+++++++++++++++++++++++++++++++++++++ SNANA quantities for Roman-Rubin sims +++++++++++++++++++++++++++++++++++++ Data are partitioned by (nside=32, ring ordering) healpixel. For each pixel there is a so-called "main file" in parquet format, containing static quantities associated with each source, and an hdf5 file for quantities which vary with time or wavelength or both. SNANA main file ---------------- ======================== ============ ========== ========================== Name Datatype Units Description ======================== ============ ========== ========================== id int64 N/A Unique object identifier ra double degrees Object right ascension dec double degrees Object declination host_id int64 N/A Host galaxy gentype int32 N/A Type of object simulated model_name string N/A Type name start_mjd float days Earliest visibility end_mjd float days Latest visibility z_CMB float N/A redshift mw_EBV float N/A MW extinction parameter mw_extinction_applied boolean N/A Here always False AV float N/A For host galaxy, randomly assigned RV float N/A For host galaxy v_pec float km/sec Peculiar velocity. Not yet simulated so zero. host_ra double degrees Host galaxy RA host_dec double degrees Host galaxy decl. host_mag_g float N/A Host mag. in Rubin g-band host_mag_i float N/A Host mag. in Rubin i-band host_mag_F float N/A Host mag. in Roman F-band host_sn_sep float arcsec Separation from host peak_mjd float days Time of peak flux (model-dependent) peak_mag_g float N/A g-band mag. at peak peak_mag_i float N/A i-band mag. at peak peak_mag_F float N/A F-band mag. at peak lens_dmu_applied boolean N/A False (distance modulus lensing shift not applied) model_param_names list(string) N/A Model parameter names model_param_values list(string) N/A Model parameter values MW_av float N/A MW extinction parameter MW_rv float N/A MW extinction parameter ======================== ============ ========== ========================== SNANA varying quantities ------------------------ The top-level keys for each file are the ids for sources in that pixel, the same as the ids appearing in the parquet file but here stored as strings. Under each id are the following keys ============= =============== ================ =============================== Name Datatype Units Description ============= =============== ================ =============================== mjd float array days Time axis for flambda lambda double array angstroms Wavelength axis for flambda flambda float 2-d array erg/sec/A/cm^2 Flux indexed by (mjd,lambda) mag_ float array N/A Magnitude for each mjd computed using 5 angstrom bins. magcor_ float array N/A Correction to magnitude computed using flambda synmag_ float array N/A Magnitude computed from flambda ============= =============== ================ =============================== where takes on values u, g, r, i, z, y (Rubin bandpasses) and F, H, J, K, R, W, Y, Z (for Roman). mjd values have uniform spacing of 1 day. lambda values have uniform spacing of 100 angstroms. synmag + magcor = mag