SIMBAD references

2018RAA....18..139W - Research in Astron. and astroph., 18, 139-139 (2018/November-0)

The first CCD photometric study of the open cluster NGC 744.

WANG K., DENG L.-C., LUO Z.-Q., YAN Z.-Z., LIU Q.-L., SUN J.-J. and ZHOU Q.

Abstract (from CDS):

We present the first CCD photometric observations of open cluster NGC 744, as part of the 50BiN Open Cluster Survey. The color-magnitude diagrams of this cluster were derived from absolute BV RI photometry on a good photometric night. A brief isochrone fitting gives a distance modulus of (m-M )V = 11.58±0.2 and a reddening of E(B-V) = 0.35±0.05 with an age of log t = 8.30±0.05. By carefully examining the BV time-series data, we discovered four new variable stars in a 20' x 20' field around the cluster. We classified them as three eclipsing binary stars and one δ Scuti pulsating star, mainly based on the light-curve shape, the detected periods and the positions on the color-magnitude diagrams.

Abstract Copyright:

Journal keyword(s): open clusters and associations: individual: (NGC 744) - stars: variables: general

Nomenclature: Fig. 6, Table 4: [WDL2018] VN (Nos V1-V4).

CDS comments: Standard star SA23-F1 not in SIMBAD.

Simbad objects: 7

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