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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"

27294 results found.

  1. GRB 180821A: Swift/UVOT Upper Limits
  2. GRB 180821A: Swift-BAT refined analysis
  3. GRB 180821A: Swift-XRT refined Analysis
  4. GRB 180821A: LCO Siding Springs observations
  5. GRB 180818B: 1.5m OSN optical afterglow candidate
  6. GRB 180821A: iTelescope optical afterglow detection
  7. GRB 180821A: BOOTES-3/YA optical observations
  8. GRB 180821A: Swift detection of a burst
  9. GRB180806A: confirmation of the X-ray afterglow
  10. GRB 180818B: Swift-XRT refined Analysis
  11. GRB 180818B: Swift-BAT refined analysis
  12. GRB 180818A: Swift-BAT refined analysis
  13. GRB 180818B: Fermi GBM observations
  14. GRB 180818B: Swift/UVOT Upper Limits
  15. GRB 180818A: Swift/UVOT Upper Limits
  16. GRB 180818B: Swift detection of a burst
  17. GRB 180818A: Swift-XRT refined Analysis
  18. GRB 180818A: Swift detection of a burst
  19. Swift Trigger 853790 is probably not an astrophysical source
  20. GRB 180728A: discovery of the associated supernova
  21. GRB 180809A: further Swift/XRT observations
  22. GRB 180812A: Swift/UVOT Detection
  23. GRB 180812A: Swift-BAT refined analysis
  24. GRB 180812A: Fermi GBM detection
  25. GRB 180812A: Swift-XRT refined Analysis
  26. GRB 180812A: COATLI Detection and Light Curve
  27. GRB 180812A: BOOTES-5/JGT optical afterglow detection
  28. GRB 180812A: Swift detection of a burst
  29. MASTER: OT detection during two Fermi GBM triggers (555263883 and 555263883) error boxes inspection in 22.5 mag SDSS galaxy direction
  30. GRB 180809B: Swift-XRT refined Analysis
  31. GRB 180809B, Swift-BAT refined analysis
  32. Swift Trigger 852625: Swift/BAT/XRT/UVOT observations
  33. GRB 180809B: Swift/UVOT Detection
  34. GRB 180809A: Fermi GBM observation
  35. GRB 180809A: CALET Gamma-Ray Burst Monitor detection
  36. GRB 180809B: CALET Gamma-Ray Burst Monitor detection
  37. Swift Trigger 852625: a possible GRB
  38. GRB180809B: MASTER Triple Independent Automatic OT Detection
  39. GRB 180809B: LCO Sutherland observations
  40. GRB 180809B: GROND Detection of the NIR Afterglow
  41. GRB 180809B: RATIR Optical Observations and Confirmation of Rapid Fading
  42. GRB180809B: MASTER OT observation
  43. GRB 180809A: iTelescope optical limit
  44. GRB 180809B: Swift detection of a burst with an optical afterglow
  45. GRB 180806A/180806.98: RATIR Optical Observations of MASTER OT J004613.05+242014.1
  46. GRB 180806A: Fermi GBM detection
  47. GRB 180806A/180806.94: Refined COATLI Photometry of MASTER OT J004613.05+242014.1
  48. GRB 180806.94: COATLI Detection of MASTER OT J004613.05+242014.1 and Confirmation of Fading
  49. GRB 180806.94: MASTER possible OT detection in Fermi GMB trigger 555287944 error box
  50. GRB 180805B: ESO/NTT optical observations
  51. GRB 180805B: COATLI Optical Observations
  52. GRB 180805B: 1.5m OSN I-band observation
  53. GRB 180805B: MASTER optical late inspection short GRB with extended emission
  54. GRB 180805A: Swift-XRT refined Analysis
  55. GRB 180805B: Swift-XRT refined Analysis
  56. GRB 180805B: Swift-BAT refined analysis (short GRB with extended emission)
  57. GRB 180805A: Swift-BAT refined analysis
  58. GRB 180805B: Swift/UVOT Upper Limits
  59. GRB 180805B: Fermi GBM detection
  60. GRB 180805B: Swift detection of a burst
  61. GRB 180805A: Swift detection of a burst
  62. Fermi Trigger 554765006: MASTER optical inspection
  63. FRB 180725A: MASTER optical observations of the Fast Radio Burst error box
  64. Fermi GBM trigger 554730582/180731493 is not a GRB
  65. GRB 180728A: A long GRB of the X-ray flash (XRF) subclass, expecting supernova appearance
  66. GRB 180728B: MASTER optical observations short GRB IPN error box
  67. GRB 180728A: Swift/UVOT Detection
  68. GRB 180701A/MAXI J2119-045: CALET Gamma-Ray Burst Monitor data search
  69. GRB 180727A: Swift/UVOT Upper Limits
  70. GRB 180715A: CALET CAL gamma-ray analysis
  71. GRB 180703B: CALET CAL gamma-ray analysis
  72. GRB 180728B: Fermi GBM detection
  73. IPN Triangulation of GRB 180728B (short)
  74. GRB 180728A: Swift-BAT refined analysis
  75. GRB 180728A: Fermi GBM observation
  76. GRB 180728A: Swift-XRT refined Analysis
  77. GRB 180728A: Swift-XRT observations
  78. GRB 180728A: MASTER OT (= new object) detection
  79. GRB 180727A: Swift-BAT refined analysis
  80. GRB 180728A: Swift detection of a bright burst
  81. GRB 180727A: Swift-XRT refined Analysis
  82. GRB 180727A: Fermi GBM observation
  83. GRB 180727A: Swift detection of a burst
  84. GRB 180720B: CALET Gamma-Ray Burst Monitor detection
  85. NuSTAR observations of GRB 180720B
  86. GRB 180720B: OAJ optical observations
  87. GRB 180722B: Insight-HXMT/HE detection
  88. GRB 180724A: Insight-HXMT/HE detection
  89. GRB 180723A: Fermi GBM detection
  90. GRB 180723A: CALET Gamma-Ray Burst Monitor detection
  91. GRB 180722B: CALET Gamma-Ray Burst Monitor detection
  92. GRB 180723.13: MASTER optical observation of the short Fermi GBM trigger number 554008254
  93. GRB 180722A: MASTER second inspection
  94. GRB 180723.76: MASTER optical observation of the bright long Fermi GBM trigger number 554062193
  95. GRB 180720B: D50 optical observations
  96. GRB 180720B: MASTER Global Net OT observations
  97. GRB 180720B: Testing the universality of the newly born neutron star in BdHNe
  98. GRB 180721A: BOOTES-5/JGT optical observations
  99. GRB 180720B: COATLI Optical Detection
  100. GRB 180720C: BOOTES-2/TELMA optical observations

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