SpecPro is an interactive IDL program developed by
Dan Masters of Caltech to help analyze of DEIMOS spectra of
galaxies in the COSMOS survey field. The interface provides a comprehensive
picture of a spectroscopic target by displaying the 1D and 2D
spectrum as well as available multiwavelength stamp images and
overall source SED. Even without multiwavelength survey data,
SpecPro is a useful tool for viewing spectra and
rapidly finding redshifts. While originally written specifically
for DEIMOS, the authors have since generalized the program so
that it can be used to view data from any instrument.
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The SpecPro interface displaying a star-forming
galaxy at redshift z=0.89. Stamp images of the
source are displayed on the left side of the interface,
and the 1D spectrum is displayed in the upper right
window. On the 1D plot, vertical lines mark the
positions of prominent emission features, and a spectral
template is overlaid in blue. Under the 1D spectrum is
the 2D spectrum, binned to fit the display. Emission
lines ([O II], Hβ, Hγ, [O III]) are
easily visible in the binned 2D image. The window on
the bottom right shows the SED of the source from the
ultraviolet to the mid-infrared. The observed-frame
positions of important photometric breaks are indicated
with vertical dashed lines. |
The interface adapts routines from the DEIMOS DEEP2
pipeline for rapid redshift determination by automated
cross-correlation against a variety of galaxy spectral
templates. It also allows the user to overlay common emission
and absorption lines on both the 1D and 2D spectrum, change the
redshift manually, bin, smooth and zoom on the 1D spectrum,
automatically re-extract 1D spectra from 2D, save results to
file from within the interface, and overlay the slit on the
stamp images, among other capabilities.
The program is publicly available at http://specpro.caltech.edu
and is available from DEIMOS accounts at Keck.
Converting DEIMOS Data to SpecPro Format
DEIMOS2 Data need to be converted into the SpecPro Format before
being loaded into SpecPro. The IDL procedure
convert_deimos_to_specpro.pro performs this operation. The input
data are the spec1d file and the two R and B slit files.
For example:
convert_deimos_to_specpro, "spec1d.m30.000.M30.fits", "slit.m30.000B.fits","slit.m30.000R.fits"
Optionally, the output file names can be specified:
convert_deimos_to_specpro, "spec1d.m30.000.M30.fits", "slit.m30.000B.fits", "slit.m30.000R.fits", out1dname="spec1d.mymask.000.M30.fits", out2dname="spec2d.mymask.000.M30.fits"
Note that the output files need to follow the naming convention
of the DEEP2 pipeline
(spec1d.maskname.???.object.fits).
Launching SpecPro
Launch SpecPro from any HQ machine by typing
specpro
to launch the package in regular format or
specpro -small
to launch it in the more compact display format.
Loading spectra in SpecPro
At the IDL prompt:
specpro, 6
will load any spec1d file with a 006 in its name (the
sixth slit). If multiple possibilities exist, a window will
popup allowing the user to chose the right one. If you are using
a small display and the SpecPro window is too large, you can
use:
specpro, 6, /small
See Also