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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"

21952 results found.

  1. GRB 140817A: Swift detection of a burst
  2. GRB 140815A: GROND afterglow candidate
  3. Swift Trigger 609694 is probably not an astrophysical source
  4. GRB 140815A: Swift-XRT observations
  5. GRB 140814A: Swift-XRT and UVOT observations
  6. GRB 140814A: MASTER optical follow-up inspection
  7. GRB 140814A: Swift-XRT and UVOT observations
  8. GRB 140814A: MAXI/GSC detection
  9. Konus-Wind observation of GRB 140810A
  10. Swift trigger 609139 is probably 4U 1850-03
  11. Swift observations of possible GRB 140809A candidate
  12. GRB 140809A : Virtual Telescope optical observations
  13. Konus-Wind observation of GRB 140808A
  14. GRB 140808A: Swift/UVOT Upper Limits
  15. GRB 140808A: Swift-XRT observations
  16. GRB 140801A: AAO optical observations
  17. GRB 140801A: GROND Afterglow detection, unbroken decay
  18. GRB140801A: Swift/XRT further observations
  19. GRB 140730A: GROND Upper limits
  20. GRB 140801A: BTA confirmation of redshift
  21. GRB 140801A: Swift/UVOT Upper Limits
  22. GRB 140801A: Swift-XRT observations
  23. Konus-Wind observation of GRB 140801A
  24. GRB 140801A : Virtual Telescope optical observations
  25. GRB 140801A: NOT afterglow confirmation
  26. GRB 140801A: archival upper limits on the host galaxy
  27. GRB 140801A (FERMI trigger 428612396): MASTER brigth OT discovery
  28. GRB 140730A, Swift-BAT refined analysis
  29. GRB 140709B: TShAO optical upper limit
  30. GRB 140709A, the review of the sky area in plate archives
  31. Swift Trigger 607945: possible noise event in the direction of NGC2559
  32. Konus-Wind observation of GRB 140729A
  33. GRB 140730A: Swift/UVOT Upper Limits
  34. GRB 140730A: Enhanced Swift-XRT position
  35. GRB 140730A: Swift detection of a burst
  36. Swift Trigger 607506 is probably noise
  37. GRB 140729A: Swift-XRT and UVOT observations
  38. IPN Triangulation of GRB 140729A
  39. Trigger 607399: Swift detection of SGR1806-20
  40. GRB 140723A: Swift-XRT and UVOT observations
  41. Konus-Wind observation of GRB 140723A
  42. GRB 140709B: Swift/UVOT Upper Limits
  43. Konus-Wind observation of GRB 140721A
  44. GRB 140719A: Swift/UVOT Upper Limits
  45. GRB 140716A: GROND confirmation of the afterglow
  46. GRB 140719A, Swift-BAT refined analysis
  47. GRB 140719A: GROND Afterglow candidate
  48. GRB 140719B: Zadko observatory - Gingin optical observations
  49. GRB 140719A: Enhanced Swift-XRT position
  50. GRB 140719A: Swift detection of a burst
  51. GRB 140716A: Swift/UVOT Upper Limits
  52. GRB 140713A: AMI 15 GHz detection
  53. GRB 140713A: 10.4-m GTC deep optical observation
  54. GRB 140716A: GROND afterglow candidate
  55. GRB 140716A BAT refined analysis
  56. Swift observations of a flare from UX Ari
  57. GRB 140709A: Possible AMI 15 GHz detection
  58. Swift detection of UX Ari
  59. GRB 140713A: Swift/UVOT Upper Limits
  60. GRB 140713A: NOT upper limits
  61. GRB 140713A: Enhanced Swift-XRT position
  62. GRB 140713A: Swift-BAT refined analysis
  63. GRB 140713A: T100 observations
  64. GRB 140710A: iTelescope.Net T11 Optical Observation
  65. GRB 140713A: Swift detection of a burst
  66. Swift Trigger 604111 is not a GRB
  67. Fermi GBM Observations of SGR 1935+2154
  68. GRB 140709A: Continued RATIR Optical and NIR Observations
  69. GRB 140710A: Swift/UVOT Upper Limits
  70. GRB 140709B: update of Khureltogot optical upper limit
  71. GRB 140710A: Enhanced Swift-XRT position
  72. GRB 140710A: RATIR Optical and NIR Observations
  73. GRB 140710A: GROND Detection of NIR Afterglow Candidate
  74. GRB 140709A: 10.4m GTC optical decay
  75. GRB 140710A: Swift detection of a burst
  76. GRB 140709B: Khureltogot optical upper limit
  77. GRB 140709B: Enhanced Swift-XRT position
  78. GRB 140709B: MASTER optical observation
  79. GRB 140709B: Swift detection of a burst
  80. GRB 140709A: Swift/UVOT Upper Limits
  81. GRB 140709A - UVOT-enhanced XRT position
  82. GRB 140709A: RATIR Optical and NIR Observations
  83. GRB 140709A: Swift detection of a burst
  84. GRB 140705A: Nishi-Harima NIR upper limits
  85. GRB 140705A / SGR 1935+2154: VLA 6 GHz observations
  86. GRB 140706A: Swift/UVOT Detection
  87. GRB 140703A: Swift/UVOT Upper Limits
  88. GRB140706A: GROND detection of the Optical/NIR afterglow
  89. GRB 140706A: Enhanced Swift-XRT position
  90. GRB 140706A: Swift detection of a burst with an optical counterpart
  91. SGR 1935+2154: Swift-BAT observations of additional short soft events
  92. GRB 140705A / SGR 1935+2154: Optical observations from 10.4m GTC
  93. GRB 140705A: KAIT Optical Upper Limit
  94. GRB 140705A: MITSuME Ishigakijima upper limits
  95. GRB 140705A: MITSuME Okayama upper limits
  96. GRB 140705A: Swift/UVOT Upper Limits
  97. GRB 140705A: Enhanced Swift-XRT position
  98. GRB 140705A: Swift detection of a short burst
  99. GRB 140621A: Suzaku WAM observation of the prompt emission
  100. GRB 140629A: SAO RAS Rc band photometry

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