[vsnet-alert 11909] V1032 Oph: updated ephemeris
Taichi Kato
tkato at kusastro.kyoto-u.ac.jp
Thu Apr 8 15:19:54 JST 2010
V1032 Oph: updated ephemeris
Enrique de Miguel Agustino has reported further observations as below:
The ephemeris now appears to agree with vsnet-alert 11907.
The strongest superhump signal (more careful analysis still required)
is 0.08546(8) d.
===
Variable: V1032 Oph
Date: 07-08 April
Comp star: USNO-A2.0 0825-09356260 (16:25:55.77 -03:53:32.2) with
12.82R
Check star: USNO-A2.0 0825-09353329 (16:25:42.04 -03:53:28.1) with
12.18R
Integ time: 60s
Instrument: 0.25 m reflector f/4.8
Camera: QSI-516ws
Filter: Clear
Observatory: Huelva (Spain)
Comments: Very good weather conditions.
Run covering about 2h 30m. The first minima happens
at the very begining of the run. This is included below
with an uncertainty estimated as 2 min.
A second minima is also captured close to the end
of the run.
Times of minima of the eclipses are:
JD date (UT)
run01 2455286.67964(17) March 31 04h 18m 41s
run03 2455290.65062(14) April 04 03h 36m 52s
run04 2455292.67675(11) April 06 04h 14m 31s
run05 2455294.62380(140) April 08 02h 58m 16s (2 min
error)
2455294.70363(7) April 08 04h 53m 14s
Note that heliocentric corrections have not been applied.
Using linear regression I find
JD = 2455286.67924 + 0.081053 * E
Average magnitude 15.74(15) assuming mag(comp)=12.82
(which is the R mag of the comp according to USNO-A2.0.
This is 0.16 mag fainter than run03
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