[vsnet-obs 53146] Re: Var. star in V1663AQL field

[Chris Lloyd]

The star is clearly variable in the NSVS data

http://skydot.lanl.gov/nsvs/star.php?num=14029623&mask=32020

with an amplitude of about 0.2 mag on a time scale of ~140 days. It is
very faint and noisy in the ASAS3 data

http://www.astrouw.edu.pl/cgi-asas/asas_variable/190447+0516.5,asas3,0,0,500,0,0

so they don't reveal anything. It is very red with b-r ~ 4 and V-R ~ 3, so
is almost certainly an LPV.

Chris


On Tue, 6 Sep 2005, Carlo Gualdoni wrote:

> Dear all,
>
> Cheking my observations of V1663 AQL, I find a possible
> low amplitude variable star near 122 star.
> I find nothing on SIMBIAD about the variability of this
> star.
>
> Identifiation is:
> GSC2.2 N020132017408
> J2000 RA:  19h04m47.48s   DE:+05°16'27.2"
>
> Reference Star: (122)
> GSC 470-00821
> J2000 RA:  19h04m59.32s   DE:+05°15'56.3"
>
> Check Star: (134)
> GSC 470-00597
> J2000 RA:  19h05m02.37s   DE:+05°17'08.3"
>
> Number of data points  15
> Start date (J.D.)      2453557
> End date (J.D.)        2453612
> Average mag.           14.48V
> Max mag.               14.35V
> Min mag.               14.57V
> Main Amplitude         0.11
> Main period            22.5
>
> ---------------------------------------
> Data set: (Maxim DL format)
>
> "T (JD)","Obj1","Ref1","Chk1"
> 2453557.4284490743,14.562,12.250,13.527
> 2453566.4793518516,14.498,12.250,13.534
> 2453567.4508796297,14.444,12.250,13.527
> 2453568.4673032407,14.413,12.250,13.522
> 2453573.4349421295,14.409,12.250,13.519
> 2453580.4202662036,14.552,12.250,13.502
> 2453586.4646759261,14.566,12.250,13.534
> 2453587.4204976852,14.471,12.250,13.514
> 2453590.3867129628,14.414,12.250,13.519
> 2453591.4377199076,14.379,12.250,13.527
> 2453592.4543518517,14.353,12.250,"NA"
> 2453597.4487152779,14.372,12.250,13.513
> 2453600.3848379632,14.480,12.250,13.511
> 2453606.3909259262,14.566,12.250,13.511
> 2453607.3670833334,14.558,12.250,13.518
> 2453612.3448148146,14.449,12.250,13.516
> ---------------------------------------
> Instruments:
> LX200GPS 10" + SBIG ST7XME + V filter
>
> Can someone check this observation?
>
> Regards,
>
> Carlo Gualdoni ( Como - Italy )
>
>