The Zwicky Transient Facility Catalog of Periodic Variable Stars

<p>The number of known periodic variables has grown rapidly in recent years. Thanks to its large field of view and faint limiting magnitude, the Zwicky Transient Facility (ZTF) offers a unique opportunity to detect variable stars in the northern sky. Here, we exploit ZTF Data Release 2 (DR2) to search for and classify variables down tor&nbsp;&sim;&nbsp;20.6 mag. We classify 781,602 periodic variables into 11 main types using an improved classification method. Comparison with previously published catalogs shows that 621,702 objects (79.5%) are newly discovered or newly classified, including&nbsp;&sim;700 Cepheids,&nbsp;&sim;5000 RR Lyrae stars,&nbsp;&sim;15,000&nbsp;&delta;&nbsp;Scuti variables,&nbsp;&sim;350,000 eclipsing binaries,&sim;100,000 long-period variables, and about 150,000 rotational variables. The typical misclassification rate and period accuracy are on the order of 2% and 99%, respectively. 74% of our variables are located at Galactic latitudes,&nbsp;|b|&nbsp;&lt;&nbsp;10◦. This large sample of Cepheids, RR Lyrae,&nbsp;&delta;&nbsp;Scuti stars, and contact (EW-type) eclipsing binaries is helpful to investigate the Galaxy&rsquo;s disk structure and evolution with an improved completeness, areal coverage, and age resolution. Specifically, the northern warp and the disk&rsquo;s edge at distances of 15&ndash;20 kpc are significantly better covered than previously. Among rotational variables, RS Canum Venaticorum and BY Draconis-type variables can be separated easily. Our knowledge of stellar chromospheric activity would benefit greatly from a statistical analysis of these types of variables.</p> <p>These supplementary materials contain g and r bands single-exposure photometry for 781,602 periodic variables in Table 2 of the paper.&nbsp;</p> <p><br> SourceID is the internal source identifier&nbsp;joins&nbsp;these attachments to Table 2. Example: For variable star ZTFJ000000.19+320847.2 in Table 2, the SourceID=3 is adopted to search corresponding single-exposure information in both &#39;ztf2g&#39; and &#39;&#39;ztf2r&#39;. &nbsp;</p> <p>File Description:</p> <p>ztf2g &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; g band single exposure photometry data of variables from ZTF2.</p> <p>SourceID,&nbsp;RAdeg,&nbsp;DEdeg, HJD,&nbsp;gmag, e_gmag, g_flag</p> <p>ztf2r &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; r band single exposure photometry data of variables from ZTF2.</p> <p>SourceID,&nbsp;RAdeg,&nbsp;DEdeg, HJD, rmag, e_rmag, r_flag</p> <p>Table2 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;ZTF Variables Catalog.</p> <p>Table6 &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ZTF Suspected Variables Catalog.</p>