83. GRB 160131A: Khureltogot optical observations
  84. GRB 160131A: TNG optical observations
  85. GRB 160131A: Swift-BAT refined analysis
  86. GRB 160131A: Enhanced Swift-XRT position
  87. GRB 160131A: LCOGT-SSO optical observations
  88. GRB 160131A: RATIR Optical Observations
  89. GRB 160131A: LCOGT-FTN optical afterglow observations
  90. GRB160131.35 MASTER-Net OT detection
  91. GRB 160131A: Swift detection of a burst with an optical counterpart
  92. GRB 160127A: RATIR Optical Observations
  93. GRB 160127A: Khureltogot optical observations
  94. GRB 160127A: LCOGT-Sutherland optical upper limit
  95. GRB 160127A: Swift/UVOT Detection
  96. GRB 160127A: Swift-BAT refined analysis
  97. GRB 160127A: Swift-XRT refined Analysis
  98. GRB 160123A: TAROT La Silla observatory optical observations
  99. GRB 160127A: RATIR Optical Observations
  100. GRB 160127A: Enhanced Swift-XRT position

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