The file named M33_Cepheid.cat contains data on Cepheids used in the Tsang et al. paper on Cepheids in M33. The initial catalog of Cepheid is from Hartman et al. (2006, MNRAS, 371, 1405). Some Cepheids found by Pellerin & Macri (2011, ApJ, 193, 26) have been added to that catalog. Details of the work describing the final catalog and the magnitude calibrations are in the paper by Tsang et al 2022.

The file contains only numbers.  The data are arranged in 9 columns and 1936 rows, one row per Cepheid.

Each row contains:
Column 1: right ascension (J2000.0)
Column 2: declination (J2000.0)
Column 3: r magnitude
Column 4: error on r magnitude
Column 5: g-r color
Column 6: error on g-r color
Column 7: r-i color
Column 8: error on g-r color
Column 9: Period (days)

There is no restriction on the use of the data contained in this file. If you find the data useful, please cite Tsang et al 2022, MNRAS, XXX, XXX.