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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"

28098 results found.

  1. GRB 140808A: optical afterglow candidate iPTF14eag
  2. GRB 140801A: AAO optical observations
  3. GRB 140801A: GROND Afterglow detection, unbroken decay
  4. GRB140801A: Swift/XRT further observations
  5. GRB 140730A: GROND Upper limits
  6. GRB 140801A: BTA confirmation of redshift
  7. GRB 140801A: Swift/UVOT Upper Limits
  8. GRB 140801A: Swift-XRT observations
  9. GRB 140801A : Virtual Telescope optical observations
  10. GRB 140801A: Fermi GBM observation
  11. GRB 140801A: NOT afterglow confirmation
  12. GRB 140730A, Swift-BAT refined analysis
  13. GRB 140709B: TShAO optical upper limit
  14. GRB 140709A, the review of the sky area in plate archives
  15. Swift Trigger 607945: possible noise event in the direction of NGC2559
  16. GRB 140730A: LCO-Sutherland observations
  17. GRB 140730A: Swift-XRT refined Analysis
  18. GRB 140730A: Swift/UVOT Upper Limits
  19. GRB 140730A: Enhanced Swift-XRT position
  20. GRB 140730A: Swift detection of a burst
  21. GRB 140729A: iPTF optical upper limit
  22. Swift Trigger 607506 is probably noise
  23. GRB 140729A: Swift-XRT and UVOT observations
  24. IPN Triangulation of GRB 140729A
  25. GRB 140729A: Fermi-GBM detection
  26. Correction to Fermi-LAT GCN Circular 16633
  27. GRB 140729A: Fermi-LAT detection
  28. Trigger 607399: Swift detection of SGR1806-20
  29. GRB 140723A: Swift-XRT and UVOT observations
  30. GRB 140723A: LCO-Sutherland optical candidate retraction
  31. GRB 140723A: MASTER optical observation
  32. Konus-Wind observation of GRB 140723A
  33. GRB 140723A: LCO-Sutherland optical candidate
  34. GRB 140723A: Fermi GBM detection
  35. IPN Triangulation of GRB 140723A
  36. GRB 140723A Tiled Swift observations
  37. GRB 140723A: Fermi-LAT detection
  38. GRB 140709B: Swift/UVOT Upper Limits
  39. GRB 140719B: Swift XRT observation
  40. GRB 140719A: Swift/UVOT Upper Limits
  41. GRB 140721A: Fermi GBM detection
  42. GRB 140716A: Confirmation of the Swift-XRT afterglow
  43. GRB 140719B, Swift-BAT refined analysis
  44. GRB 140716A: GROND confirmation of the afterglow
  45. GRB 140719A, Swift-BAT refined analysis
  46. GRB 140719A: GROND Afterglow candidate
  47. GRB 140719B: Zadko observatory - Gingin optical observations
  48. GRB 140719A: Swift-XRT refined Analysis
  49. GRB 140719A: Enhanced Swift-XRT position
  50. GRB 140719A: Swift detection of a burst
  51. Konus-Wind observation of GRB 140716A
  52. GRB 140716A: Swift/UVOT Upper Limits
  53. GRB 140713A: AMI 15 GHz detection
  54. GRB 140713A: 10.4-m GTC deep optical observation
  55. GRB 140716A: GROND afterglow candidate
  56. GRB 140716A: Swift-XRT detection of an afterglow candidate
  57. GRB 140716A BAT refined analysis
  58. Swift observations of a flare from UX Ari
  59. GRB 140709A: Possible AMI 15 GHz detection
  60. Swift detection of UX Ari
  61. GRB 140714A: Fermi GBM detection
  62. GRB 140713A: Swift-XRT refined Analysis
  63. GRB 140713A: Swift/UVOT Upper Limits
  64. GRB 140713A: NOT upper limits
  65. GRB 140713A: Enhanced Swift-XRT position
  66. GRB 140713A: Swift-BAT refined analysis
  67. GRB 140713A: T100 observations
  68. GRB 140710A: iTelescope.Net T11 Optical Observation
  69. GRB 140713A: Swift detection of a burst
  70. Swift Trigger 604111 is not a GRB
  71. GRB 140710B: Fermi GBM detection
  72. Fermi GBM Observations of SGR 1935+2154
  73. GRB 140710B: a long GRB detected with INTEGRAL
  74. GRB 140709A: Continued RATIR Optical and NIR Observations
  75. GRB 140710A: Swift-XRT refined Analysis
  76. GRB 140710A: Swift-BAT refined analysis
  77. GRB 140710A: Swift/UVOT Upper Limits
  78. GRB 140709B: update of Khureltogot optical upper limit
  79. GRB 140710A: Enhanced Swift-XRT position
  80. GRB 140710A: RATIR Optical and NIR Observations
  81. GRB 140710A: GROND Detection of NIR Afterglow Candidate
  82. GRB 140709A: 10.4m GTC optical decay
  83. GRB 140710A: Swift detection of a burst
  84. GRB 140709B: Swift-XRT refined Analysis
  85. GRB 140709B: Swift-BAT refined analysis
  86. GRB 140709B: Khureltogot optical upper limit
  87. GRB 140709B: Enhanced Swift-XRT position
  88. GRB 140709A: Fermi GBM detection
  89. GRB 140709A, Swift-BAT refined analysis
  90. GRB 140709B: Swift detection of a burst
  91. GRB 140709A: Swift-XRT refined Analysis
  92. GRB 140709A: Swift/UVOT Upper Limits
  93. GRB 140709A - UVOT-enhanced XRT position
  94. GRB 140709A: RATIR Optical and NIR Observations
  95. GRB 140709A: Swift detection of a burst
  96. GRB 140705A: Nishi-Harima NIR upper limits
  97. GRB 140705A / SGR 1935+2154: VLA 6 GHz observations
  98. GRB 140706A: Swift/UVOT Detection
  99. GRB 140703A: Swift/UVOT Upper Limits
  100. GRB 140706A: Swift-BAT refined analysis

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