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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"

19610 results found.

  1. GRB 140719A: Swift detection of a burst
  2. Konus-Wind observation of GRB 140716A
  3. GRB 140716A: Swift/UVOT Upper Limits
  4. GRB 140713A: 10.4-m GTC deep optical observation
  5. GRB 140716A: GROND afterglow candidate
  6. GRB 140716A: Swift-XRT detection of an afterglow candidate
  7. GRB 140716A: A Fermi GBM Detection
  8. GRB 140716A BAT refined analysis
  9. Swift observations of a flare from UX Ari
  10. GRB 140716A found in ground analysis of Swift-BAT data
  11. Swift detection of UX Ari
  12. GRB 140713A: CARMA mm detection
  13. GRB 140713A: Fermi GBM detection
  14. GRB 140713A: Swift-XRT refined Analysis
  15. GRB 140713A: Swift/UVOT Upper Limits
  16. GRB 140713A: Enhanced Swift-XRT position
  17. GRB 140713A: Swift-BAT refined analysis
  18. GRB 140710A: iTelescope.Net T11 Optical Observation
  19. GRB 140713A: Swift detection of a burst
  20. Swift Trigger 604111 is not a GRB
  21. Fermi GBM Observations of SGR 1935+2154
  22. GRB 140709A: Continued RATIR Optical and NIR Observations
  23. GRB 140710A: Swift-XRT refined Analysis
  24. GRB 140710A: Swift-BAT refined analysis
  25. GRB 140710A: Swift/UVOT Upper Limits
  26. GRB 140710A: Enhanced Swift-XRT position
  27. GRB 140710A: RATIR Optical and NIR Observations
  28. GRB 140710A: P60 Confirmation of Afterglow
  29. GRB 140710A: GROND Detection of NIR Afterglow Candidate
  30. GRB 140710A: Swift detection of a burst
  31. GRB 140709B: Swift-XRT refined Analysis
  32. GRB 140709B: Fermi GBM detection
  33. GRB 140709B: Swift-BAT refined analysis
  34. GRB 140709B: OSN optical limit
  35. GRB 140709B: Enhanced Swift-XRT position
  36. GRB 140709A: Fermi GBM detection
  37. GRB 140709A: BOOTES-2 and OSN optical observations
  38. GRB 140709A, Swift-BAT refined analysis
  39. GRB 140709B: MASTER optical observation
  40. GRB 140709B: Swift detection of a burst
  41. GRB 140709A: Swift-XRT refined Analysis
  42. GRB 140709A: Swift/UVOT Upper Limits
  43. GRB 140709A - UVOT-enhanced XRT position
  44. GRB 140709A: RATIR Optical and NIR Observations
  45. GRB 140709A: Swift detection of a burst
  46. GRB 140705A / SGR 1935+2154: VLA 6 GHz observations
  47. GRB 140706A: Swift/UVOT Detection
  48. GRB 140703A: Swift/UVOT Upper Limits
  49. GRB 140706A: Swift-BAT refined analysis
  50. GRB 140706A: Swift-XRT refined Analysis
  51. GRB 140706A: Fermi GBM detection
  52. GRB 140703A: AAO optical observations
  53. Pre-discovery observations of SGR 1935+2154 in Swift archival data
  54. GRB140706A: GROND detection of the Optical/NIR afterglow
  55. GRB 140705A / SGR 1935+2154: Probable association with supernova remnant G57.2+0.8
  56. GRB 140706A: Enhanced Swift-XRT position
  57. GRB 140706A: Swift detection of a burst with an optical counterpart
  58. SGR 1935+2154: Swift-BAT observations of additional short soft events
  59. GRB 140705A / SGR 1935+2154: FTN observations
  60. GRB 140705A: KAIT Optical Upper Limit
  61. GRB 140705A: Swift-XRT refined Analysis
  62. GRB 140705A: Swift/UVOT Upper Limits
  63. GRB 140705A: Swift-BAT refined analysis of a possible newly discovered SGR 1935+2154
  64. GRB 140705A: Enhanced Swift-XRT position
  65. GRB 140705A: Swift detection of a short burst
  66. GRB 140621A: Suzaku WAM observation of the prompt emission
  67. GRB 140629A, Optical observations
  68. GRB 140703A: RATIR Optical and NIR Observations
  69. GRB 140703A: Fermi GBM detection
  70. GRB 140703A: Swift-XRT refined Analysis
  71. GRB 140703A: Swift-BAT refined analysis
  72. GRB 140703A: Enhanced Swift-XRT position
  73. GRB 140703A: BOOTES-2 and OSN optical observations
  74. GRB 140703A: Swift detection of a burst
  75. GRB 140629A: MASTER-Net preliminary light curve
  76. GRB 140629A: SAO RAS monitoring
  77. Konus-Wind observation of GRB 140629A
  78. GRB 140629A: Swift/UVOT Detection
  79. GRB 140629A: P60 observations
  80. GRB 140629A: Swift-XRT refined Analysis
  81. GRB 140629A: BTA redshift
  82. GRB140629A: Kanata/HOWPol optical observation
  83. GRB 140629A: T100 observations
  84. GRB 140629A: Swift-BAT refined analysis
  85. GRB 140629A: Enhanced Swift-XRT position
  86. GRB 140629A: MASTER OT detection
  87. GRB 140629A: Swift detection of a burst with an optical counterpart
  88. GRB 140628A: GROND observation of the afterglow
  89. GRB 140628A: Swift-XRT refined Analysis
  90. GRB 140628A: Zadko observatory - Gingin optical observations
  91. GRB 140628A: Swift-BAT refined analysis
  92. GRB 140628A: Swift/UVOT Detection
  93. GRB 140628A: Swift/UVOT Detection
  94. GRB 140628A: Swift-XRT afterglow detection and enhanced position
  95. GRB 140626A: TAROT La Silla observatory optical observations
  96. GRB 140622A: TAROT La Silla observatory optical observations
  97. GRB 140628A: Swift detection of a burst
  98. Swift Trigger 602668: XRT and UVOT confirm is not astrophysical source
  99. GRB 140623A: further Swift-XRT observations
  100. Swift Trigger 602668 is probably not an astrophysical source

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