ASTRO-H response files for spectral simulation

Notes

The flat sky ARFs are normalized so that the fitting results are provided in units of [photons s^-1 cm^-2 deg^-2] or [erg s^-1 cm^-2 deg^-2].
Two sets of ARF and BGD files, one for a point source and the other for a diffuse target, are prepared.
For the RMF of SXS, files corresponding to the "baseline" design and other optional designs are prepared.
In case of HXI, users can select either "top layer only" or "all layers", according to the target.
Effective area of HXT (ARF) corresponds to one mirror, while there are two HXTs on board ASTRO-H.
Although the vignetting effect of XRT is energy dependent, the current flat-sky ARFs are simply corrected by the calculated value at 1 or 7 keV.
There are two data selection modes for SGD; "photo-absorption mode" and "Compton mode". The current release is only for the later one.

SXT-S+SXS (X-ray micro-calorimeter)

Updates from 2009 to 2010.
- Detector array size (8x8 to 6x6)
- Thermal shield (0.5 um PET to 0.2 um Polyimide)
- ASTRO-H mirror housing structure used
- Be 25um, Be 50um, and Optical Filter version available
ARF (all pixels, point source)
- open filter: sxt-s_100208_ts02um_intallpxl.arf.gz
- optical blocking filter: sxt-s_100208_ts02um_of_intallpxl.arf.gz
- 25μm Be filter: sxt-s_100208_ts02um_Be25um_intallpxl.arf.gz
- 50μm Be filter: sxt-s_100208_ts02um_Be50um_intallpxl.arf.gz
ARF (all pixels, flat sky over 2x2 deg², vignetting effect at 1 keV taken into account)
- open filter: sxt-s_100208_ts02um_flatsky-vig1kev_intallpxl.arf.gz
- optical blocking filter: sxt-s_100208_ts02um_of_flatsky-vig1kev_intallpxl.arf.gz
- 25μm Be filter: sxt-s_100208_ts02um_Be25um_flatsky-vig1kev_intallpxl.arf.gz
- 50μm Be filter: sxt-s_100208_ts02um_Be50um_flatsky-vig1kev_intallpxl.arf.gz
ARF (all pixels, flat sky over 2x2 deg², vignetting effect at 7 keV taken into account)
- open filter: sxt-s_100208_ts02um_flatsky-vig7kev_intallpxl.arf.gz
- optical blocking filter: sxt-s_100208_ts02um_of_flatsky-vig7kev_intallpxl.arf.gz
- 25μm Be filter: sxt-s_100208_ts02um_Be25um_flatsky-vig7kev_intallpxl.arf.gz
- 50μm Be filter: sxt-s_100208_ts02um_Be50um_flatsky-vig7kev_intallpxl.arf.gz
RMF (Energy coverage: 0.0001-16.384 keV, 1.0 eV pitch)
- ah_sxs_7ev_basefilt_20090216.rmf.gz (This is the baseline design.)
  SXS energy response. Energy resolution (FWHM): 7eV constant, w/ baseline filters.
- ah_sxs_5ev_basefilt_20100712.rmf.gz
  SXS energy response. Energy resolution (FWHM): 5eV constant, w/ baseline filters. The current best estimate.
- ah_sxs_4ev_basefilt_20090216.rmf.gz
  SXS energy response. Energy resolution (FWHM): 4eV constant, w/ baseline filters.
- ah_sxs_7ev_thinfilt_20090216.rmf.gz
  SXS energy response. Energy resolution (FWHM): 7eV constant, w/ thin filters.
- ah_sxs_4ev_thinfilt_20090216.rmf.gz
  SXS energy response. Energy resolution (FWHM): 4eV constant, w/ thin filters.
  - "ah_sxs_7ev_basefilt_20090216.rmf" is based on the baseline design parameters and performance. This should be used first.
  - "7 eV" and "4 eV" are the requirement and the goal for the energy resolution. This is not a choice, but to consider how much effort to put into resolution improvement relative to investments in schedule margin or risk reduction elsewhere, it is useful to have an idea of the science improvements and observing time reductions enabled by the higher resolution.
  - The baseline filter set is based on the XRS filters, and hence is the baseline design. If we can use a thin filter set, it improves low energy efficiency significantly, but also increases risks. Comparison of these two filter sets from the scientific point of view is very useful for the trade-off study.
Background files for the whole 36 pixel array to use with XSPEC:
- sxs-bck_20100219.fits
  Detector background.
- sxs-cxb_20100219.fits
  Cosmic X-ray background.
- sxs_bkg_instruction.txt
  Instruction to use the background file.
- Background.jpg
  Plot of background.

