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Air2vac correction for XShooter standards #1633

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merged 3 commits into from
Jul 28, 2023
Merged

Air2vac correction for XShooter standards #1633

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8a250aa
air2vac correction for xshooter standard files
Jul 16, 2023
8af4c6a
readme edit
Jul 20, 2023
1c0944f
Merge branch 'develop' into xsh_std_waves
rcooke-ast Jul 21, 2023
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3 changes: 3 additions & 0 deletions pypeit/core/flux_calib.py
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Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,7 @@
from pypeit.wavemodel import conv2res
from pypeit.core.wavecal import wvutils
from pypeit.core import fitting
from pypeit.core import wave
from pypeit import data


Expand Down Expand Up @@ -199,6 +200,8 @@ def find_standard_file(ra, dec, toler=20.*units.arcmin, check=False):
std_dict['wave'] = std_spec['col1'] * units.AA
std_dict['flux'] = std_spec['col2'] / PYPEIT_FLUX_SCALE * \
units.erg / units.s / units.cm ** 2 / units.AA
# Xshooter standard files use air wavelengths, convert them to vacuum
std_dict['wave'] = wave.airtovac(std_dict['wave'])
elif sset == 'calspec':
std_dict['std_source'] = sset
std_spec = io.fits_open(fil)[1].data
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1 change: 1 addition & 0 deletions pypeit/data/standards/xshooter/xshooter_info.txt
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Expand Up @@ -10,6 +10,7 @@
#The flux distribution over the full X-shooter range 3000 – 25000A is tabulated.
#The fluxes are sampled (at 0.1A [< 1000A] and 0.2A [>10000A]).
#The flux tabluations are in units of (ergs cm-2 s-1 A-1).
#NOTE: The wavelengths are in air, as output by the ESO pipeline.
#http://www.eso.org/sci/observing/tools/standards/spectra/Xshooterspec.html
File Name RA_2000 DEC_2000 V_MAG TYPE
fGD71.dat GD71 05:52:27.61 +15:53:13.8 13.03 DA1
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