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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"

43889 results found.

  1. GRB 140817A: Enhanced Swift-XRT position
  2. GRB 140817A: Swift-XRT position
  3. GRB 140817A: Swift detection of a burst
  4. GRB 140808A / PTFeag: VLA K-band observations
  5. GRB 140815A: GROND afterglow candidate
  6. Swift Trigger 609694 is probably not an astrophysical source
  7. GRB 140815A: Swift-XRT observations
  8. GRB 140815A: A long GRB detected by INTEGRAL
  9. GRB 140814A: Swift-XRT and UVOT observations
  10. GRB 140814A: MASTER optical follow-up inspection
  11. GRB 140814A: Swift-XRT and UVOT observations
  12. GRB 140814A: MAXI/GSC detection
  13. Swift Mission Operations Center Moving
  14. GRB 140808A / iPTF14eag optical follow-up at HCT
  15. IPN triangulation of GRB 140810A
  16. GRB 140808A: Confirmation of the Swift-XRT afterglow
  17. GRB140809A: Fermi GBM observation
  18. GRB 140810A: Fermi GBM observation
  19. Konus-Wind observation of GRB 140810A
  20. GRB140810A: Fermi-LAT detection
  21. Swift trigger 609139 is probably 4U 1850-03
  22. Swift observations of possible GRB 140809A candidate
  23. GRB 140809A : Virtual Telescope optical observations
  24. GRB 140809A (FERMI trigger 429246673): MASTER follow-up inspection
  25. Konus-Wind observation of GRB 140808A
  26. GRB 140808A: Redshift from the 10.4m GTC telescope
  27. GRB 140808A: Swift-XRT observations
  28. GRB 140808A: Fermi GBM detection
  29. GRB 140808A: optical afterglow candidate iPTF14eag
  30. GRB 140801A: AAO optical observations
  31. GRB 140801A: GROND Afterglow detection, unbroken decay
  32. GRB140801A: Swift/XRT further observations
  33. GRB 140730A: GROND Upper limits
  34. GRB 140801A: BTA confirmation of redshift
  35. GRB 140801A: Swift-XRT observations
  36. Konus-Wind observation of GRB 140801A
  37. GRB 140801A : Virtual Telescope optical observations
  38. GRB 140801A: Fermi GBM observation
  39. GRB 140801A: Redshift from the 10.4m GTC telescope
  40. GRB 140801A: NOT afterglow confirmation
  41. IPN triangulation of GRB 140801A (Fermi trigger 428612396)
  42. GRB 140801A: archival upper limits on the host galaxy
  43. GRB 140801A (FERMI trigger 428612396): MASTER brigth OT discovery
  44. GRB 140730A, Swift-BAT refined analysis
  45. GRB 140709B: TShAO optical upper limit
  46. GRB 140709A, the review of the sky area in plate archives
  47. Swift Trigger 607945: possible noise event in the direction of NGC2559
  48. Konus-Wind observation of GRB 140729A
  49. GRB 140730A: LCO-Sutherland observations
  50. GRB 140730A: Swift-XRT refined Analysis
  51. GRB 140730A: Enhanced Swift-XRT position
  52. GRB 140730A: Prompt enhanced Swift-XRT position
  53. GRB 140730A: Swift detection of a burst
  54. Radio upper limit on the GRB 140713A with the GMRT
  55. GRB 140729A: iPTF optical upper limit
  56. Swift Trigger 607506 is probably noise
  57. GRB 140729A: Swift-XRT and UVOT observations
  58. IPN Triangulation of GRB 140729A
  59. GRB 140729A: Fermi-GBM detection
  60. GRB 140729A Tiled Swift observations
  61. GRB 140729A: Fermi-LAT detection
  62. Trigger 607399: Swift detection of SGR1806-20
  63. GRB 140723A: Swift-XRT and UVOT observations
  64. GRB 140723A: LCO-Sutherland optical candidate retraction
  65. GRB 140723A: MASTER optical observation
  66. Konus-Wind observation of GRB 140723A
  67. GRB 140723A: LCO-Sutherland optical candidate
  68. GRB 140723A: Fermi GBM detection
  69. IPN Triangulation of GRB 140723A
  70. GRB 140723A Tiled Swift observations
  71. GRB 140723A: Fermi-LAT detection
  72. GRB 140709B: Swift/UVOT Upper Limits
  73. Konus-Wind observation of GRB 140721A
  74. IPN Triangulation of GRB 140721A
  75. GRB 140719B: Swift XRT observation
  76. GRB 140721A: Fermi GBM detection
  77. GRB 140716A: Confirmation of the Swift-XRT afterglow
  78. GRB 140719B, Swift-BAT refined analysis
  79. GRB 140716A: GROND confirmation of the afterglow
  80. GRB 140719A, Swift-BAT refined analysis
  81. GRB 140719A: FTS observations
  82. GRB 140719A: GROND Afterglow candidate
  83. GRB 140719B: Zadko observatory - Gingin optical observations
  84. GRB 140719B: Swift detection of a burst
  85. GRB 140719A: Swift-XRT refined Analysis
  86. GRB 140719A: Enhanced Swift-XRT position
  87. GRB 140719A: Swift detection of a burst
  88. Konus-Wind observation of GRB 140716A
  89. GRB 140713A: AMI 15 GHz detection
  90. GRB 140713A: 10.4-m GTC deep optical observation
  91. GRB 140716A: GROND afterglow candidate
  92. GRB 140716A: Swift-XRT detection of an afterglow candidate
  93. GRB 140716A: A Fermi GBM Detection
  94. GRB 140716A BAT refined analysis
  95. Swift observations of a flare from UX Ari
  96. GRB 140716A found in ground analysis of Swift-BAT data
  97. GRB 140709A: Possible AMI 15 GHz detection
  98. Swift detection of UX Ari
  99. GRB 140713A: CARMA mm detection
  100. GRB 140714A: Fermi GBM detection

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