SXT-I+SXI (X-ray CCD)

Updates from 2009 to 2010.
- Thermal shield (0.5 um PET to 0.2 um Polyimide)
- ASTRO-H mirror housing structure used
ARF (on-axis r<1.8', point source)
- sxt-i_100208_ts02um_int01.8r.arf.gz
  SXT point-like source response file for SXI at on-axis generated with a r<1.8 arcmin integration region.
ARF (7' off-axis r<1.8', point source)
- ah_sxti_pnt_r1p80_offset7_20090304.arf.gz
  SXT point-like source response file for SXI at 7' off-axis generated with a r<1.8 arcmin integration region.
ARF (15' off-axis r<1.8', point source)
- ah_sxti_pnt_r1p80_offset15_20090304.arf.gz
  SXT point-like source response file for SXI at 15' off-axis generated with a r<1.8 arcmin integration region.
ARF (36'x36', flat sky)
- sxt-i_100208_ts02um_flatsky-vig1kev_int36x36arcmin.arf.gz
  SXT flat sky (2x2 deg²) response file for SXI generated with a 36x36 arcmin² integration region and vignetting effect at 1 keV taken into account.
- sxt-i_100208_ts02um_flatsky-vig7kev_int36x36arcmin.arf.gz
  SXT flat sky (2x2 deg²) response file for SXI generated with a 36x36 arcmin² integration region and vignetting effect at 7 keV taken into account.
RMF
- next_sxi_Pch_2010219.rmf.gz
  SXI (P-channel) energy response.
BGD (r<1.8')
- ah_sxi_pch_nxb_r1p80_20090216.pi.gz
  SXI non X-ray background model for the integration region of r<1.8 arcmin.
BGD (36'x36')
- ah_sxi_pch_nxb_full_20090216.pi.gz
  SXI non X-ray background model for the full field of view of 36x36 arcmin².

HXT+HXI (Hard X-ray Imager)

Arf is for one mirror

ARF (r<1.8 arcmin, point source)
- ah_hxt_pnt_r1p80_20090217.arf.gz
  HXT point-like source response file generated with a r<1.8 arcmin integration region.
ARF (8.6x8.6 arcmin², flat sky)
- ah_hxt_flat_vig30_20090217.arf.gz
  HXT flat sky (2x2 deg²) response file generated with a 8.6x8.6 arcmin² integration region and vignetting effect at 30 keV taken into account.

"Top layer only" configuration

RMF
- ah_hxi_1dssd_20090217.rmf.gz
  RMF for top-layer only, suited for dark sources at 5-20 keV
BGD (r<1.8')
- ah_hxi_1dssd_nxb_r6p3mm.pha
BGD (8.6x8.6arcmin)
- ah_hxi_1dssd_nxb_30x30mm2.pha

"All layers" configuration

RMF
- ah_hxi_20090217.rmf.gz
  RMF for all (4 Si-layers +CdTe), suited for bright sources (5-70 keV) and dark sources at 20-70 keV.
BGD (r<1.8')
- ah_hxi_nxb_r6p3mm.pha
BGD (8.6x8.6arcmin)
- ah_hxi_nxb_30x30mm2.pha

SGD (Soft Gamma-ray Detector)

Last update: 2010-02-21