Catalog and statistical examinations of Ly{alpha} solar flares from GOES/EUVS-E measurements. (2021)
Keywords :
Astrostatistics distributions ; Solar flares ; Solar ultraviolet emission ; Algorithms
Abstract:The Lyman-alpha (Ly{alpha}) line of neutral hydrogen at 121.6nm is by far the brightest emission line in the vacuum ultraviolet spectral range of the Sun. The emission at this line could be a major energy input to the upper layers of the Earth's atmosphere, strongly impacting the geospace environment. The Geostationary Operational Environmental Satellite (GOES) series, starting with GOES-13, began to carry a multichannel Extreme UltraViolet Sensor (EUVS) with one channel (E-channel) targeting the Ly{alpha} line. In the present work, we produce a Ly{alpha} flare catalog from the GOES-15/EUVS-E data between 2010 April 8 and 2016 June 6 with an automatic flare detection algorithm. This algorithm is designed to search events at various
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The Geostationary Operational Environmental Satellite (GOES) series of
spacecraft, starting with GOES-1, have been observing the Sun nearly
uninterruptedly in two broadband SXR channels (0.5-4{AA} and 1-8{AA})
via their X-ray Sensor instruments since their first launch in 1975.
In addition to the X-ray sensor, since the launch of GOES-13 in 2006,
the GOES series of spacecraft have started to carry a multichannel
Extreme Ultraviolet Sensor (EUVS), dedicated to measuring the full-Sun
extreme ultraviolet (EUV) emission in five channels (A, B, C, D, and
E) between 50 and 1270{AA}. The E-channel (1180-1270{AA}) is dominated
by the Ly{alpha} line at 1216{AA}.
In this paper, we analyzed the Ly{alpha} observations from 2010 April 8
to 2016 June 6 by GOES-15/EUVS-E.
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