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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"

21090 results found.

  1. GRB 190114B: Swift/UVOT Upper Limits
  2. GRB 190114A: Swift/UVOT Observations
  3. GRB 190114C: Optical observations
  4. GRB 190114C: A type 1 BdHN with TeV emission
  5. GRB 190114B: NOT optical counterpart
  6. GRB 190114C: X-shooter observations of a highly extinguished afterglow
  7. GRB 190114C: Fermi GBM detection
  8. GRB 190114C: GROND detection of the afterglow
  9. MAGIC detects the GRB 190114C in the TeV energy domain
  10. GRB 190114C: OASDG optical observations
  11. GRB 190114A: NOT optical observations
  12. GRB 190114B: Mondy optical afterglow detection
  13. GRB 190114C: NOT optical counterpart and redshift
  14. GRB 190114B: BOOTES-4/MET optical afterglow detection
  15. GRB 190114C: MASTER 4-polarizations filters OT detection
  16. GRB 190103B: Swift/UVOT Upper Limits
  17. GRB 190114A: GROND detection of the afterglow
  18. GRB 190114A: VLT/X-shooter redshift
  19. Correction to GCN Circular 23663: GRB 190109A: Swift UVOT Upper Limits
  20. GRB 190106A: GMG continued observation
  21. GRB 190106A: OSN Afterglow Observations
  22. GRB 190109B: Swift/UVOT Upper Limits
  23. GRB 190109A: Swift/UVOT Upper Limits
  24. GRB 190106A: optical observations, possible jet break detection
  25. GRB 190106A: Liverpool Telescope observations
  26. GRB 190109B: COATLI Optical Observations
  27. GRB 190109B: BOOTES-5/JGT optical observations
  28. GRB 190109B: Swift-XRT observations
  29. IceCube-190104A: Swift-XRT observations
  30. GRB 190106A: Mondy optical observations
  31. Trigger 882561: Swift detection of MAXI J1631-479
  32. GRB 190106A : continued TSHAO optical observations
  33. GRB 190106A: NEXT-0.6m and Xinglong-2.16m photometric single powerlaw decay
  34. GRB 190106A: GMG photometry in the 2nd night
  35. GRB 190106A: VLT/X-shooter redshift confirmation
  36. GRB 190106A: GMG spectral results
  37. GRB 190106A: OASDG optical observations
  38. GRB 190106A: BOOTES-4/MET optical observations
  39. GRB 190106A: Swift/UVOT Detection
  40. GRB 190106A: Bassano Bresciano Observatory optical detection
  41. Fermi GBM Observations of IceCube-190104A
  42. GRB 190106A : TSHAO optical observations
  43. GRB 190106A: GMG detection
  44. GRB 190106A: MASTER Amur OT detection
  45. SWIFT GRB190106.57 Global MASTER-Net OT detection
  46. IceCube-190104A: MASTER optical observation
  47. Fermi LAT Gamma-ray Observations of IceCube-190104A
  48. GRB 190103B: Bassano Bresciano observatory upper limit
  49. GRB 181201A: photometric signature of the SN
  50. GRB 181231A: BOOTES-2/TELMA optical observations
  51. GRB 181225A: further Swift-XRT observations
  52. FRB 181228: Global MASTER Net optical inspection
  53. GRB 181227A: Global MASTER Net oprtical inspection
  54. GRB 181222B: Swift follow-up observations of MASTER optical transient J204928.79+245744.0
  55. GRB 181228A: Swift/UVOT Upper Limits
  56. GRB 181228A: Global MASTER Net OT detection
  57. GRB 181228A: REM NIR detection
  58. GRB 181225A: KAIT Follow-Up Observations with Upper Limit
  59. GRB 181228A: KAIT Optical Upper Limit
  60. GRB 181222B: Swift ToO observations
  61. GRB 181225A: Swift observations and X-ray candidate afterglow
  62. GRB 181225A: Global MASTER Net optical observations
  63. GRB 181225A: Swift ToO observations
  64. GRB 181222B: Global MASTER Net observations of short bright Fermi GRB
  65. GRB 181222B: Global MASTER Net observations of the short bright Fermi GRB error box.
  66. GRB 181213A: Swift/UVOT Observations
  67. GRB 181213A: Mondy optical observations
  68. GRB 181213A: continued TSHAO optical observations
  69. GRB 181213A: AbAO optical observations
  70. GRB 181213A: HMM-0.5m, NEXT-0.6m, CNEOST-1m optical observations
  71. GRB 181213A: NOT optical observations
  72. GRB 181126A: MeerKAT radio observation
  73. GRB 181213A : TSHAO optical observations
  74. GRB 181213A: Swift-XRT observations
  75. GRB 181213A: BOOTES-5/JGT optical observations
  76. SWIFT GRB181213A Global MASTER-Net bright OT discovery
  77. GRB 181126B: KAIT Follow-Up Observations of a Fermi Short GRB (Trigger 564897175)
  78. GRB 181201A: continued optical observations in Mondy
  79. MASTER OT J063515.49-624002.9 of Fermi trigger 565936249: optical observations in SAAO
  80. MASTER: OTs detection during Fermi alert trigger 565936249 early observations
  81. GRB 181201A: VLA detection
  82. GRB 181201A: ALMA detection of a fading mm afterglow
  83. INTEGRAL observations of the events in the GWTC-1 catalog
  84. GRB 181203A: GROND detection of the afterglow
  85. GRB 181126B: Zwicky Transient Facility Follow-Up of a Fermi Short GRB (Trigger 564897175)
  86. GRB 181201A: continued optical observations in TSHAO and Chilesope
  87. GRB 181203A: BOOTES-3/YA optical observations
  88. Swift Trigger 874754 is likely not an astrophysical event
  89. Fermi-GBM Observations During Four New GW-Detected BBH Mergers (Correction)
  90. GRB 181201A: continued optical observations in TSHAO
  91. Fermi-GBM Observations During Four New GW-Detected BBH Mergers
  92. GRB 181203A: Swift/UVOT Upper Limits
  93. GRB 181201A: Continued GROND observations show that afterglow is still bright
  94. GRB181201A: GOTO optical observations
  95. GRB 181201A: Swift/UVOT Detection
  96. GRB 181202A: Swift/UVOT Detection
  97. GRB 181201A: continued optical observations in SAAO and Chilesope
  98. GRB 181202A: RATIR Optical and NIR Observations
  99. GRB 181201A: Further COATLI Optical Monitoring
  100. GRB 181202A: Global MASTER-Net optical observations

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