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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"

39492 results found.

  1. Swift trigger 609139 is probably 4U 1850-03
  2. Swift observations of possible GRB 140809A candidate
  3. GRB 140809A : Virtual Telescope optical observations
  4. GRB 140809A (FERMI trigger 429246673): MASTER follow-up inspection
  5. Konus-Wind observation of GRB 140808A
  6. GRB 140808A: Swift/UVOT Upper Limits
  7. GRB 140808A: Redshift from the 10.4m GTC telescope
  8. GRB 140808A: Swift-XRT observations
  9. GRB 140808A: Fermi GBM detection
  10. GRB 140808A: optical afterglow candidate iPTF14eag
  11. GRB 140801A: AAO optical observations
  12. GRB 140801A: GROND Afterglow detection, unbroken decay
  13. GRB140801A: Swift/XRT further observations
  14. GRB 140730A: GROND Upper limits
  15. GRB 140801A: BTA confirmation of redshift
  16. GRB 140801A: Swift/UVOT Upper Limits
  17. GRB 140801A: Swift-XRT observations
  18. Konus-Wind observation of GRB 140801A
  19. GRB 140801A : Virtual Telescope optical observations
  20. GRB 140801A: Fermi GBM observation
  21. GRB 140801A: Redshift from the 10.4m GTC telescope
  22. GRB 140801A: NOT afterglow confirmation
  23. IPN triangulation of GRB 140801A (Fermi trigger 428612396)
  24. GRB 140801A: archival upper limits on the host galaxy
  25. GRB 140801A (FERMI trigger 428612396): MASTER brigth OT discovery
  26. GRB 140730A, Swift-BAT refined analysis
  27. GRB 140709B: TShAO optical upper limit
  28. GRB 140709A, the review of the sky area in plate archives
  29. Konus-Wind observation of GRB 140729A
  30. GRB 140730A: LCO-Sutherland observations
  31. GRB 140730A: Swift-XRT refined Analysis
  32. GRB 140730A: Swift/UVOT Upper Limits
  33. GRB 140730A: Enhanced Swift-XRT position
  34. GRB 140730A: Prompt enhanced Swift-XRT position
  35. GRB 140730A: Swift detection of a burst
  36. Radio upper limit on the GRB 140713A with the GMRT
  37. GRB 140729A: iPTF optical upper limit
  38. GRB 140729A: Swift-XRT and UVOT observations
  39. IPN Triangulation of GRB 140729A
  40. GRB 140729A: Fermi-GBM detection
  41. GRB 140729A Tiled Swift observations
  42. GRB 140729A: Fermi-LAT detection
  43. Trigger 607399: Swift detection of SGR1806-20
  44. GRB 140723A: Swift-XRT and UVOT observations
  45. GRB 140723A: LCO-Sutherland optical candidate retraction
  46. GRB 140723A: MASTER optical observation
  47. Konus-Wind observation of GRB 140723A
  48. GRB 140723A: LCO-Sutherland optical candidate
  49. GRB 140723A: Fermi GBM detection
  50. IPN Triangulation of GRB 140723A
  51. GRB 140723A Tiled Swift observations
  52. GRB 140723A: Fermi-LAT detection
  53. GRB 140709B: Swift/UVOT Upper Limits
  54. Konus-Wind observation of GRB 140721A
  55. IPN Triangulation of GRB 140721A
  56. GRB 140719B: Swift XRT observation
  57. GRB 140719A: Swift/UVOT Upper Limits
  58. GRB 140721A: Fermi GBM detection
  59. GRB 140716A: Confirmation of the Swift-XRT afterglow
  60. GRB 140719B, Swift-BAT refined analysis
  61. GRB 140716A: GROND confirmation of the afterglow
  62. GRB 140719A, Swift-BAT refined analysis
  63. GRB 140719A: FTS observations
  64. GRB 140719A: GROND Afterglow candidate
  65. GRB 140719B: Zadko observatory - Gingin optical observations
  66. GRB 140719B: Swift detection of a burst
  67. GRB 140719A: Swift-XRT refined Analysis
  68. GRB 140719A: Enhanced Swift-XRT position
  69. GRB 140719A: Swift detection of a burst
  70. Konus-Wind observation of GRB 140716A
  71. GRB 140716A: Swift/UVOT Upper Limits
  72. GRB 140713A: AMI 15 GHz detection
  73. GRB 140713A: 10.4-m GTC deep optical observation
  74. GRB 140716A: GROND afterglow candidate
  75. GRB 140716A: Swift-XRT detection of an afterglow candidate
  76. GRB 140716A: A Fermi GBM Detection
  77. GRB 140716A BAT refined analysis
  78. GRB 140716A found in ground analysis of Swift-BAT data
  79. GRB 140709A: Possible AMI 15 GHz detection
  80. Swift detection of UX Ari
  81. GRB 140713A: CARMA mm detection
  82. GRB 140714A: Fermi GBM detection
  83. Radio upper limits on the GRB 140703A with the GMRT
  84. GRB 140713A: Fermi GBM detection
  85. GRB 140713A: Swift-XRT refined Analysis
  86. GRB 140713A: Swift/UVOT Upper Limits
  87. GRB 140713A: NOT upper limits
  88. GRB 140713A : Xinglong TNT upper limit
  89. GRB 140713A: Enhanced Swift-XRT position
  90. GRB 140713A: Swift-BAT refined analysis
  91. GRB 140713A: T100 observations
  92. GRB 140710A: iTelescope.Net T11 Optical Observation
  93. GRB 140713A: Swift detection of a burst
  94. Swift Trigger 604111 is not a GRB
  95. GRB 140710B: Fermi GBM detection
  96. GRB 140710B: improved INTEGRAL position
  97. GRB 140710B: a long GRB detected with INTEGRAL
  98. GRB 140709A: Continued RATIR Optical and NIR Observations
  99. GRB 140710A: Swift-XRT refined Analysis
  100. GRB 140710A: Swift-BAT refined analysis

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