diff options
Diffstat (limited to 'scripts/cosmo_calc.py')
| -rwxr-xr-x | scripts/cosmo_calc.py | 146 |
1 files changed, 94 insertions, 52 deletions
diff --git a/scripts/cosmo_calc.py b/scripts/cosmo_calc.py index 8650d2a..1302bdb 100755 --- a/scripts/cosmo_calc.py +++ b/scripts/cosmo_calc.py @@ -7,12 +7,72 @@ Cosmology calculator with support of Chandra ACIS-specific quantities. """ +import sys import argparse +from collections import OrderedDict from _context import acispy from acispy.cosmo import Calculator +# Supported quantities +QUANTITIES = OrderedDict([ + ("luminosity_distance", { + "unit": "Mpc", + "label": "Luminosity distance", + "kwargs": ["z", "unit"], + }), + ("angular_diameter_distance", { + "unit": "Mpc", + "label": "Angular diameter distance", + "kwargs": ["z", "unit"], + }), + ("kpc_per_arcsec", { + "unit": None, + "label": "kpc/arcsec (DA)", + "kwargs": ["z"], + }), + ("kpc_per_pix", { + "unit": None, + "label": "kpc/pix (DA)", + "kwargs": ["z"], + }), + ("cm_per_pix", { + "unit": None, + "label": "cm/pix (DA)", + "kwargs": ["z"], + }), + ("norm_apec", { + "unit": "cm^-5", + "label": "norm (APEC)", + "kwargs": ["z"], + }), +]) + + +def get_quantities(args): + # convert ``argparse.Namespace`` to a dictionary + args = vars(args) + q_all = list(QUANTITIES.keys()) + q_active = [q for q in q_all if args[q]] + if len(q_active) == 0: + q_active = q_all + return q_active + + +def calc_quantity(q, calculator, args): + args = vars(args) + kwargs = {arg: args[arg] for arg in QUANTITIES[q]["kwargs"] + if args[arg] is not None} + value = getattr(calculator, q)(**kwargs) + label = QUANTITIES[q]["label"] + unit = args["unit"] if args["unit"] is not None else QUANTITIES[q]["unit"] + if args["brief"]: + print(value) + else: + print("%s: %s # [%s]" % (label, value, unit)) + + def main(): parser = argparse.ArgumentParser( description="Cosmology calculator with Chandra-specific quantities") @@ -27,64 +87,46 @@ def main(): help="be brief") parser.add_argument("-U", "--unit", dest="unit", help="unit for output quantity if supported") - group = parser.add_mutually_exclusive_group(required=True) - group.add_argument("-L", "--luminosity-distance", - dest="luminosity_distance", - action="store_true", - help="calculate the luminosity distance (DL)") - group.add_argument("-A", "--angular-diameter-distance", - dest="angular_diameter_distance", - action="store_true", - help="calculate the angular diameter distance (DA)") - group.add_argument("--kpc-per-arcsec", dest="kpc_per_arcsec", - action="store_true", - help="calculate the transversal length [kpc] " + - "w.r.t. 1 arcsec at DA(z)") - group.add_argument("--kpc-per-pix", dest="kpc_per_pix", - action="store_true", - help="calculate the transversal length [kpc] " + - "w.r.t. 1 ACIS pixel (0.492 arcsec) at DA(z)") - group.add_argument("--cm-per-pix", dest="cm_per_pix", - action="store_true", - help="calculate the transversal length [cm] " + - "w.r.t. 1 ACIS pixel (0.492 arcsec) at DA(z)") - group.add_argument("--norm-apec", dest="norm_apec", - action="store_true", - help="calculate the normalization factor " + - "of the XSPEC APEC model assuming EM=1") + parser.add_argument("-L", "--luminosity-distance", + dest="luminosity_distance", + action="store_true", + help="calculate the luminosity distance (DL)") + parser.add_argument("-A", "--angular-diameter-distance", + dest="angular_diameter_distance", + action="store_true", + help="calculate the angular diameter distance (DA)") + parser.add_argument("--kpc-per-arcsec", dest="kpc_per_arcsec", + action="store_true", + help="calculate the transversal length [kpc] " + + "w.r.t. 1 arcsec at DA(z)") + parser.add_argument("--kpc-per-pix", dest="kpc_per_pix", + action="store_true", + help="calculate the transversal length [kpc] " + + "w.r.t. 1 ACIS pixel (0.492 arcsec) at DA(z)") + parser.add_argument("--cm-per-pix", dest="cm_per_pix", + action="store_true", + help="calculate the transversal length [cm] " + + "w.r.t. 1 ACIS pixel (0.492 arcsec) at DA(z)") + parser.add_argument("--norm-apec", dest="norm_apec", + action="store_true", + help="calculate the normalization factor " + + "of the XSPEC APEC model assuming EM=1") parser.add_argument("z", type=float, help="redshift") args = parser.parse_args() cosmocalc = Calculator(H0=args.H0, Om0=args.Om0) - if args.luminosity_distance: - kwargs = {"z": args.z} - kwargs["unit"] = args.unit if args.unit else "Mpc" - label = "Luminosity distance [%s]" % kwargs["unit"] - value = cosmocalc.luminosity_distance(**kwargs) - elif args.angular_diameter_distance: - kwargs = {"z": args.z} - kwargs["unit"] = args.unit if args.unit else "Mpc" - label = "Angular diameter distance [%s]" % kwargs["unit"] - value = cosmocalc.angular_diameter_distance(**kwargs) - elif args.kpc_per_arcsec: - label = "kpc/arcsec (DA)" - value = cosmocalc.kpc_per_arcsec(args.z) - elif args.kpc_per_pix: - label = "kpc/pix (DA)" - value = cosmocalc.kpc_per_pix(args.z) - elif args.cm_per_pix: - label = "cm/pix (DA)" - value = cosmocalc.cm_per_pix(args.z) - elif args.norm_apec: - label = "norm (APEC) [cm^-5]" - value = cosmocalc.norm_apec(args.z) - else: - raise ValueError("no quantity to calculate") + q_active = get_quantities(args) + if len(q_active) > 1: + if args.unit is not None: + args.unit = None + print("WARNING: ignored argument --unit", file=sys.stderr) + if args.brief: + args.brief = False + print("WARNING: ignored argument --brief", file=sys.stderr) - if not args.brief: - print(label + ": ", end="", flush=True) - print(value) + for q in q_active: + calc_quantity(q=q, calculator=cosmocalc, args=args) if __name__ == "__main__": |