Quantities for TRILEGAL stars version lsst_sim.simdr2
These data are sourced from the [Astro Data Lab database](https://datalab.noirlab.edu/), in particular from the lsst_sim.simdr2 catalog.
Data are partitioned by (nside=32, ring ordering) healpixel. For each pixel there is a so-called “main file” (with information largely coming from the source catalog) and a flux file. The latter contains for each object only fluxes for lsst bands and the object id so it can be joined with the main file. Both are parquet files.
TRILEGAL main file
This file contains a subset of the columns in the source table. It also has an id column. The ids are unique across the catalog (the source catalog has no similar column). For a complete description of all columns in the source catalog go to https://datalab.noirlab.edu/data-explorer?showTable=lsst_sim.simdr2
Name (Data Lab name) |
Datatype |
Description |
|---|---|---|
id |
string |
Unique object identifier |
ra |
double |
Right Ascension J2000 (deg) |
dec |
double |
Declination J2000 (deg) |
av |
double |
V-band Extinction |
pmdec |
float |
Proper motion in dec |
pmracosd |
float |
Proper motion in RA*cos(Dec) |
vrad |
float |
Radial velocity |
mu0 |
float |
True distance modulus |
evol_label (label) |
int |
Evolutionary phase |
logT (logte) |
float |
log(effective temperature) (deg K) |
logg |
float |
log(surface gravity) (cgs) |
logL (logl) |
float |
log(luminosity) (L_sun) |
Z (z) |
float |
Linear heavy element abundance |
umag |
float |
LSST u-band magnitude |
gmag |
float |
LSST g-band magnitude |
rmag |
float |
LSST r-band magnitude |
imag |
float |
LSST i-band magnitude |
zmag |
float |
LSST z-band magnitude |
ymag |
float |
LSST y-band magnitude |
TRILEGAL flux file
Fluxes were calculated using the quantities from the main file and LSST throughputs_2023_09_07.
Name |
Datatype |
Units |
Description |
|---|---|---|---|
id |
string |
N/A |
Unique object identifier |
lsst_flux_u |
float |
photons/sec/cm^2 |
Flux integrated over lsst u-band |
lsst_flux_g |
float |
photons/sec/cm^2 |
Flux integrated over lsst g-band |
lsst_flux_r |
float |
photons/sec/cm^2 |
Flux integrated over lsst r-band |
lsst_flux_i |
float |
photons/sec/cm^2 |
Flux integrated over lsst i-band |
lsst_flux_z |
float |
photons/sec/cm^2 |
Flux integrated over lsst z-band |
lsst_flux_y |
float |
photons/sec/cm^2 |
Flux integrated over lsst y-band |