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"

6829 results found.

  1. GRB 160824B: Fermi GBM detection
  2. GRB 160822672: Fermi GBM detection
  3. GRB 160821B: Fermi GBM Detection
  4. GRB 160821B: Swift-XRT refined Analysis
  5. GRB 160821A: Fermi-LAT refined analysis
  6. GRB 160821A: Fermi GBM Detection
  7. GRB 160821A: Fermi-LAT detection of a bright burst
  8. GRB 160819A: Fermi GBM detection
  9. GRB 160815A: GWAC-F60A upper limit
  10. GRB 160816A: Swift-XRT afterglow detection
  11. GRB 160816730A: Fermi GBM detection/observation
  12. GRB 160816A: Fermi-LAT detection
  13. GRB 160815A: Swift-XRT refined Analysis
  14. GRB 160815A: Fermi GBM detection/observation
  15. IceCube 160806A: Lomonosov BDRG gamma ray prompt observations
  16. GRB 160806A: Fermi GBM observation
  17. Swift Trigger 707517 is not an astrophysical event
  18. GRB 160804A: Fermi GBM observation
  19. GRB 160804A: Swift-XRT refined Analysis
  20. GRB 160802A: Lomonosov BDRG gamma ray detection
  21. GRB 160801A: SAO RAS optical observations
  22. GRB 160802A: Fermi GBM detection
  23. GRB 160801A: Swift-XRT refined Analysis
  24. Swift follow up of IceCube-160731A
  25. HAWC follow up of IceCube 160731
  26. GRB 160726A: Fermi GBM observation
  27. GRB 160720A: Fermi GBM detection
  28. GRB 160716A: Swift-XRT refined Analysis
  29. GRB 160714A: Swift-XRT observations
  30. GRB 160714A: Fermi GBM observation
  31. GRB 160714A: Swift-XRT observations
  32. GRB 160712A: Swift-XRT refined Analysis
  33. GRB 160625B: TSHAO optical observations
  34. GRB 160709A: Swift-XRT observations
  35. GRB 160709A: Fermi GBM Observations
  36. GRB 160709A: Fermi-LAT detection
  37. GRB 160705B: Swift-XRT refined Analysis
  38. GRB 160703A: Swift-XRT afterglow detection
  39. GRB 160625B: SAO RAS monitoring
  40. GRB 160629A: Swift-XRT afterglow detection
  41. GRB 160630A: Swift/UVOT Upper Limits
  42. GRB 160630A: Swift-XRT refined Analysis
  43. GRB 160629A: Fermi GBM observation
  44. GRB 160623A: SAO RAS optical observations
  45. GRB 160625B: SAO RAS optical observations
  46. GRB 160625A: Swift-XRT refined Analysis
  47. GRB 160625B: Fermi GBM refined analysis
  48. GRB 160625B: Fermi-LAT refined analysis
  49. GRB 160625B: Swift-XRT afterglow detection
  50. GRB 160625B: Fermi-LAT detection of a bright burst
  51. GRB 160624A: Swift-XRT refined Analysis
  52. GRB 160624A: Fermi GBM observation
  53. Swift detection of a dust-scattered halo around GRB 160623A
  54. GRB 160623A: Swift-XRT afterglow detection
  55. GRB 160623A / Galactic transient: Fermi-LAT detection
  56. SGR 1617-5103 (BAT trigger 700791): Enhanced Swift-XRT position.
  57. BAT trigger 700791 (possible GRB 160622A) is SNR RCW 103
  58. GRB 160612A: Swift-XRT observations
  59. GRB 160612A: Fermi GBM detection
  60. GRB 160611A: Swift-XRT refined Analysis
  61. GRB 160607A: Swift-XRT refined Analysis
  62. GRB160601A: Kanata Telescope I- and Ks-bands upper limits
  63. GRB 160601A: Swift-XRT refined Analysis
  64. GRB 160601A: MITSuME Okayama Ks-band upper-limit
  65. GRB 160530A: Swift follow-up and X-ray afterglow candidate
  66. GRB 160530B: Fermi GBM Detection
  67. GRB 160525B: Swift-XRT refined Analysis
  68. GRB 160525B: Swift/UVOT Detection
  69. GRB 160521B: Swift-XRT afterglow detection
  70. GRB 160525B: Prompt enhanced Swift-XRT position
  71. GRB 160521B: Swift-XRT observations
  72. GRB 160521B: Fermi-LAT detection
  73. GRB 160521B: Fermi GBM detection
  74. GRB 160519A: Fermi GBM detection
  75. Interplanetary Network Search for IceCube 160427A
  76. GRB 160509A: Fermi-LAT refined analysis
  77. GRB 160509A: Fermi GBM Detection
  78. GRB 160509A: optical observations
  79. GRB 160509A: Swift-XRT afterglow detection
  80. GRB 160509A: Fermi-LAT prompt detection of a very bright burst
  81. GRB 160506A: IRSF upper limits
  82. GRB 160506A: Swift-XRT refined Analysis
  83. GRB 160504A: Swift-XRT refined Analysis
  84. GRB 160503A: Fermi GBM observation
  85. GRB 160503A: Fermi-LAT detection
  86. GRB 160501A: Swift-XRT refined Analysis
  87. IceCube-160427A: Fermi GBM Observations
  88. Archival observations by HAWC of IceCube HESE event of April 27, 2016
  89. Fermi/LAT search for counterpart to the IceCube event 67093193 (run 127853)
  90. GRB 160422A: XRT Afterglow Confirmation
  91. GRB 160425A: Swift-BAT refined analysis
  92. GRB 160425A: Swift-XRT refined Analysis
  93. GRB 160424A: Fermi GBM observation
  94. GRB 160422A: Swift-XRT afterglow detection
  95. GRB 160422A: Fermi GBM observation
  96. GRB 160422A: Fermi-LAT Detection
  97. GRB 160419A: Fermi GBM detection
  98. GRB 160417A: iTelescope T11 optical observations
  99. GRB 160417A: Swift-XRT refined Analysis
  100. GRB 160409A: Swift-XRT observations

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