2017MNRAS.468.2816M

Query : 2017MNRAS.468.2816M

2017MNRAS.468.2816M - Mon. Not. R. Astron. Soc., 468, 2816-2821 (2017/July-1)

Low-mass variable stars in the globular cluster NGC 6397.

MARTINAZZI E., KEPLER S.O. and COSTA J.E.S.

Abstract (from CDS):

We have conducted a photometric survey of the globular cluster NGC 6397 in a search for variable stars. We obtained ∼11 h of time-resolved photometric images with one European Southern Observatory-Very Large Telescope using the FOcal Reducer and low dispersion Spectrograph imager distributed over two consecutive nights. We analysed 8391 light curves of stars brighter than magnitude 23 with the 465-nm filter, and we identified 412 variable stars, reaching ∼4.8 ± 0.2 per cent of variability with time-scales between 0.004 and 2 d, with amplitudes variation greater than ±0.2 mag.

Abstract Copyright: © 2017 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): convection - methods: data analysis - techniques: photometric - stars: chromospheres - stars: low-mass - stars: variables: general - stars: variables: general

VizieR on-line data: <Available at CDS (J/MNRAS/468/2816): tablea1.dat>

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

CDS comments: In Introduction : NGC 6101 is a misprint for NGC 6121.

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 M 4 GlC 16 23 35.22 -26 31 32.7           ~ 1978 0
2 NGC 6397 GlC 17 40 42.09 -53 40 27.6     5.17     ~ 2103 0

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