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これは日々の作業を通して学んだことや毎日の生活で気づいたことをを記録しておく備忘録である。
HTML ファイル生成日時: 2024/11/21 17:40:55.112 (台灣標準時)
astroplan を使って、ファインディングチャートを作るには以下のようにすれ ばよいようでござる。
#!/usr/pkg/bin/python3.9 # # Time-stamp: <2022/07/03 12:41:30 (CST) daisuke> # # importing argparse module import argparse # importing pathlib module import pathlib # importing sys module import sys # importing astropy module import astropy.units # importing astroplan module import astroplan import astroplan.plots # importing matplotlib module import matplotlib.pyplot # importing ssl module import ssl # allow insecure downloading ssl._create_default_https_context = ssl._create_unverified_context # units unit_arcmin = astropy.units.arcmin # constructing parser object desc = "making a finding chart" parser = argparse.ArgumentParser (description=desc) # adding arguments parser.add_argument ('-t', '--target', default='M1', help='target name') parser.add_argument ('-f', '--fov', type=float, default=15.0, \ help='field-of-view in arcmin (default: 15 arcmin)') parser.add_argument ('-o', '--output', default='chart.png', \ help='output file name (EPS, PDF, PNG, or PS file)') # command-line argument analysis args = parser.parse_args () # input parameters target = args.target fov = args.fov * unit_arcmin file_output = args.output # making pathlib object path_output = pathlib.Path (file_output) if (path_output.exists ()): # printing message print ("ERROR: output file '%s' exists." % file_output) # exit sys.exit () if not ( (path_output.suffix == '.eps') or (path_output.suffix == '.pdf') \ or (path_output.suffix == '.png') or (path_output.suffix == '.ps') ): # printing message print ("ERROR: output file must be either EPS, PDF, PNG, or PS.") # exit sys.exit () # target obj = astroplan.FixedTarget.from_name (target) # image ax, hdu = astroplan.plots.plot_finder_image (obj, fov_radius=fov) # saving the image to file matplotlib.pyplot.savefig (file_output, dpi=225)
実行してみると、以下のようになるでござる。
% ./astroplan_sample_16.py -h usage: astroplan_sample_16.py [-h] [-t TARGET] [-f FOV] [-o OUTPUT] making a finding chart optional arguments: -h, --help show this help message and exit -t TARGET, --target TARGET target name -f FOV, --fov FOV field-of-view in arcmin (default: 15 arcmin) -o OUTPUT, --output OUTPUT output file name (EPS, PDF, PNG, or PS file) % ./astroplan_sample_16.py -t M1 -o m1.png Downloading https://skyview.gsfc.nasa.gov/tempspace/fits/skv11085880335151.fits |==========================================| 374k/374k (100.00%) 1s QStandardPaths: XDG_RUNTIME_DIR not set, defaulting to '/tmp/runtime-daisuke' % ls -lF *.png -rw-r--r-- 1 daisuke taiwan 174496 Jul 3 12:27 airmass_20220703.png -rw-r--r-- 1 daisuke taiwan 127678 Jul 3 12:39 m1.png -rw-r--r-- 1 daisuke taiwan 175140 Jul 3 12:33 sky_20220703.png % feh -dF m1.png
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