price@MacBook:~/pfs/drp_instmodel (tickets/SIM2D-114 %=) $ git sub
commit a548253de2ba62e5389750004dc39a8d7ff4ee5b
Author: Paul Price <price@astro.princeton.edu>
Date:   Thu Apr 25 17:09:52 2019 -0400

    Spectrum: add __mul__
    
    Allows multiplying spectra together.
    This will be used when we multiply a spectrum by the transmission.

 python/pfs/instmodel/spectrum.py | 86 +++++++++++++++++++++++++++++++++++++---
 1 file changed, 81 insertions(+), 5 deletions(-)

commit 16e848474d1f95fd6d1e783c75dbd78b8a238ba2
Author: Paul Price <price@astro.princeton.edu>
Date:   Thu Apr 25 17:19:32 2019 -0400

    SkyModel: refactor and add extinction
    
    Using Spectrum rather than splines (a TableSpectrum is a kind of a spline,
    it's just a different representation). I want to be careful with the
    resolution: can't just multiply tables/splines at different resolution.
    
    This includes a new Arm enum class for standardising how the arm
    is represented (band vs arm).
    
    Extinction data come from the data recently added to drp_instdata,
    provided by Nicholas Mondrik. Note that we now use the second-to-last
    column of the instrument throughput data, which contains the instrument
    only, without the atmosphere.

 python/pfs/instmodel/arm.py        |  34 ++++++
 python/pfs/instmodel/detector.py   |  18 +--
 python/pfs/instmodel/exposure.py   |   6 +-
 python/pfs/instmodel/makeSim.py    |  14 ++-
 python/pfs/instmodel/simImage.py   |  15 +--
 python/pfs/instmodel/sky.py        | 219 ++++++++++++++++++++-----------------
 python/pfs/instmodel/splinedPsf.py |   5 +-
 7 files changed, 187 insertions(+), 124 deletions(-)

commit 08161df473adbf9526b7f30d3cd7f5fe9bd38444
Author: Paul Price <price@astro.princeton.edu>
Date:   Thu Apr 25 17:21:24 2019 -0400

    simplify the command-line interface
    
    Introduces "--type" which replaces --imagetyp" and "--domeClosed".
    Does a bit more checking on the lamps for the various image types.

 bin/makeSimRun                      | 68 ++++++++++++++++++-------------------
 python/pfs/instmodel/lightSource.py |  5 +--
 python/pfs/instmodel/makeSim.py     | 28 ++++++++++-----
 3 files changed, 57 insertions(+), 44 deletions(-)

commit a140af04a91a868b6f0ce91bae32b4f2bef62185
Author: Paul Price <price@astro.princeton.edu>
Date:   Fri Apr 26 13:30:39 2019 -0400

    Remove unnecessary 'examples' symlink

 examples | 1 -
 1 file changed, 1 deletion(-)

commit e5ef8f89e0d623a3d282f750c28039657f70332f
Author: Paul Price <price@astro.princeton.edu>
Date:   Fri Apr 26 13:32:25 2019 -0400

    suppress warnings from pyfits
    
    Floods of warnings like:
    WARNING: VerifyWarning: Keyword name 'W_AIT_SRC_QTH' is greater than 8 characters or contains characters not allowed by the FITS standard; a HIERARCH card will be created. [astropy.io.fits.card]
    
    come from applying the bias header to the output; ignore them.
    
    Also fix the warning about 'clobber' being deprecated by using
    the 'overwrite' kwarg.

 python/pfs/instmodel/exposure.py | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

commit 713a5d5015c25785636d7fc27c33c860f85dcbec (HEAD -> tickets/SIM2D-114, origin/tickets/SIM2D-114)
Author: Paul Price <price@astro.princeton.edu>
Date:   Fri Apr 26 13:45:37 2019 -0400

    add option to apply extinction to the sky spectrum
    
    I'm assuming that the sky spectrum is intended to be used as
    provided, and therefore the default is to not apply extinction.
    But if the spectrum is a model for above the atmosphere, it
    should be extincted.

 python/pfs/instmodel/makeSim.py | 6 ++++--
 python/pfs/instmodel/sky.py     | 8 ++++++--
 2 files changed, 10 insertions(+), 4 deletions(-)

Aerosol: tau=0.0075; a=0, 1, 2.5 (arXiv:1210.2619 Fig 13, Fig 19)