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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').
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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"

24596 results found.

  1. GRB 190114C: OASDG optical observations
  2. GRB 190114B: BOOTES-4/MET optical afterglow detection
  3. GRB 190114C: MASTER 4-polarizations filters OT detection
  4. GRB 190114C: MASTER afterglow Detection
  5. INTEGRAL observation of IceCube-190104A
  6. GRB 190114A: Swift-BAT refined analysis
  7. Konus-Wind observation of GRB 190110A
  8. GRB 190110A, Swift-BAT refined analysis
  9. Konus-Wind observation of GRB 190103A
  10. GRB 190110A: Fermi GBM detection
  11. GRB 190110A: Swift detection of a burst
  12. GRB 181228A: FRAM-ORM optical limit
  13. GRB 190109B: Fermi GBM observation
  14. GRB 190109B: Swift-BAT refined analysis
  15. GRB 190109A: Fermi GBM observation
  16. GRB 190109A: Swift-BAT refined analysis
  17. GRB190109A: MITSuME Akeno optical upper limits
  18. GRB 190109B: Swift detection of a burst
  19. IPN triangulation of GRB 190103A (long)
  20. GRB 190109A: Swift-XRT refined Analysis
  21. IceCube-190104A: Swift-XRT observations
  22. Trigger 882561: Swift detection of MAXI J1631-479
  23. GRB 190106A : continued TSHAO optical observations
  24. Konus-Wind observation of GRB 190106A
  25. GRB 190106A: Swift-XRT refined Analysis
  26. GRB 190106A: Swift-BAT refined analysis
  27. GRB 190106A: Xinglong-2.16m spectroscopy
  28. Fermi GBM Observations of IceCube-190104A
  29. GRB 190106A: MITSuME Akeno optical observation
  30. GRB 190106A: MASTER Amur OT detection
  31. GRB 190106A: Swift detection of a burst with an optical counterpart
  32. SWIFT GRB190106.57 Global MASTER-Net OT detection
  33. Search for Counterparts to IceCube-190104A with IceCube
  34. Konus-Wind observation of GRB 190103B
  35. Search for counterpart to IceCube-190104A with ANTARES
  36. IceCube-190104A: MASTER optical observation
  37. Fermi LAT Gamma-ray Observations of IceCube-190104A
  38. GRB 190103B: Swift-BAT refined analysis
  39. IceCube-190104A - IceCube observation of a high-energy neutrino candidate event
  40. GRB 190103B: Swift-XRT refined Analysis
  41. GRB 181231A: Fermi GBM detection
  42. GRB 181231A: Fermi-LAT detection
  43. GRB 181225A: further Swift-XRT observations
  44. GRB 181228A: MITSuME Akeno optical upper limits
  45. Konus-Wind observation of GRB 181227A
  46. FRB 181228: Global MASTER Net optical inspection
  47. GRB 181227A: Global MASTER Net oprtical inspection
  48. GRB 181228A: Swift-XRT refined Analysis
  49. GRB 181228A: Swift-BAT refined analysis
  50. GRB 181222B: Swift follow-up observations of MASTER optical transient J204928.79+245744.0
  51. GRB 181228A: Fermi GBM observation
  52. IPN Triangulation of GRB 181227A (long)
  53. GRB 181228A: Global MASTER Net OT detection
  54. GRB 181225A: KAIT Follow-Up Observations with Upper Limit
  55. GRB 181228A: KAIT Optical Upper Limit
  56. GRB 181228A: Swift detection of a burst
  57. GRB 181227A: Fermi GBM detection
  58. GRB 181225A: Swift observations and X-ray candidate afterglow
  59. GRB 181225A: Global MASTER Net optical observations
  60. GRB 181225A: Fermi GBM detection
  61. GRB 181225A: Fermi-LAT Detection
  62. Konus-Wind observation of GRB 181222A
  63. GRB 181222B: Global MASTER Net observations of short bright Fermi GRB
  64. Konus-Wind observation of GRB 181222B
  65. IPN Triangulation of extremely bright short GRB 181222B
  66. GRB 181224A: Swift-BAT refined analysis
  67. GRB 181224A: Swift detection of a burst
  68. GRB 181222B: Global MASTER Net observations of the short bright Fermi GRB error box.
  69. GRB 181222B : Fermi GBM detection
  70. Trigger 878548: Swift detection of AX 1631.9-4752
  71. GRB 181222A: Fermi GBM observation
  72. Konus-Wind observation of GRB 181212A
  73. IPN Triangulation of GRB 181212A (long)
  74. GRB 181213A: Swift-BAT refined analysis
  75. GRB 181213A: GWAC-F60A upper limit
  76. GRB 181213A: Swift-XRT observations
  77. GRB 181213A: BOOTES-5/JGT optical observations
  78. SWIFT GRB181213A Global MASTER-Net bright OT discovery
  79. GRB 181213A: Swift detection of a burst
  80. GRB 181212A: Fermi GBM Detection
  81. GRB 181126B: KAIT Follow-Up Observations of a Fermi Short GRB (Trigger 564897175)
  82. MASTER: OTs detection during Fermi alert trigger 565936249 early observations
  83. INTEGRAL observations of the events in the GWTC-1 catalog
  84. GRB 181126B: Zwicky Transient Facility Follow-Up of a Fermi Short GRB (Trigger 564897175)
  85. GRB 181205A: a long GRB detected by INTEGRAL
  86. GRB181201A: Optical afterglow measurements by GROWTH-India
  87. Fermi-GBM Observations During Four New GW-Detected BBH Mergers (Correction)
  88. Fermi-GBM Observations During Four New GW-Detected BBH Mergers
  89. GRB 181201A: Continued GROND observations show that afterglow is still bright
  90. GRB181201A: GOTO optical observations
  91. GRB 181203A: Swift-BAT refined analysis
  92. Konus-Wind observation of GRB 181201A
  93. GRB 181202A: Global MASTER-Net optical observations
  94. GRB 181202A: Swift-BAT refined analysis
  95. GRB 181201A: VLT/FORS2 tentative spectroscopic redshift
  96. GRB 181201A: Global MASTER-Net prompt optical descovery and afterglow observations
  97. GRB 181202A: Swift detection of a burst with an optical counterpart
  98. GRB 181201A: Fermi-LAT detection
  99. GRB 181201A: NOT optical observations
  100. GRB 181201A MASTER-Net OT continued observation

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