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Table 1.

Instruments in use.

Mission Instrument Energy range (keV) References #
HEAO1 A2 2–60 [1] 5
Einstein IPC 0.4–4 [2] 4
SSS 0.5–4.5 4
EXOSAT ME 1–50 [3] 8
ROSAT PSPC 0.08–2.9 [4] 2
HRI 0.1–2.4 9
Ginga LAC 1.5–37 [5] 3
ASCA SIS0,1 0.3–12 [6] 2
GIS2,3 0.4–12 2
RXTE PCA 1.4–100 [7] 17
BeppoSAX LECS 0.1–14 [8] 1
MECS 0.8–12 1
XMM-Newton EPIC PN 0.1–12 [9] 8
MOS1 0.1–12 1
Chandra HETG,ACIS-S 0.4–8 [10] 2
Swift XRT 0.2–10 [11] 9
MAXI GSC 2–20 [12] 4
SSC 0.7–7 4

Notes. The last column shows the total number of spectra analyzed in this work. For some instruments spectra from multi-instrument missions were fitted simultaneously (see Sect. 3.1).

Instrument references. Rothschild et al. (1979) [1]; Giacconi et al. (1979) [2]; Taylor et al. (1981) [3]; Truemper (1982) [4]; Turner et al. (1989) [5]; Tanaka et al. (1994) [6]; Jahoda et al. (1996) [7]; Boella et al. (1997) [8]; Jansen et al. (2001) [9]; Weisskopf et al. (2002), Canizares et al. (2005) [10]; Gehrels et al. (2004) [11]; Matsuoka et al. (2009) [12].

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