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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"

28119 results found.

  1. GRB 140710A: RATIR Optical and NIR Observations
  2. GRB 140710A: GROND Detection of NIR Afterglow Candidate
  3. GRB 140709A: 10.4m GTC optical decay
  4. GRB 140710A: Swift detection of a burst
  5. GRB 140709B: Swift-XRT refined Analysis
  6. GRB 140709B: Swift-BAT refined analysis
  7. GRB 140709B: Khureltogot optical upper limit
  8. GRB 140709B: Enhanced Swift-XRT position
  9. GRB 140709A: Fermi GBM detection
  10. GRB 140709A, Swift-BAT refined analysis
  11. GRB 140709B: Swift detection of a burst
  12. GRB 140709A: Swift-XRT refined Analysis
  13. GRB 140709A: Swift/UVOT Upper Limits
  14. GRB 140709A - UVOT-enhanced XRT position
  15. GRB 140709A: RATIR Optical and NIR Observations
  16. GRB 140709A: Swift detection of a burst
  17. GRB 140705A: Nishi-Harima NIR upper limits
  18. GRB 140705A / SGR 1935+2154: VLA 6 GHz observations
  19. GRB 140706A: Swift/UVOT Detection
  20. GRB 140703A: Swift/UVOT Upper Limits
  21. GRB 140706A: Swift-BAT refined analysis
  22. GRB 140706A: Swift-XRT refined Analysis
  23. GRB140706A: GROND detection of the Optical/NIR afterglow
  24. GRB 140706A: Enhanced Swift-XRT position
  25. GRB 140706A: Swift detection of a burst with an optical counterpart
  26. SGR 1935+2154: Swift-BAT observations of additional short soft events
  27. GRB 140705A / SGR 1935+2154: Optical observations from 10.4m GTC
  28. GRB 140705A: MITSuME Ishigakijima upper limits
  29. GRB 140705A: Swift-XRT refined Analysis
  30. GRB 140705A: MITSuME Okayama upper limits
  31. GRB 140705A: Swift/UVOT Upper Limits
  32. GRB 140705A: Swift-BAT refined analysis of a possible newly discovered SGR 1935+2154
  33. GRB 140705A: Enhanced Swift-XRT position
  34. GRB 140705A: Swift detection of a short burst
  35. GRB 140621A: Suzaku WAM observation of the prompt emission
  36. GRB 140629A: SAO RAS Rc band photometry
  37. GRB 140629A, Optical observations
  38. GRB 140703A: RATIR Optical and NIR Observations
  39. GRB 140703A: Monte Agliale Observatory optical observations
  40. GRB 140703A: Swift-XRT refined Analysis
  41. GRB 140703A: Swift-BAT refined analysis
  42. GRB 140703A: Enhanced Swift-XRT position
  43. GRB 140703A: BOOTES-2 and OSN optical observations
  44. GRB 140703A: Swift detection of a burst
  45. GRB 140619C: Suzaku WAM observation of the prompt emission
  46. GRB 140629A: MITSuME Akeno Optical observation
  47. GRB 140629A: SAO RAS monitoring
  48. Fermi 425667201: optical counterpart search
  49. GRB 140629A: Nishi-Harima NIR Observations
  50. Konus-Wind observation of GRB 140629A
  51. GRB 140629A: Swift/UVOT Detection
  52. GRB140629A: VATT optical observations
  53. GRB 140629A: P60 observations
  54. GRB 140629A: Swift-XRT refined Analysis
  55. GRB 140629A: MITSuME Ishigakijima Optical Observation
  56. GRB 140629A: T100 observations
  57. GRB 140629A: NOT optical observations
  58. GRB 140629A: KWFC z-band photometry
  59. GRB 140629A: RTT150 optical observations
  60. GRB 140629A: Swift-BAT refined analysis
  61. GRB 140629A: Enhanced Swift-XRT position
  62. GRB 140629A: Swift detection of a burst with an optical counterpart
  63. GRB 140628A: GROND observation of the afterglow
  64. GRB 140628A: Swift-XRT refined Analysis
  65. GRB 140628A: Zadko observatory - Gingin optical observations
  66. GRB 140628A: Swift-BAT refined analysis
  67. GRB 140628A: Swift/UVOT Detection
  68. GRB 140628A: Swift/UVOT Detection
  69. GRB 140628A: Swift-XRT afterglow detection and enhanced position
  70. GRB 140626A: TAROT La Silla observatory optical observations
  71. GRB 140622A: TAROT La Silla observatory optical observations
  72. GRB 140628A: Swift detection of a burst
  73. GRB 140619B: Magellan near-infrared observations
  74. Swift Trigger 602668: XRT and UVOT confirm is not astrophysical source
  75. Swift Trigger 602668 is probably not an astrophysical source
  76. GRB 140626A: Swift-BAT refined analysis
  77. GRB 140626A: Swift-XRT refined Analysis
  78. GRB 140626A: Swift/UVOT Upper Limits
  79. GRB 140626A: Enhanced Swift-XRT position
  80. GRB 140626A: GROND Afterglow Candidate
  81. GRB 140619B: Suzaku WAM observation of the prompt emission
  82. GRB 140626A: Swift detection of a burst
  83. GRB 140624A: Fermi GBM observation of a short burst
  84. GRB 140623A: Swift-XRT and UVOT observations
  85. GRB 140623A / iPTF14cyb: Fermi GBM detection
  86. GRB 140621A: Swift-XRT observations
  87. GRB 140622A: iTelescope.Net T11 Optical Observation
  88. GRB 140621A: Fermi GBM detection
  89. GRB 140622A: Swift/UVOT Upper Limits
  90. IPN Triangulation of GRB 140621A
  91. Konus-Wind observation of GRB 140619A
  92. Fermi 425193729 / iPTF14cyb: Discovery of optical afterglow
  93. GRB 140620A / iPTF14cva: Konkoly optical observations
  94. GRB 140622A: Swift-XRT refined Analysis
  95. GRB 140622A: An unusual short event, Swift-BAT refined analysis
  96. GRB 140622A: VLT/X-shooter redshift
  97. GRB 140622A: RATIR Optical and NIR Observations
  98. GRB 140622A: GROND Upper limits
  99. GRB 140622A: Enhanced Swift-XRT position
  100. GRB 140622A: Swift detection of a short burst

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