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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"

21054 results found.

  1. GRB 181022A: GROND upper limits
  2. GRB 181022A: LCO Sutherland observations
  3. GRB 181023A: KAIT Optical Upper Limit
  4. GRB 181022A: Swift/UVOT Upper Limits
  5. GRB 181020A: REM detection
  6. Baksan Neutrino BNO 181021: Global MASTER-net Optical Follow-up Observations
  7. GRB 181020A: Swift/UVOT Detection
  8. GRB 181020A: Global MASTER Net OT observations
  9. GRB 181020A: LCO Cerro Tololo observations
  10. GRB 181020A: VLT/X-shooter spectroscopy and redshift
  11. Fermi-LAT Gamma-ray Observations of IceCube-181014A
  12. GRB 181013A: Swift/UVOT Upper Limits
  13. GRB 181013A: Swift-XRT afterglow detection
  14. GRB 181013A: Global MASTER Net optical observations
  15. GROND afterglow detection of GRB 181010A
  16. GRB180913A: Zwicky Transient Facility Follow-Up of a Fermi Short GRB (Trigger 558557292)
  17. GRB 181010A: REM optical and NIR afterglow detection
  18. GRB 181008B: Global MASTER Net optical inspection
  19. GRB 181010A: ePESSTO NTT optical observations
  20. GRB 181010A: Swift/UVOT Detection
  21. GRB 181010A: RATIR Optical and NIR Afterglow Detection
  22. GRB 181010A: LCO Cerro Tololo observations
  23. GRB 181010A: MASTER-Argentina OT detection
  24. GRB 181003A: RATIR Optical and NIR Observations
  25. GRB 181003A: Swift-XRT afterglow detection
  26. GRB 181003A: Swift/UVOT Upper Limits
  27. GRB 181003A: LCO Cerro Tololo observations
  28. GRB 181003A: MASTER optical observation
  29. GRB181002A: GOTO optical limits
  30. GRB 181002A: Swift/UVOT Upper Limits
  31. GRB 181003A: Swift-XRT observations
  32. GRB 181002A: MASTER optical observation
  33. GRB 180914B: RTT150 optical observations
  34. GRB 180914B: RTT150 optical observations
  35. GRB 180930A: NOT optical upper limits
  36. GRB 180930A: Swift/UVOT Upper Limits
  37. GRB 180930A: KAIT Optical Upper Limit
  38. GRB 180924A: Swift/UVOT Upper Limits
  39. GRB 180925A: VLT optical observations
  40. GRB 180925A: Swift/UVOT Detection
  41. GRB 180924A: MASTER inspection
  42. GRB 180923A: MASTER inspection MAXI/GSC error box
  43. GRB 180914B: OAJ multi-color follow-up
  44. GRB 180914B : continued TSHAO optical observations
  45. GRB 180914B: MASTER OT automatic dtection
  46. GRB 180914B : TSHAO optical observations
  47. GRB 180914B: Continued RATIR Optical and NIR Observations
  48. GRB180914B: Swift UVOT detection of an optical afterglow
  49. GRB 180914B: RATIR Optical and NIR Observations
  50. GRB 180914B: KAIT Optical Afterglow Candidate
  51. GRB 180914B: Swift-XRT afterglow detection
  52. GRB 180914A: RATIR Optical and NIR Observations
  53. GRB 180914B: Tiled Swift observations
  54. GRB 180914A: MASTER automatic inspection
  55. GRB 180914A: Swift-XRT observations
  56. GRB 180914A: Tiled Swift observations
  57. Fermi-LAT Gamma-ray Observations of IceCube-180908A
  58. Search for counterparts to IceCube-180908A with IceCube
  59. GRB 180715A: 15 GHz upper limits from the AMI Short GRB Program
  60. GRB 180718A: 15 GHz upper limits from the AMI Short GRB Program
  61. GRB 180905A: Swift/UVOT Upper Limits
  62. GRB 180905A: RATIR Optical and NIR Observations
  63. GRB 180904A: BOOTES-2/TELMA early observations
  64. GRB 180905A: BOOTES-3/YA optical observations
  65. GRB 180904A: Swift/UVOT Upper Limits
  66. GRB 180904A: RATIR Optical and NIR Observations
  67. GRB 180904A: LT early observations
  68. GRB 180904A: SAO RAS optical observations
  69. GRB 180904A: OSN observations
  70. GRB 180904A: NOT optical observations, candidate host galaxy
  71. GRB 180829A: Swift-XRT observations
  72. GRB 180828A: Swift/UVOT Upper Limits
  73. GRB 180828A: RATIR Optical and NIR Observations
  74. GRB 180829A: Tiled Swift observations
  75. GRB 180728A: classification of the associated SN 2018fip
  76. GRB 180824A: MASTER inspection IPN short GRB error box
  77. GRB 180823A: Swift/UVOT Upper Limits
  78. GRB 180823A: RATIR Optical and NIR Observations
  79. GRB 180821A: VLT observations
  80. GRB 180821A: Swift/UVOT Upper Limits
  81. GRB 180821A: LCO Siding Springs observations
  82. GRB 180818B: 1.5m OSN optical afterglow candidate
  83. GRB 180821A: iTelescope optical afterglow detection
  84. GRB 180821A: BOOTES-3/YA optical observations
  85. GRB180806A: confirmation of the X-ray afterglow
  86. GRB 180818B: Fermi GBM observations
  87. GRB 180818B: Swift/UVOT Upper Limits
  88. GRB 180818A: Swift/UVOT Upper Limits
  89. GRB 180728A: MASTER early polarization and 19 days monitoring
  90. GRB 180728A: discovery of the associated supernova
  91. GRB 180809A: further Swift/XRT observations
  92. Correction: Chandra X-ray observations of GW170817 at 1 year post-merger: increasingly rapid fading
  93. LIGO/Virgo GW170817: A steep decline in the radio light curve and prediction for the X-rays
  94. GRB 180812A: Swift/UVOT Detection
  95. Chandra X-ray observations of GW170817 at 1 year post-merger: increasingly rapid fading
  96. GRB 180809B: ePESSTO NTT NIR observations
  97. GRB 180812A: COATLI Detection and Light Curve
  98. GRB 180812A: BOOTES-5/JGT optical afterglow detection
  99. GRB180809B TUG T60 observations
  100. MASTER: OT detection during two Fermi GBM triggers (555263883 and 555263883) error boxes inspection in 22.5 mag SDSS galaxy direction

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