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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"

43969 results found.

  1. GRB 180224A: AbAO optical observations
  2. GRB 180224A: Swift-BAT refined analysis
  3. GRB 180224A: RATIR Optical Observations
  4. GRB 180224A: Swift-XRT refined Analysis
  5. GRB180224A: Global MASTER-Net bright OT detection
  6. GRB 180224A: Enhanced Swift-XRT position
  7. GRB 180224A: Swift detection of a burst with an optical counterpart
  8. GRB 180218A: AstroSat CZTI detection
  9. MAXI J1813-095 source: AbAO optical observations
  10. GRB 180222A: Swift/UVOT Upper Limits
  11. GRB 180221B CALET Gamma-Ray Burst Monitor detection
  12. GRB 180222A: Swift-XRT refined Analysis
  13. GRB 180222A: Swift-BAT refined analysis
  14. GRB 180222A: Enhanced Swift-XRT position
  15. GRB 180222A: A long GRB detected by INTEGRAL
  16. GRB 180222A: Swift detection of a burst
  17. Swift trigger 811074 (possible GRB 180221A): Swift refined analysis
  18. Swift Trigger 811167: Detection of MAXI J1813-095
  19. GRB 180205A: Mondy optical observations
  20. GRB 180219A CALET Gamma-Ray Burst Monitor detection
  21. GRB180221A: MASTER-OAFA optical observations
  22. Swift Trigger 811074: possible GRB 180221A
  23. Konus-Wind observation of GRB 180218A
  24. GRB 180218A CALET Gamma-Ray Burst Monitor detection
  25. GRB 180218A: Fermi GBM Detection
  26. IPN Triangulation of GRB 180218A (long/bright)
  27. GRB 180204A: 15 GHz upper limits from AMI
  28. GRB 180112A: AstroSat CZTI detection
  29. Fermi GBM triggers 540405116/180215689 and 540476225/180216512 are not a GRBs
  30. Swift J1658.2-4242: Swift BAT and XRT refined analysis
  31. Swift trigger 810300: MASTER-OAFA robotic report
  32. Swift J1658.2-4242 (trigger 810300): Swift-XRT position
  33. Swift Trigger 810300 is a probable new Galactic source: Swift J1658.2-4242
  34. Konus-Wind observation of GRB 180210A
  35. GRB 180205A: SEDM Observations
  36. GRB 180210A: Swift-XRT afterglow detection
  37. GRB 180210A: Tiled Swift observations
  38. GRB 180205A: BAO optical observations
  39. Retraction of Swift trigger 809374
  40. GRB 180210A: Swift ToO observations
  41. GRB 180210A: Fermi-LAT detection
  42. GRB 180210A: Fermi GBM detection
  43. Trigger 809374: Swift detection of a possible non-burst faint source
  44. Trigger 809217: Swift trigger on RS CVn Star HD 8357
  45. GRB180205A: Optical observations with DOAO 1m telescope
  46. GRB 180205A: AbAO optical observations
  47. Fermi-GBM Detection of possible burst from AXP CXOU J164710.2-455216/PSR J1647-4552
  48. GRB 180205A optical observations
  49. GRB 180202A: Insight-HXMT/HE detection
  50. GRB 180205A: confirmation of Swift-BAT trigger time.
  51. GRB 180205A: Optical observations
  52. GRB 180205A: Swift/UVOT Detection
  53. GRB 180205A: Nanshan-1m optical observations
  54. GRB 180205A: Swift-XRT refined Analysis
  55. GRB 180205A: Swift-BAT refined analysis
  56. GRB 180205A: Xinglong TNT optical observation
  57. GRB 180205A: Further GROND Observations reveal Afterglow is still bright
  58. GRB 180205A: Nickel telescope optical observations
  59. Swift Trigger on AXP CXOU J164710.2-455216/PSR J1647-4552
  60. GRB 180205A: VLT polarimetry
  61. GRB 180205A: Mondy optical observations
  62. GRB 180205A: Fermi GBM observation
  63. Konus-Wind observation of GRB 180204A
  64. GRB 180205A: VLT/X-shooter redshift
  65. GRB 180205A: GROND detection of the NIR/optical afterglow
  66. GRB 180205A: KAIT optical afterglow confirmation
  67. GRB 180205A: Swift detection of a burst with a bright optical counterpart
  68. GRB 180204A: Swift-BAT refined analysis
  69. GRB 180204A: Swift/UVOT Upper Limits
  70. GRB 180204A: Fermi GBM detection
  71. GRB 180204A: Enhanced Swift-XRT position
  72. GRB 180204A: Swift-XRT refined Analysis
  73. GRB 180204A: Swift detection of a short burst
  74. GW170817/GRB170817A: Updated results from the full Chandra dataset
  75. GRB 180126A CALET Gamma-Ray Burst Monitor detection
  76. GW170817/GRB170817A: Preliminary results of Chandra monitoring
  77. LIGO/Virgo GW170817: Chandra X-ray Emission Continues to Rise ~156 Days Post-Merger
  78. GRB 180120A: AstroSat CZTI detection
  79. Fermi GBM trigger 538030981/180119210 is not a GRB
  80. LIGO/Virgo G298048 GRAWITA: VST-ESO PARANAL follow up of AT2017gfo
  81. GRB 180120A: Fermi GBM Detection
  82. GRB 180120A CALET Gamma-Ray Burst Monitor detection
  83. Fermi GBM trigger 538316685/180122517 is not a GRB
  84. GRB 180113B: AstroSat CZTI detection
  85. GRB 180113A: AstroSat CZTI detection
  86. GRB 180115A: SEDM Observations
  87. GRB 180116A CALET Gamma-Ray Burst Monitor detection
  88. Konus-Wind observation of GRB 171209A
  89. GRB 180113A CALET Gamma-Ray Burst Monitor detection
  90. GRB 180112A CALET Gamma-Ray Burst Monitor detection
  91. GRB 180116A: Fermi GBM Detection
  92. Konus-Wind observation of GRB 180113B
  93. IPN Triangulation of GRB 180113B
  94. GRB 180112A: Insight-HXMT/HE detection/observation
  95. GRB 180111A AROMA-N optical observation
  96. Konus-Wind observation of GRB 180113C
  97. e-MERLIN detection of GRB 171205A
  98. IPN Triangulation of GRB 180113C
  99. GRB 180115A: Swift-BAT refined analysis
  100. GRB 180116A: MAXI/GSC detection

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