masktools

Utilities for designing DEIMOS slitmasks

Website: https://github.com/adwasser/masktools

Required packages

numpy (tested on 1.11.0)
astropy (tested on 1.1.1)
matplotlib (tested on 1.5.0)
astroquery (tested on 0.3.1)

masktools.superskims

This package is for creating distributions of SKiMS (Stellar Kinematics with Multiple Slits) which optimally sample the integrated stellar light of a galaxy.

Authors: Nicola Pastorello and Asher Wasserman

This packages installs the superskims script, which creates dsim input files for a given galaxy.

usage: superskims [-h] [-m MU_EFF] [-r RA] [-d DEC] [-q] name R_eff axial_ratio position_angle num_masks

This script generates dsim input files from the inputted galaxy parameters

positional arguments: name Name of galaxy for output and NED lookup R_eff Effective radius of galaxy in arcseconds axial_ratio Ratio of minor axis to major axis position_angle In degrees counter-clockwise from North num_masks Number of masks for the galaxy

optional arguments: -h, --help show this help message and exit -m MU_EFF, --mu_eff MU_EFF Effective surface brightness in mag/arcsec^2, default is 22 -r RA, --ra RA Right ascension, in degrees J2000. If name is findable by NED, will use that one instead. -d DEC, --dec DEC Declination, in degrees J2000. If name is findable by NED, will use that one instead. -q, --quiet If toggled, suppress console output.

For more fine-grained control, you can access the Mask and Galaxy classes through the masktools.superskims package while within a python environment, e.g.,::

from masktools import superskims
from astropy.coordinates import SkyCoord
center = SkyCoord('12h35m37.9s +12d15m50s')
galaxy = superskims.Galaxy(name='N4551', center=center, r_eff=16.6, 
                           axial_ratio=0.75, position_angle=70.5)
galaxy.optimize(num_masks=4)
for mask in galaxy.masks:
    output_file = mask.name + '_PA{:0.1f}_superskims.dsim'.format(mask.mask_pa)
    superskims.outputs.save_to_dsim(mask, galaxy.center, output_file)

masktools.stars

This package is for obtaining good guide stars and align stars for a mask. Work in progress. The get_table method in the query_usno model is likely to be reorganized at some point.