Software Open Access

SPEX X-ray spectral fitting package

Kaastra, J. S.; Raassen, A. J. J.; de Plaa, J.; Gu, Liyi

Researcher(s)
Alkemade, Frans; Bartelds, Gert-Jan; Behar, Ehud; Blustin, Alex; Costantini, Elisa; Duysens, Max; Ebrero, Jacobo; Eggenkamp, Irma; Fludra, Andrzej; Grange, Yan; Gronenschild, Ed; Gunsing, Theo; Hansen, Jorgen; Hartmann, Wouter; van der Heyden, Kurt; Jansen, Fred; Kuiper, Lucien; Lemen, Jim; Liedahl, Duane; Mao, Junjie; Mazzotta, Pasquale; Mehdipour, Missagh; Mewe, Rolf; Nieuwenhuijzen, Hans; van den Oord, Bert; Phillips, Ken; Pinto, Ciro; van der Rijst, Remco; Rogantini, Daniele; Sawada, Makoto; Schrijver, Hans; Schrijver, Karel; Schut, Tiemen; Steenbrugge, Katrien; Sylwester, Janusz; Smeets, Rob; Stil, Jeroen; Urdampilleta, Igone; Verner, Dima; Vink, Jacco; van der Wolf, Frank; Zeegers, Sascha; Zycki, Piotr

SPEX is a software package for fitting astrophysical X-ray spectra. It has been developed since the 1970s at SRON Netherlands Institute for Space Research. SPEX is an interactive command-line program for the computation of emergent spectra of optically thin plasmas such as stellar coronal loop structures, supernova remnants (also including transient ionization effects), photo-ionized plasmas, and optically thick plasmas. These model spectra can be fitted to measured X-ray spectra from various X-ray observatories, like XMM-Newton and Chandra. SPEX has been optimized for high-resolution X-ray spectroscopy, which makes it especially suitable for analyzing grating and micro-calorimeter spectra. 

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