Near-Infrared Spectral Templates Of L Dwarfs

As described in <em>Meeting the Cool Neighbors XII: An Optically-Anchored Analysis of the Near-Infrared Spectra of L Dwarfs</em> (Cruz et. al.), we have combined the NIR spectra of objects of the same optical spectral type to make NIR spectral average templates for field and low-gravity L dwarfs at each integer spectral type, in the range L0–L8. As more optical and/or NIR data are collected for L dwarfs, the templates could potentially be updated. In anticipation of this, we dub the templates presented here version 1.0. The naming convention of the ascii files is the following: Spectral type + Band + Gravity<br> <br> Gravity can be <br> 'f' (field objects) or <br> 'b' ({beta}-type low-gravity objects) or <br> 'g' ({gamma}-type very low-gravity objects)<br> <br> Example: L1H_f.txt is the template for the H band of the field L1 objects.<br> <br> Columns are:<br> 1. Wavelength in microns<br> 2. Average normalized flux<br> 3. Normalized flux standard deviation<br> 4. Min normalized flux<br> 5. Max normalized flux <br> The last two columns define the range of the strip at each wavelength.<br> <br> The files are formatted according to the machine readable format used by the AAS Journals and CDS/VizieR. The files can be read in python using the astropy package:<br> <br> from astropy.table import Table<br> data = Table.read("L1H_f.dat", format="ascii.cds")