J/PASP/124/693 HO Psc UBV(RI)c light curves (Samec+, 2012)
Observations, analysis, and spectroscopic classification of HO Piscium:
A bright shallow-contact binary with G- and M-type components.
Samec R.G., Smith P.M., Robb R., Faulkner D.R., Van Hamme W.
<Publ. Astron. Soc. Pac., 124, 693-699 (2012)>
=2012PASP..124..693S 2012PASP..124..693S
ADC_Keywords: Binaries, eclipsing ; Photometry, UBVRI
Keywords: Stars
Abstract:
We present a spectrum and a photometric analysis of the newly
discovered, high-amplitude, solar-type, eclipsing binary HO Piscium. A
spectroscopic identification, a period study, q-search, and a
simultaneous UBVRcIc light-curve solution are presented. The spectra
and our photometric solution indicate that HO Psc is a W-type W UMa
shallow-contact (fill-out ∼8%) binary system. The primary component
has a G6V spectral type with an apparently precontact spectral type of
M2V for the secondary component. The small fill-out indicates that the
system has not yet achieved thermal contact and thus has recently come
into physical contact. This may mean that this solar-type binary
system has not attained its ∼0.4 mass ratio via a long period of
magnetic braking, as would normally be assumed.
Description:
Our U, B, V, Rc, and Ic light curves were taken with the Lowell 0.81m
reflector in Flagstaff with a CryoTiger-cooled (←100°C) NASACAM,
a 2Kx2K chip, and standard UBVRI Johnson Cousins filters. They were
taken on 2008 September 19, 20, and 21 on Lowell scheduled time
through our association with the National Undergraduate Observatory.
The synthetic light-curve solution give a period of 0.32468±0.00003d.
Objects:
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RA (2000) DE Designation(s)
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01 30 16.47 +13 33 25.1 HO Psc = V* HO Psc
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 17 206 Photometry of HO Psc in ΔU
table2.dat 17 207 Photometry of HO Psc in ΔB
table3.dat 17 206 Photometry of HO Psc in ΔV
table4.dat 18 202 Photometry of HO Psc in ΔRc
table5.dat 18 201 Photometry of HO Psc in ΔIc
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Byte-by-byte Description of file: table*.dat
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Bytes Format Units Label Explanations
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1- 6 F6.3 mag dmag Differential magnitude in Band
8- 15 F8.4 d HJD Heliocentric Julian date (HJD-2454000)
17- 18 A2 --- Band [UBVRIc ] Band
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History:
From electronic version of the journal
Table1 (U photometry) not available because of erroneous values.
(End) Patricia Vannier [CDS] 26-Mar-2013