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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"

37789 results found.

  1. GRB 190706B: Swift-BAT refined analysis
  2. GRB 190706B: Swift-XRT refined Analysis
  3. GRB 190706B: Enhanced Swift-XRT position
  4. GRB 190706B: Prompt enhanced Swift-XRT position
  5. GRB 190706B: Swift detection of a burst
  6. GRB 190706A: MAXI/GSC detection
  7. Fermi trigger No 584007338 Global MASTER-Net observations report
  8. IceCube-190704A: Upper limits from Insight-HXMT/HE observations
  9. Fermi-LAT Gamma-ray Observations of IceCube-190704A and detection of the new gamma-ray source 1WHSP J104516.2+275133
  10. GRB 190627A: Discovery Channel Telescope late time observations
  11. LIGO/Virgo IceCube-190704A: No counterpart candidates in INTEGRAL SPI- ACS and IBIS prompt observation
  12. IceCube-190704A: not observable by Fermi-GBM
  13. IceCube-190704A - IceCube observation of a high-energy neutrino candidate event
  14. Konus-Wind observation of GRB 190701B
  15. GRB 190530A: Observation of the afterglow by NOEMA
  16. Fermi trigger No 583854113 Global MASTER-Net observations report
  17. GRB 190701A, Swift-BAT refined analysis
  18. GRB 190628B - AstroSat CZTI detection
  19. LIGO/Virgo S190701ah: Upper limits from Insight-HXMT/HE observations
  20. Fermi Gamma-ray Burst Monitor trigger 190626526/583245413 is not a GRB
  21. Fermi-LAT Gamma-ray Observations of IceCube-190629A
  22. LIGO/Virgo S190701ah: No counterpart candidates in the Swift/BAT Observations
  23. IPN triangulation of GRB 190630A (short)
  24. LIGO/Virgo S190630ag: Upper limits from Insight-HXMT/HE observations
  25. LIGO/Virgo S190701ah: Upper limits from Fermi-GBM Observations
  26. GRB 190701A: Swift-XRT refined Analysis
  27. GRB 190630C: Swift-XRT refined Analysis
  28. GRB 190701A: Swift/UVOT Upper Limits
  29. LIGO/Virgo S190701ah: No counterpart candidates in INTEGRAL SPI-ACS prompt observation
  30. GRB 190630B: Tien Shan and Koshka Zeiss-1000 optical upper limits
  31. GRB 190630C: ISON-Castelgrande optical upper limit
  32. GRB 190701A: COATLI Optical Observations
  33. GRB 190630C: Swift/UVOT Upper Limits
  34. GRB 190630C: KAIT Optical Upper Limit
  35. GRB 190630B: Swift/UVOT Upper Limits
  36. GRB 190630C: Swift-BAT refined analysis
  37. GRB 190701A: Enhanced Swift-XRT position
  38. GRB 190630C: AstroSat CZTI detection
  39. LIGO/Virgo S190630ag: No counterpart candidates in the Swift/BAT Observations
  40. GRB 190701A: MAXI/GSC detection
  41. GRB 190701B: a long GRB detected by IBAS
  42. GRB 190701A: Prompt enhanced Swift-XRT position
  43. GRB 190701A: Swift detection of a burst
  44. LIGO/Virgo S190630ag: No counterpart candidates in Fermi-LAT observations
  45. GRB 190630B: KAIT Optical Afterglow Confirmation
  46. GRB 190630C: Enhanced Swift-XRT position
  47. LIGO/Virgo S190630ag: Upper limits from Fermi-GBM Observations
  48. GRB 190630C: Swift detection of a burst
  49. LIGO/Virgo S190630ag: No counterpart candidates in INTEGRAL SPI-ACS prompt observation
  50. GRB 190630B: Swift-XRT refined Analysis
  51. GRB 190630B, Swift-BAT refined analysis
  52. IceCube-190629A: Upper limits from Fermi-GBM Observations
  53. GRB 190627A: VLT/FORS2 spectroscopic redshift
  54. Fermi trigger No 583567803 Global MASTER-Net observations report
  55. GRB Swift Trigger 912102: KAIT Optical Afterglow Candidate
  56. Swift Trigger 912102: possible GRB 190630B
  57. GRB 190630A: Fermi GBM Final Real-time Localization
  58. GRB 190627A: Koshka Zeiss-1000 optical counterpart observations
  59. IceCube-190629A - IceCube observation of a high-energy neutrino candidate event
  60. GRB 190627A : Xinglong 2.16m optical observation
  61. GRB 190627A: Swift-XRT refined Analysis
  62. GRB 190627A: GMG observation at the second epoch
  63. GRB 190627A: NOT optical observations
  64. GRB 190627A: Optical imaging by D50 from Ondrejov
  65. GRB 190627A: NIR imaging from Liverpool Telescope
  66. GRB 190627A: Optical imaging and spectroscopy from Calar Alto
  67. GRB 190627A: NUTTelA-TAO optical counterpart observations
  68. GRB 190627A: Swift-BAT refined analysis (short-soft burst)
  69. GRB 190610A: Further Swift-XRT observations
  70. GRB 190628A: Fermi GBM Final Real-time Localization
  71. GRB 190627A: GMG observation
  72. GRB 190627A: MASTER optical counterpart observation
  73. GRB190627A: VIRT Afterglow observation
  74. GRB 190627A: Montarrenti Observatory optical detection
  75. GRB 190627A: NUTTelA-TAO optical observations
  76. Fermi trigger No 583327924 Global MASTER-Net observations report
  77. GRB 190627A: Enhanced Swift-XRT position
  78. GRB 190627A: Swift/UVOT Detection
  79. GRB 190627A: Swift detection of a burst
  80. Fermi trigger No 583245413 Global MASTER-Net observations report
  81. Fermi trigger No 583245413 Global MASTER-Net observations report
  82. Fermi trigger No 583221986 Global MASTER-Net observations report
  83. GRB 190626B: Fermi GBM Final Real-time Localization
  84. GRB 190619B: AstroSat CZTI detection
  85. GRB 190626A: Fermi GBM Final Real-time Localization
  86. Fermi trigger No 583111521 Global MASTER-Net observations report
  87. Swift Trigger 911102: a possible GRB
  88. GRB 190623A: Fermi GBM Final Real-time Localization
  89. Fermi trigger No 582886211 Global MASTER-Net observations report
  90. GRB 190622A: BALROG localization (Fermi Trigger 582886211 / GRB 190622368)
  91. GRB 190622A: Fermi GBM Final Real-time Localization
  92. Fermi trigger No 582856902 Global MASTER-Net observations report
  93. GRB 190615B: AstroSat CZTI detection
  94. Fermi trigger No 582748289 Global MASTER-Net observations report
  95. Fermi trigger No 582759998 Global MASTER-Net observations report
  96. Fermi-LAT Gamma-ray Observations of IceCube-190619A
  97. GRB 190620A: BALROG localization (Fermi Trigger 582725415 / GRB 190620507)
  98. GRB 190620A: Fermi GBM Final Real-time Localization
  99. Fermi trigger No 582615488 Global MASTER-Net observations report
  100. IceCube-190619A: No counterpart candidates in INTEGRAL SPI-ACS and IBIS prompt observation

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