++++++++++++++++++++++++++++++++++++++++++ Star quantities for ops-rehearsals 3 and 4 ++++++++++++++++++++++++++++++++++++++++++ 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 UW star 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. Star main file ---------------- Note the same schema may be used for SNe. Some fields are unused for stars. ======================== ============ ========== ========================= Name Datatype Units Description ======================== ============ ========== ========================= object_type string N/A In practice always 'star' id string N/A Unique object identifier ra double degrees Object right ascension dec double degrees Object declination host_galaxy_id int64 N/A Unused for stars magnorm double N/A To be applied to SED sed_filepath string N/A Path to object's SED file relative to env variable SIMS_SED_LIBRARY_DIR MW_rv float N/A Extinction parameter MW_av float N/A Extinction parameter from F19 dust map mura double milarcsec RA proper motion per year mudec double milarcsec Declin. proper motion per year radial_velocity double km/sec Radial velocity parallax double milarcsec Parallax variability_model string N/A Unused for stars salt2_params int32 N/A Unused for stars is_variable boolean N/A If true, the star has sinusoidal variability in magnitude period double days period of variability mag_amplitude double N/A amplitude of magnitude variability phase double radians phase of variability ======================== ============ ========== ========================= Star flux file ---------------- ============= ========= ================ ================================ 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 ============= ========= ================ ================================