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Science Imaging

A quick request for observations.....
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I apologize that I am posting all of this info after the fact. I have imaged it on 5 nights now and it is very interesting. I suspect we will image it in the future as well.

I am attaching two light curves from the night of Sept 3, 2015.

Willie
The target is LS IV-14 116. I am attaching a finder chart and photometry from AAVSO.

Willie
On Aug 18, 2015, at 16:31, Judith Provencal <jlprov@gmail.com> wrote:

Hi Willie and Dean,

I was at the International Astronomical Union meeting last week, and we got a very short-notice request for observations.  Simon Jeffery is the PI on this object.  He wants to eventually have a full WET run on it, so this is an exploratory run.  I think it is something that PJMO could help on too.  I think you have a filter wheel???
I'm going to try to get some observations from Mt. Cuba as well.
Below is some info that Simon sent me.  Let me know if you are interested.

Cheers,
Judi

_____________________________________________





In support of upcoming HST and VLT/UVES spectroscopy, 
we seek photometric monitoring for the pulsating helium and
zirconium-rich hot subdwarf:  LS IV-14 116

RA 20 57 38.8 J2000
Dec -14 25 47 J2000
B=12.6
V=13.0

The star shows at least 5 independent pulsation frequencies. The objective of these
observations is to resolve the frequencies, to measure their amplitudes, and also
to measure the amplitude of any colour variations, so as to set the high-resolution
spectroscopy and ultraviolet spectrophotometry into context. 

Requirements are 
i) at least one of Johnson B and V  (both if available, cycled BVBVB…., and/or  BVRBVR... or BVIBVI.. )
ii) 10,000 target counts per frame (for LS IV-14 116, unless bright comparison is saturated and no other good comparisons in field).  
iii) exposures times 60 seconds or less (per filter)
iv) timestamps on image frames to be precise and regularly checked against GPS or other external clock.
v) minimum useful runs:  2 hours — data obtained over long runs and several nights is preferred. 
vi) useful dates: 19 August to 2nd September

Comparison stars (see attached finder):
2) TYC 5782-1367-1: V=11.4   (beware of saturating)
3) 2MASS J20574148-1426122: V~16
4 and 5). As many other stars in the field as possible — depends strongly on size of field

For a general background see:

AAVSO observations would supplement photometry due to be obtained 
with the SAAO 1.0m and IAC 0.8m telescopes from 18 August to 2 September
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