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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.

Advanced Search Examples (click to copy):

subject:"Swift"
body:"GRB"
submitter:"Judith Racusin"

39463 results found.

  1. GRB 131118A: Fermi GBM detection
  2. GRB 131108A: VLA Observations
  3. GRB 131030A, Optical Observations
  4. GRB 131117A, Swift-BAT refined analysis
  5. Fermi GBM trigger 406351590 / 131117143 is not a GRB
  6. GRB 131117A: TAROT La Silla observatory optical observations
  7. GRB 131117A: Swift/UVOT Detection
  8. GRB 131117A: Swift-XRT refined Analysis
  9. GRB 131117A: VLT/X-shooter redshift
  10. GRB 131117A: GROND confirmation of the afterglow and photo-z.
  11. GRB 131117A: Enhanced Swift-XRT position
  12. GRB 131117A: Skynet PROMPT optical detection of an afterglow
  13. GRB 131117A: Swift detection of a burst
  14. GRB 130925A: HST imaging
  15. GRB 131110A: Swift-XRT and UVOT upper limits
  16. GRB 131110A BAT refined analysis
  17. GRB 131031A: Mondy optical observations
  18. GRB 131108A: ISON Blagoveshensk upper limit
  19. GRB 131108A: optical observations
  20. GRB 131110A found in ground analysis of BAT slew event data
  21. GRB 131108A: Continued RATIR Optical and NIR Observations
  22. GRB 131030A: MITSuME Akeno Optical observation
  23. Konus-Wind observation of GRB 131108A
  24. GRB 131108A: AGILE/GRID observation
  25. GRB 131108A: CARMA 3mm detection
  26. GRB 131108A: Fermi GBM observation
  27. GRB 131108A: Swift/UVOT Detection
  28. GRB 131108A: RATIR Optical and NIR Observations
  29. GRB 131108A: Swift-XRT observations
  30. GRB 131108A: TAROT-Calern optical observation
  31. GRB 131108A: Fermi-LAT refined analysis
  32. GRB 131108A: NOT optical observations
  33. GRB 131108A: Redshift from 10.4m GTC
  34. GRB 131108A: 1.23m CAHA optical candidate
  35. GRB 131108A: Swift detection of a possible X-ray afterglow
  36. IPN triangulation of GRB 131108A - correction
  37. IPN triangulation of GRB 131108A
  38. GRB 131108A Tiled Swift observations
  39. GRB 131108A: Fermi-LAT onboard detection of a burst
  40. GRB 131030A: RATIR Optical and NIR Upper Limits
  41. GRB 131030A: Continued RATIR Optical and NIR Observations
  42. GRB 131031A: Swift-XRT afterglow confirmation
  43. GRB 131029A: Suzaku WAM observation of the prompt emission
  44. GRB 131105A, Swift-BAT refined analysis
  45. GRB 131105A: Swift-XRT refined Analysis
  46. GRB 131103A: Swift-BAT refined analysis
  47. GRB 131030A: Swift-BAT refined analysis
  48. GRB 131105A: Fermi GBM observation
  49. GRB 131105A: Swift/UVOT Upper Limits
  50. GRB 131024B: Suzaku WAM observation of the prompt emission
  51. Konus-Wind observation of GRB 131105A
  52. GRB 131103A: VLT/X-shooter redshift
  53. GRB 131105A: VLT/X-shooter redshift
  54. GRB 131105A: TAROT La Silla observatory optical observations
  55. GRB 131105A: Enhanced Swift-XRT position
  56. GRB 131105A: VLT/X-shooter optical afterglow candidate
  57. GRB 131105A: Swift detection of a burst
  58. GRB 131103A: NOT and VLT observations
  59. GRB 131030A: Continued RATIR Optical and NIR Observations
  60. GRB 131103A: Swift/UVOT Detection
  61. GRB 131103A: Enhanced Swift-XRT position
  62. GRB 131103A: Swift-XRT refined Analysis
  63. GRB 131103A: Swift detection of a burst
  64. GRB 131031A: RATIR Optical and NIR Observations and Upper Limits
  65. GRB131031A: RATIR Optical and NIR Observations
  66. GRB 131018B: RATIR Optical/NIR Observations
  67. GRB 131030A: Continued RATIR Optical and NIR Observations
  68. GRB 131030A: the 2nd epoch of SAO RAS observations
  69. GRB 131031A: Fermi GBM detection
  70. GRB 131031A: Swift/UVOT Upper Limits
  71. LOAO B,R Observation of GRB131030A
  72. GRB 131018B: Further Swift-XRT observations.
  73. GRB 131030A - RoboPol optical afterglow polarimetry
  74. GRB 131031A: MASTER optical observation
  75. Konus-Wind observation of GRB 131031A
  76. GRB 131030A: Bassano Bresciano Observatory optical observations
  77. GRB 131031A: 1.23m CAHA afterglow candidate
  78. GRB131030A : xinglong TNT optical observation
  79. GRB 131031A: Swift-XRT observations
  80. GRB 131030A: P60 observations
  81. GRB 131031A: 1.23m CAHA I-band and 1.5m OSN R-band observations of Swift/BAT error circle
  82. GRB 131031A found in ground analysis of BAT data
  83. GRB 131030A: RATIR Optical and NIR Observations
  84. GRB 131030A: TAROT La Silla observatory optical observations
  85. GRB 131030A: T21 optical observations
  86. GRB 131030A: Swift-XRT refined Analysis
  87. GRB 131030A: Enhanced Swift-XRT position
  88. GRB 131024C: ICSP discovery of a burst in X-rays by balloon borne study
  89. GRB 131030A: Swift/UVOT Detection
  90. Konus-Wind observation of GRB 131030A
  91. GRB 131030A: SAO RAS optical observations
  92. GRB 131030A: 1.23m CAHA BVRI-band observations
  93. GRB 131030A: D50+BART detection and light curve optical decay
  94. GRB 131029A: Nanshan optical observations
  95. GRB 131030A: Spectroscopy from 10.4m GTC
  96. GRB 131030A: NOT redshift
  97. GRB 131030A - Liverpool Telescope Optical Afterglow Confirmation
  98. GRB 131030A: MASTER optical observation
  99. GRB 131029A: Swift-XRT follow up
  100. GRB 131030A: Watcher OT detection

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