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Cross-matching of ZTF DR3 with variable star catalogues

This project is dedicated to obtain an ML training set of ZTF variable star light curves by cross-matching ZTF DR3 with variable star catalogues. Clickhouse database is used to perform cross-matching, cone search is made by hierarchical hexagonal hash (h3).

Available data-sets

ASAS-SN mean magnitude histogram ASAS-SN observation count histogram ASAS-SN variable types chart

This repo contains a copy of the catalogue dated by 2019-10-20 at /ch_vars/data/asassn-catalog-20191020.csv.bz2. The catalogue is filtered to contain objects with class_probability > 0.9. Cross-matching is performed to find ZTF objects within 1 arcsec from ASAS-SN objects and with difference of mean ZTF g magnitude and ASAS-SN V magnitude not large than ASAS-SN V magnitude amplitude plus unity.

Classified variables:

SDSS variables mean magnitude histogram SDSS variables observation count histogram

Unclassified variables:

SDSS candidates mean magnitude histogram SDSS candidates observation count histogram

Two data-sets obtained by 1 arcsec cross-matching of classified (the first link) and unclassified (the second link) variables found by Waqas Bhatti in SDSS Stripe 82 data. The list of classified variables contain 1162 objects while unclassified list (which is almost a superset of the classified) contains 45 822 objects.

VSX mean magnitude histogram VSX observation count histogram VSX variable types chart

2020-10-05 version of VSX from Vizier is used. All VSX objects with minimum magnitude brighter 12 and maximum magnitude brighter 10 are filtered. 1 arcsec cross-matching is performed.