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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"

45825 results found.

  1. GRB 140818B: Fermi GBM detection
  2. GRB140818B : GROND afterglow candidate
  3. GRB 140818B: Enhanced Swift-XRT position
  4. GRB 140818B: OSN I-band afterglow candidate
  5. GRB 140817A: Swift/UVOT Afterglow Detection
  6. GRB 140818B: Swift detection of a burst
  7. GRB 140818A - Fermi GBM Detection
  8. Swift detection of SAX J1712.6-3739
  9. GRB 140818A: Swift-XRT and UVOT potential afterglow detection
  10. GRB 140818A: Correction to GCN 16702
  11. Konus-Wind observation of GRB 140817A
  12. GRB 140818A Tiled Swift observations
  13. GRB 140818A: MAXI/GSC detection
  14. GRB 140817A: Swift-XRT refined Analysis
  15. GRB 140817A: Fermi GBM Detection
  16. GRB 140817A: Swift-BAT refined analysis
  17. GRB 140817A draft circular on nearby galaxy
  18. GRB 140817A: Enhanced Swift-XRT position
  19. GRB 140817A: Swift-XRT position
  20. GRB 140817A: Swift detection of a burst
  21. GRB 140808A / PTFeag: VLA K-band observations
  22. GRB 140815A: GROND afterglow candidate
  23. Swift Trigger 609694 is probably not an astrophysical source
  24. GRB 140815A: Swift-XRT observations
  25. GRB 140815A: A long GRB detected by INTEGRAL
  26. GRB 140814A: Swift-XRT and UVOT observations
  27. GRB 140814A: MASTER optical follow-up inspection
  28. GRB 140814A: Swift-XRT and UVOT observations
  29. GRB 140814A: MAXI/GSC detection
  30. Swift Mission Operations Center Moving
  31. GRB 140808A / iPTF14eag optical follow-up at HCT
  32. IPN triangulation of GRB 140810A
  33. GRB 140808A: Confirmation of the Swift-XRT afterglow
  34. GRB140809A: Fermi GBM observation
  35. GRB 140810A: Fermi GBM observation
  36. Konus-Wind observation of GRB 140810A
  37. GRB140810A: Fermi-LAT detection
  38. Swift trigger 609139 is probably 4U 1850-03
  39. Swift observations of possible GRB 140809A candidate
  40. GRB 140809A : Virtual Telescope optical observations
  41. GRB 140809A (FERMI trigger 429246673): MASTER follow-up inspection
  42. Konus-Wind observation of GRB 140808A
  43. GRB 140808A: Swift/UVOT Upper Limits
  44. GRB 140808A: Redshift from the 10.4m GTC telescope
  45. GRB 140808A: Swift-XRT observations
  46. GRB 140808A: Fermi GBM detection
  47. GRB 140808A: optical afterglow candidate iPTF14eag
  48. GRB 140801A: AAO optical observations
  49. GRB 140801A: GROND Afterglow detection, unbroken decay
  50. GRB140801A: Swift/XRT further observations
  51. GRB 140730A: GROND Upper limits
  52. GRB 140801A: BTA confirmation of redshift
  53. GRB 140801A: Swift/UVOT Upper Limits
  54. GRB 140801A: Swift-XRT observations
  55. Konus-Wind observation of GRB 140801A
  56. GRB 140801A : Virtual Telescope optical observations
  57. GRB 140801A: Fermi GBM observation
  58. GRB 140801A: Redshift from the 10.4m GTC telescope
  59. GRB 140801A: NOT afterglow confirmation
  60. IPN triangulation of GRB 140801A (Fermi trigger 428612396)
  61. GRB 140801A: archival upper limits on the host galaxy
  62. GRB 140801A (FERMI trigger 428612396): MASTER brigth OT discovery
  63. GRB 140730A, Swift-BAT refined analysis
  64. GRB 140709B: TShAO optical upper limit
  65. GRB 140709A, the review of the sky area in plate archives
  66. Swift Trigger 607945: possible noise event in the direction of NGC2559
  67. Konus-Wind observation of GRB 140729A
  68. GRB 140730A: LCO-Sutherland observations
  69. GRB 140730A: Swift-XRT refined Analysis
  70. GRB 140730A: Swift/UVOT Upper Limits
  71. GRB 140730A: Enhanced Swift-XRT position
  72. GRB 140730A: Prompt enhanced Swift-XRT position
  73. GRB 140730A: Swift detection of a burst
  74. Radio upper limit on the GRB 140713A with the GMRT
  75. GRB 140729A: iPTF optical upper limit
  76. Swift Trigger 607506 is probably noise
  77. GRB 140729A: Swift-XRT and UVOT observations
  78. IPN Triangulation of GRB 140729A
  79. GRB 140729A: Fermi-GBM detection
  80. Correction to Fermi-LAT GCN Circular 16633
  81. GRB 140729A Tiled Swift observations
  82. GRB 140729A: Fermi-LAT detection
  83. Trigger 607399: Swift detection of SGR1806-20
  84. GRB 140723A: Swift-XRT and UVOT observations
  85. GRB 140723A: LCO-Sutherland optical candidate retraction
  86. GRB 140723A: MASTER optical observation
  87. Konus-Wind observation of GRB 140723A
  88. GRB 140723A: LCO-Sutherland optical candidate
  89. GRB 140723A: Fermi GBM detection
  90. IPN Triangulation of GRB 140723A
  91. GRB 140723A Tiled Swift observations
  92. GRB 140723A: Fermi-LAT detection
  93. GRB 140709B: Swift/UVOT Upper Limits
  94. Konus-Wind observation of GRB 140721A
  95. IPN Triangulation of GRB 140721A
  96. GRB 140719B: Swift XRT observation
  97. GRB 140719A: Swift/UVOT Upper Limits
  98. GRB 140721A: Fermi GBM detection
  99. GRB 140716A: Confirmation of the Swift-XRT afterglow
  100. GRB 140719B, Swift-BAT refined analysis

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