Skip to main content
JSON Notices via Email, Kafka Cron Jobs, Submitter Profile, GCN is Hiring. See news and announcements

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"

12176 results found.

  1. GRB 140423A: HCT optical observations
  2. Trigger 599041: Swift detection of SFXT IGR J16479-4514
  3. GRB 140515A: Swift detection of a burst
  4. Konus-Wind observation of GRB 140512A
  5. Fermi GBM Trigger 140429551 - Detection of a burst from SGR 1806-20
  6. GRB 140509B: MAXI/GSC detection
  7. GRB 140509A: Swift/UVOT Detection and photo-z
  8. GRB 140509A: Swift-XRT refined Analysis
  9. Konus-Wind observation of GRB 140508A
  10. GRB 140508A: Swift-XRT observations
  11. GRB 140509A: Swift detection of a burst with an optical counterpart
  12. GRB 140508A: SAO RAS and MASTER photometric and spectroscopic observations
  13. Konus-Wind observation of GRB 140506A
  14. Konus-Wind observation of GRB 140423A
  15. GRB 140430A: iTelescope.Net T16 Optical Observation
  16. GRB 140502A: Swift-BAT refined analysis
  17. GRB 140502A: Fermi GBM observation
  18. GRB 140502A: Swift detection of a burst
  19. GRB 140430A : Liverpool Telescope optical afterglow observations
  20. GRB140430A: Swift detection of a burst with an optical counterpart
  21. Konus-Wind observation of GRB 140428B
  22. IPN Triangulation of GRB 140428B (short/hard)
  23. Trigger 597570: Swift detection of SGR 1806-20
  24. GRB 140428A: NOT observations
  25. DG CVn: optical observations
  26. GRB 140423A: Nishi-Harima NIR Observations
  27. GRB 140423A: Swift-XRT refined Analysis
  28. Swift Trigger 596958 is positionally consistent with V* DG CVn/2XMM J133146.4+291635
  29. GRB 140423A: KAIT Optical Detection
  30. GRB 140423A: Swift-XRT observations
  31. GRB 140423A: optical afterglow candidate
  32. GRB 140423A: Swift detection of a burst
  33. GRB 140419A: Mondy optical observations
  34. GRB140419A: NOT optical observations
  35. GRB 140419A: KAIT Refined Analysis
  36. Konus-Wind observation of GRB 140419A
  37. GRB 140419A: Swift-XRT refined Analysis
  38. Konus-Wind observation of GRB 140416A
  39. GRB 140414A: Swift/UVOT Upper Limit
  40. Konus-Wind observation of GRB 140413A
  41. GRB 140413A: Swift-XRT refined Analysis
  42. GRB 140412A: Swift detection of a burst
  43. Swift Trigger 595345 is not an astrophysical source
  44. Fermi418277210: iPTF optical observations
  45. GRB 140402A: Fermi-LAT detection of a burst
  46. GRB 140331A: Swift-XRT refined Analysis
  47. Konus-Wind observation of GRB 140330A
  48. GRB 140330A: Fermi-LAT Detection
  49. GRB 140329A: Fermi-LAT detection
  50. Konus-Wind observation of GRB 140329A
  51. GRB 140320D: Suzaku WAM observation of the prompt emission
  52. GRB 140320C: Mondy optical observations and afterglow confirmation
  53. Konus-Wind observation of GRB 140323A
  54. GRB 140323A: Fermi-LAT detection
  55. GRB 140323A: Swift-XRT refined Analysis
  56. GRB 140323A: Swift-BAT refined analysis
  57. GRB 140323A: Swift detection of a burst
  58. Konus-Wind observation of GRB 140320D
  59. GRB 140320B: P60 detection of a very red afterglow
  60. IPN Triangulation of very intense GRB 140320D
  61. GRB 140320C: Swift-XRT observations
  62. GRB 140320A: Fermi GBM detection
  63. GRB 140320B: Swift-XRT detection of the afterglow
  64. GRB 140320C: Mondy optical observations
  65. GRB 140320C: MASTER optical observations
  66. GRB 140320C: FTN optical observations
  67. GRB 140320C: A long GRB detected by INTEGRAL
  68. GRB 140320B: ISON-NM optical observations
  69. GRB 140320B: A long GRB detected by INTEGRAL
  70. GRB 140320B: FTN optical afterglow candidate
  71. GRB 140318A: Swift-BAT refined analysis
  72. GRB 140311B: Mondy optical limit
  73. GRB 140311A: Mondy optical limits
  74. GRB 140318A: Swift-XRT refined Analysis
  75. GRB 140318A: NOT detection of the afterglow
  76. GRB140308A: Suzaku WAM observation of the prompt emission
  77. GRB 140311A: Montarrenti Observatory optical upper limit
  78. GRB 140311A: Swift-XRT refined Analysis
  79. GRB 140311B: Swift-XRT refined Analysis
  80. GRB 140311B: TAROT Calern observatory optical observations
  81. GRB 140311B: Swift-XRT observations
  82. Konus-Wind observation of GRB 140308A
  83. IPN Triangulation of GRB 140308A
  84. Konus-Wind observation of GRB 140306A
  85. IPN Triangulation of GRB 140306A
  86. GRB 140305A: Swift-BAT refined analysis
  87. Trigger 590503: Swift-BAT triggered on noise
  88. GRB 140305A: Swift detection of a burst
  89. GRB 140304A: Swift-XRT refined Analysis
  90. GRB 140304A: Redshift from the NOT
  91. GRB 140304A: NOT observations and redshift estimate
  92. GRB 140304A: Swift detection of a burst
  93. GRB140302A: Fermi GBM detection
  94. GRB 140302A: Swift-XRT refined Analysis
  95. GRB 140301A: Swift-BAT refined analysis
  96. GRB 140301A: Swift-XRT refined Analysis
  97. GRB 140301A: Swift detection of a burst
  98. Konus-Wind observation of GRB 140226A
  99. iPTF14yb: Swift-XRT detection
  100. GRB 140219A: MAXI/GSC detection

Advanced

Download all Circulars as a .tar.gz archive (updated once a day):
Questions or comments?
Contact GCN directly.
Have you found a bug in GCN?
Open an issue.
Want to contribute code to GCN?
Get involved on GitHub.

gcn.nasa.gov

A service of the Astrophysics Science Division at NASA Goddard Space Flight Center

Looking for U.S. government information and services? Visit USA.gov