Basic information for NGLS data web site
========================================

This web site contains data, plots, and information for CO J=3-2
observations of the 155 galaxies in the JCMT Nearby Galaxies
Legacy Survey. Further information about the data processing can be
found in Warren et al. (2010), ApJ, 714, 571 and further information
concerning the survey will be found at Wilson et al. (2012, MNRAS,
in prep.).

At the current time the exact parameters of the SCUBA-2 portion of the
NGLS remain to be determined. No SCUBA-2 data are available yet on
this web site and SCUBA-2 observing has not yet begun.

There are two main directories in this web site:

Source_Lists
------------

This directory contains 5 simple text files which list the galaxies
which make up the NGLS sample. The lists are divided into

- Field galaxies (diameters < 4 arcmin)
- Virgo galaxies (diameters < 4 arcmin)
- small SINGS galaxies (diameters < 4 arcmin, SINGS_1.list)
- large SINGS galaxies (SINGS_2_*.list)

There are two files for the SINGS_2 subset as the area to be mapped
may be different with SCUBA-2 than with CO 3-2 (HARP-B). 

Data_and_Plots
--------------

The data from the most recent reduction and calibration can be found in
the directory v2-0. Older versions of the data are also available but
should not be used for new analysis.

The data inside this directory is organized by subsample (Field,
Virgo, SINGS2, SINGS2). There is also a directory "Notes" which
contains some general information on the scripts used to process the
data.

Inside each subsample there is one subdirectory for each galaxy. Each
galaxy subdirectory contains 

Data
Notes
Plots

Data files are available both in fits format and in starlink native
format (*.sdf). Below we use NGC 3627 to describe the type of data
which are available. For more information on the meaning of the sigma
cutoffs, see Warren et al. 2010 and Wilson et al. 2012.

Images
------

NGC3627_sincsinc_totint20_noise_v2-0.fits - integrated intensity map
					    made using a 2 sigma cutoff
NGC3627_sincsinc_totint20_v2-0.fits	  - a first estimate of the
					    noise per pixel in the
					    integrated intensity map
NGC3627_sincsinc_totint25_noise_v2-0.fits - integrated intensity with
					    2.5 sigma cutoff
NGC3627_sincsinc_totint25_v2-0.fits	  - first estimate of noise
					    per pixel
NGC3627_sincsinc_totint30_noise_v2-0.fits - integrated intensity with
					    3 sigma cutoff
NGC3627_sincsinc_totint30_v2-0.fits	  - first estimate of noise
					    per pixel

Note that the integrated intensity maps and their noise maps are in
units of Ta* and should be divided by the main beam efficiency of 0.6
to convert to the more commonly used Tmb units. The noise maps are
preliminary and do not include the uncertainty due to the baseline
subtraction; improved noise maps will be available at some point.

NGC3627_sincsinc_intvel20_v2-0.fits - velocity field (moment 1) map
				      made using a 2 sigma cutoff
NGC3627_sincsinc_intvel25_v2-0.fits - velocity field with 2.5 sigma
NGC3627_sincsinc_intvel30_v2-0.fits - velocity field with 3 sigma

NGC3627_sincsinc_dispvel20_v2-0.fits - velocity dispersion (moment 2) map
				       made using a 2 sigma cutoff
NGC3627_sincsinc_dispvel25_v2-0.fits - velocity dispersion with 2.5 sigma
NGC3627_sincsinc_dispvel30_v2-0.fits - velocity dispersion with 3 sigma


Cubes
-----

NGC3627_sincsinc_20kms_v2-0.fits - final data cube at ~20 km/s resolution

NGC3627_sincsinc_v2-0.fits - final data cube at original resolution
			     (~0.4 km/s)