The following files may be used for spectral (e.g., Xspec)
simulations as explained below.

Normalized XRISM response matrix (RMF) files including only the
gaussian core of the line spread function (LSF). Pairs of responses
are provided for "high", h7ev ("medium", m8ev) resolution grade with
7eV (8eV) FWHM LSF.

 resolve_h7ev_2019a.rmf
 resolve_m8ev_2019a.rmf

XRISM effective area (ARF) files that include the quantum efficiency
and the optical blocking filter transmission of the Hitomi SXS
detector. The ARFs range over energies 0.11-25 keV.
The filename descriptors "pnt" refer to point-like sources.

 resolve_pnt_spec_noGV_20190611.arf      

XRISM (XARM) non X-ray background (NXB) file.

New high statistics Non X-ray background spectra, likewise convolved
with LSFs of 7 and 8 eV for use with the corresponding RMF, are
based on Hitomi pre-launch estimates with the addition of MnK-alpha
and K-beta features with fluxes estimated by the instrument
team. These are consistent with in-flight Hitomi SXS NXB spectra
derived using the "sxsnxbgen' ftool. The Resolve NXB, at ~0.01 ct/s
over the Resolve array, is negligible in most cases of interest.

 resolve_h7ev_2019a_rslnxb.pha         -- use with resolve_h7ev_2019a.rmf
 resolve_m8ev_2019a_rslnxb.pha         -- use with resolve_m8ev_2019a.rmf

XTEND (SXI) Files

The following Hitomi (Astro-H) pre-launch (ARF, RMF, and background
spectrum) files are provided to be used for Xtend spectral
simulations:

ah_sxi_20120702.rmf
sxt-i_140505_ts02um_int01.8r.arf
ah_sxi_pch_nxb_r1p80_20110530.pi

Note that these are based on a 1.8 arcminute radius circular
extraction region.