A Catalog of Suzaku/WAM Hard X-Ray Solar Flares
Yamaoka, Kazutaka; Endo, Akira; Morigami, Kouichi; Sonoda, Eri; Sugita, Satoshi; Suzuki, Masanobu; Tashiro, Makoto S.; Terada, Yukikatsu; Urata, Yuji; Watanabe, Kyoko; Minoshima, Takashi; Shimamori, Atsushi; Sato, Yumi
Japan, Taiwan
Abstract
We developed a catalog of solar flares in the hard X-ray band observed with the Wide-band All-sky Monitor (WAM) onboard the Suzaku satellite between 2005 July and 2009 November. During this period, 105 solar flares (GOES class X: 13, M: 29, C: 47, B: 16) were detected with WAM, including 10% of GOES-class C events reported during the same period. The observed photon flux ranged between 9 × 10-5 and 9 × 10-1 photons s-1 cm-2 keV-2 at 100 keV. The averaged hard X-ray spectrum for each solar flare was evaluated for 70 of the 105 events, and 43 of them were well fitted with a single power-law model with a photon index ranging between -7 and -3. We observed a weak trend where events with longer durations exhibited harder spectral slopes.