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"

27226 results found.

  1. GRB 160802A: Lomonosov BDRG gamma ray detection
  2. GRB 160801A: Swift/UVOT Upper Limits
  3. GRB 160802A: Fermi GBM detection
  4. GRB 160726A: CALET Gamma-Ray Burst Monitor detection
  5. GRB 160801A: Swift-XRT refined Analysis
  6. GRB 160801A: Swift-BAT refined analysis
  7. Global MASTER net follow up of IceCube-160731A
  8. Swift follow up of IceCube-160731A
  9. GRB 160801A: Swift detection of a burst
  10. GRB 160716A: TAROT La Silla observatory optical observations
  11. GRB160720A: Astrosat CZTI detection
  12. GRB160709A: Astrosat CZTI detection of short GRB
  13. GBM observation of SGR-like burst from the direction of PSR 1119-6127
  14. Trigger 706396: Swift detection of a short burst from PSR 1119-6127
  15. GRB 160726A, Swift-BAT refined analysis
  16. GRB 160726A: Fermi GBM observation
  17. GRB 160726A: Swift detection of a short burst
  18. GRB 160721A: CALET Gamma-Ray Burst Monitor detection
  19. GRB 160720A CALET Gamma-Ray Burst Monitor detection
  20. GRB 160720A: Lomonosov BDRG gamma ray detection and MASTER limit
  21. GRB 160703, GRB 160705, GRB 160720, SGR1935+2154: First SGRs and GRBs detected by Lomonosov.
  22. GRB 160720A: Fermi GBM detection
  23. Fermi GBM trigger 490701713/160720418 is not a GRB
  24. Fermi GBM trigger 490365157/160716523 is not a GRB
  25. GRB 160716A: Swift/UVOT Detection
  26. GRB 160714A: Swift/UVOT Upper Limits
  27. GRB 160716A: Swift-BAT refined analysis
  28. GRB 160716A: Swift-XRT refined Analysis
  29. GRB 160716A: Swift detection of a burst
  30. Swift Trigger 704327: KAIT Optical Observations
  31. Swift Trigger 704444 is probably not an astrophysical event.
  32. GRB 160712A: Swift-BAT refined analysis
  33. GRB 160714A: TAROT Calern observatory optical observations
  34. GRB 160714A: Fermi GBM observation
  35. GRB 160623A: optical astrometry, photometry, and redshift
  36. Swift-BAT trigger 704327 was due to noise
  37. Fermi GBM trigger 490193747/160714539 is not a GRB
  38. GRB 160714A: Swift-BAT refined analysis,
  39. Swift Trigger 704327: MASTER syncronous optical observations
  40. GRB 160714A: MASTER early optical observations
  41. GRB 160712A: Further GROND observations
  42. GRB 160709A CALET Gamma-Ray Burst Monitor detection
  43. Swift Trigger 704327: a possible GRB
  44. GRB 160714A: Swift-XRT observations
  45. GRB 160714A: Swift detection of a short burst
  46. GRB 160712A: Swift/UVOT Upper Limits
  47. GRB 160712A: RATIR Optical and NIR Observations
  48. GRB 160712A: GROND observations
  49. GRB 160712A: Swift-XRT refined Analysis
  50. GRB 160712A: Skynet R-COP observations
  51. GRB 160712A: Initial Swift/UVOT observations
  52. GRB 160712A: Swift-XRT observations
  53. GRB 160712A: Global MASTER-Net optical observation
  54. GRB 160712A: Swift detection of a burst
  55. GRB 160625B: Global MASTER-Crimea prompt optical emission detection (fwd)
  56. GRB 160709A: MASTER early imaging Swift BAT error box
  57. GRB 160709A, Swift-BAT detection and localization
  58. GRB 160709A: Global MASTER Net Fermi GBM Alerts observations
  59. GRB 160709A: Fermi GBM Observations
  60. GRB 160709A: Fermi-LAT detection
  61. Fermi GBM trigger 489771293/160709649 is not a GRB
  62. GRB 160705B: TAROT Calern observatory optical observations
  63. GRB 160628A CALET Gamma-Ray Burst Monitor detection
  64. SGR 1935+2154: CALET Gamma-Ray Burst Monitor detections
  65. GRB 160705B: Swift/UVOT Upper Limits
  66. GRB 160705B: RATIR Optical and NIR Observations and Confirmation of the Fading Afterglow
  67. GRB 160705B: Swift-BAT refined analysis
  68. GRB 160623A: Astrosat CZTI detection
  69. GRB 160705B: Swift-XRT refined Analysis
  70. GRB 160705B: LT optical candidate
  71. GRB 160705B: Swift detection of a burst
  72. GRB 160703A: Swift/UVOT Detection
  73. GRB 160703A: MITSuME Akeno Optical Observations
  74. GRB 160703A: Bassano Bresciano Observatory upper limits
  75. GRB 160703A: Swift-BAT refined analysis
  76. GRB 160703A: Zadko observatory - Gingin optical observations
  77. GRB 160703A: Swift detection of a burst
  78. Swift trigger #702630 is not an astrophysical event
  79. GRB 160629A: Swift/UVOT Upper Limits
  80. GRB 160630A: Swift-BAT refined analysis
  81. GRB 160629A: Global MASTER Net Prompt OT observations
  82. GRB 160630A: Skynet PROMPT-CTIO observations of the optical afterglow
  83. GRB 160630A: Zadko observatory - Gingin optical observations
  84. GRB 160630A: TAROT La Silla observatory optical observations
  85. GRB 160630A: Swift/UVOT Upper Limits
  86. GRB 160630A: Swift-XRT refined Analysis
  87. GRB 160625A: GROND upper limits
  88. GRB 160629A: Fermi GBM observation
  89. GRB 160630A: GROND Afterglow Detection
  90. GRB 160630A: Swift detection of a burst
  91. GRB 160629A: SAO RAS independent OT detection
  92. GRB 160629A: TAROT Calern observatory optical detection
  93. GRB 160625B CALET Gamma-Ray Burst Monitor detection
  94. Pi of the Sky detection of an optical flash accompanying GRB 160625B
  95. GRB 160623A: SAO RAS optical observations
  96. GRB 160625B: Global MASTER-Net prompt optical emission detection
  97. GRB 160625B: SAO RAS optical observations
  98. GRB 160625B: TSHAO optical observations
  99. GRB 160625B: Mini-MegaTORTORA detection of bright optical flash simultaneous with LAT event
  100. GRB 160625B: RATIR Optical and NIR 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