# Search for variable stars in the northern sky:Analysis of photometric time series for 3598 stars

## TL;DR

This study conducted a comprehensive search for new variable stars in the northern sky using photometric time series analysis of 3598 stars, discovering 81 new variables and providing valuable data for future astronomical research.

## Contribution

The paper introduces a new dataset of variable stars identified through extensive photometric analysis, including spectroscopic follow-up, enhancing the catalog of known variable stars in the northern sky.

## Key findings

- Discovered 81 new variable stars, including eclipsing binaries and δ Scuti candidates.
- Provided detailed light curves and observational data for 3598 stars.
- Confirmed variability and eclipsing nature of TYC 2764-1997-1.

## Abstract

As extensive ground-based observations and characterisation of different variable stars are of the utmost importance in preparing optimal input catalogues for space missions, our aim was to search for new variable stars in selected fields of the northern sky. We obtained 24470 CCD images and analysed photometric time series of stars using the DAOPHOT based package Muniwin as the first step, and the Period04 package was used to further analyse the suspected new variable stars. The light curves and other observational results are presented for 3598 stars online. We found 81 new variable stars, among them is an eclipsing binary with a variable component and possibly eccentric orbits TYC4038-693-1 which we also observed spectroscopically, four {\delta} Scuti candidates, six other variable stars with periods falling into the interval of 35 minutes to 20 days. Furthermore, we identified 70 slowly varying stars with so far undefined periodicity. Additional photometric and spectral observations were carried out for TYC 2764-1997-1, and its previous candidacy for eclipsing binaries was approved.