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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"

6829 results found.

  1. GRB 180329B: NOT optical afterglow detection
  2. GRB 180329B: Swift-XRT refined Analysis
  3. GRB 180325A: Swift-XRT refined Analysis
  4. GRB 180324A: Swift-XRT refined Analysis
  5. GRB 180316A: Swift-XRT refined Analysis
  6. GRB 180314B: Swift-XRT refined Analysis
  7. GRB 180313A: Fermi GBM detection
  8. GRB 180314A: Swift-XRT refined Analysis
  9. GRB 180314A: Fermi GBM observation
  10. GRB 180311A: Swift-XRT refined Analysis
  11. GRB 180305A: Swift-XRT afterglow detection
  12. GRB 180305A: Fermi GBM detection
  13. GRB 180305A: Fermi-LAT detection
  14. GRB 180224A: Swift-XRT refined Analysis
  15. GRB 180222A: Swift-XRT refined Analysis
  16. Swift trigger 811074 (possible GRB 180221A): Swift refined analysis
  17. GRB 180218A: Fermi GBM Detection
  18. Swift J1658.2-4242: Swift BAT and XRT refined analysis
  19. Swift J1658.2-4242 (trigger 810300): Swift-XRT position
  20. GRB 180210A: Swift-XRT afterglow detection
  21. GRB 180205A: BAO optical observations
  22. GRB 180210A: Fermi-LAT detection
  23. GRB 180210A: Fermi GBM detection
  24. GRB 180205A: Swift-XRT refined Analysis
  25. GRB 180205A: Xinglong TNT optical observation
  26. GRB 180205A: Fermi GBM observation
  27. GRB 180204A: Fermi GBM detection
  28. GRB 180204A: Swift-XRT refined Analysis
  29. GW170817/GRB170817A: Updated results from the full Chandra dataset
  30. LIGO/Virgo GW170817: Chandra X-ray Emission Continues to Rise ~156 Days Post-Merger
  31. GRB 180120A: Fermi GBM Detection
  32. GRB 180116A CALET Gamma-Ray Burst Monitor detection
  33. GRB 180116A: Fermi GBM Detection
  34. GRB 180115A: Swift-XRT refined Analysis
  35. GRB 180113C: Fermi GBM detection
  36. GRB 180113B: Fermi GBM detection
  37. GRB 180113A: Fermi GBM observation
  38. GRB 180103A: Swift-XRT afterglow detection
  39. GRB 180111A: Swift-XRT refined Analysis
  40. GRB180111A: Xinglong TNT possible optical detection
  41. GRB 180103A: Swift/UVOT Upper Limits
  42. GRB 180103A: Swift-XRT observations
  43. GRB 180102A: Swift-XRT refined Analysis
  44. GRB 180102A: Fermi GBM detection
  45. GRB 171227A: Fermi GBM detection
  46. IceCube-171106A: Konus-Wind upper limits
  47. IceCube-171015A: Konus-Wind upper limits
  48. IceCube-170922A: Konus-Wind upper limits
  49. GRB 171223A: Fermi GBM detection
  50. GRB 171222A: Fermi GBM detection
  51. GRB 171222A: Swift-XRT refined Analysis
  52. GRB 171210A: Further Swift-XRT observations
  53. GRB 171216A: Swift-XRT refined Analysis
  54. GRB 171212A: Swift-XRT refined Analysis
  55. GRB 171212B: Fermi GBM observation
  56. GRB 171212B: Fermi-LAT detection
  57. GRB 171211A: Swift-XRT refined Analysis
  58. GRB 171210A: Swift-XRT and UVOT observations
  59. GRB 171210A: Fermi GBM detection
  60. GRB 171210A: Fermi-LAT detection
  61. GRB 171205A: SAO-RAS optical observations
  62. Swift trigger 796115 is not astrophysical
  63. GRB 171209A: Swift-XRT refined Analysis
  64. LIGO/Virgo G298048: Brightening X-ray Emission from GW170817/GRB170817A/SSS17a
  65. LIGO/Virgo G298048: Late-time detection of the X-ray afterglow with Chandra
  66. GRB 171205A: Host galaxy photometric properties
  67. GRB 171205A: Swift-XRT refined Analysis
  68. GRB 171124A: Swift-XRT afterglow detection
  69. LIGO/Virgo G299232: LOFAR follow-up
  70. GRB 171126A: Fermi GBM detection
  71. INTEGRAL pointed follow-up of IceCube-171106A
  72. GRB 171124A: Swift-XRT observations
  73. GRB 171124A: Fermi GBM observation
  74. GRB 171124A: MITSuME Akeno optical upper limits
  75. GRB 171124A: Fermi-LAT detection
  76. GRB 171123A: Swift-XRT refined Analysis
  77. GRB171120A: GWAC-F60A upper limit
  78. GRB 171120A: Fermi GBM Detection
  79. GRB 171120A: Swift-XRT refined Analysis
  80. GRB 171120A: Fermi-LAT detection
  81. Fermi-LAT Gamma-ray Observations of IceCube-171106A
  82. GRB 171115A: Swift-XRT refined Analysis
  83. GRB 171112A: Fermi GBM Detection
  84. IceCube-171106A: Swift Observations
  85. HAWC follow-up of IceCube-171106A
  86. GRB 171108A: Fermi GBM detection
  87. INTEGRAL observation of IceCube-171106A
  88. GRB 171030A: MASTER inspection of the IPN error box of the short GRB.
  89. GRB 171103A: Fermi GBM observation
  90. GRB 171102B: MITSuME Akeno optical upper limits
  91. GRB 171102B: Swift-XRT refined Analysis
  92. GRB 171102A: Fermi GBM detection
  93. GRB 171102A: Fermi-LAT detection
  94. GRB 171030A: Fermi GBM detection
  95. GRB 171030A: Swift non-localization with BAT, XRT and UVOT
  96. GRB 171022A: Fermi-LAT detection retraction
  97. AMI-LA observations of the new Be X-ray binary Swift J0243.6+6124
  98. GRB 171027A: Swift-XRT refined Analysis
  99. GRB 171022A: Fermi GBM detection
  100. GRB 171022A: Fermi-LAT detection

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