J/AJ/138/1435 Photometric observations of UX Monocerotis (Olson+, 2009)
Mass transfer variations in UX Monocerotis: eight years of automated photometric
monitoring.
Olson E.C., Henry G.W., Etzel P.B.
<Astron. J., 138, 1435-1441 (2009)>
=2009AJ....138.1435O 2009AJ....138.1435O
ADC_Keywords: Stars, variable ; Photometry ; Binaries, eclipsing
Keywords: binaries: eclipsing - stars: individual (UX Monocerotis) -
techniques: photometric
Abstract:
We analyze eight years (1999-2007) of automated photometric
observations of the active Algol binary UX Monocerotis (HD 65607;
P=5.90day; A5III-IVe+G2III) to search for mass transfer bursts similar
to those seen in U Cephei. The largest photometric anomaly is the mean
gainer luminosity difference between the stream-impact hemisphere and
the opposite hemisphere. We find an updated Wilson-Devinney solution
for earlier six-color observations. The UX Mon donor star fills its
Roche lobe and the gainer nearly fills its rotational lobe. Instead of
isolated bursts of the U Cep type, we found nearly continuous
brightness fluctuations likely produced by variable mass transfer.
Description:
We acquired new photometry of UX Mon with the T3(0.4m) Automated
Photometric Telescope (APT) at Fairborn Observatory in southern
Arizona. The precision photometer for the T3 APT is based around
a temperature-stabilized EMI 9924B bi-alkali photomultiplier tube
detector, which counts photons through Johnson B and V filters. More
than 800 group observations of UX Mon were obtained with the APT
during eight observing seasons between 1999 September and 2007 May.
Objects:
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RA (2000) DE Designation(s)
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07 59 16.4 -07 30 18 HD 65607 = V* UX Mon
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 23 6068 Iybvuri observations of UX Monocerotis
table6.dat 40 820 APT observations of UX Mon (HD 65607)
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See also:
B/gcvs : General Catalogue of Variable Stars (Samus+ 2007-2012)
III/231 : The Tycho-2 Spectral Type Catalog (Wright+, 2003)
II/168 : Homogeneous Means in the UBV System (Mermilliod 1991)
J/A+A/446/785 : Catalogue of eclipsing variables (Malkov+, 2006)
J/AJ/106/2096 : Limb-darkening coefficients in binaries (Van Hamme 1993)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1 A1 --- Filt [Ibiruvy] Filter (I, y, b, v, u, r or i)
3- 15 F13.5 d HJD Heliocentric Julian Date
17- 23 F7.4 mag D.mag Differential magnitude
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 --- HJD Heliocentric Julian Date
14- 19 F6.3 mag VarB ?=99.999 Variable - Comparison differential mag in B
(1)
21- 26 F6.3 mag VarV ?=99.999 Variable - Comparison differential mag in V
(1)
28- 33 F6.3 mag ChkB ?=99.999 Check - Comparison differential mag in B (1)
35- 40 F6.3 mag ChkV ?=99.999 Check - Comparison differential mag in V (1)
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Note (1): The '99.999' signifies that the differential magnitude was discarded
because its internal standard deviation exceeded 0.01 mag.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 23-Jan-2012