J/A+AS/124/291 Photometry of V700 Cyg and AW Vir (Niarchos+ 1997)
V700 Cygni and AW Virginis: Two W-type W UMa systems with spotted components
Niarchos P.G., Hoffmann M., Duerbeck H.W.
<Astron. Astrophys. Suppl. Ser. 124, 291 (1997)>
=1997A&AS..124..291N 1997A&AS..124..291N (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, eclipsing ; Photometry
Keywords: Stars: V700 Cyg, AW Vir - binaries: eclipsing - starspots
Abstract:
A photometric analysis of the W UMa systems V 700 Cyg and AW Vir,
based on photoelectric B and V light curves, is presented. Since no
spectroscopic mass-ratio is available, the q-search method was applied
to find the preliminary range of the mass-ratio in order to search for
the final solution. First, an unspotted solution was carried out by
using the unperturbed parts of the light curves and applying the DC
program of the WD code. The final spotted solution was made by
adopting spot models for the two systems. In the case of V 700 Cyg,
two cool spots were placed on the primary (more massive, larger and
cooler) component to explain the O'Connell effect (MaxII fainter than
MaxI) and a small deficit of light just before MaxI. In the case of AW
Vir, one cool spot was placed on the primary component to explain the
relatively large O'Connell effect. Both objects are W-type systems
with partial eclipses; V 700 Cyg is fairly evolved while AW Vir is
rather unevolved.
Objects:
-------------------------------------
RA (2000) DE Designation(s)
-------------------------------------
20 31 13 +38 47.7 V700 Cyg
13 27 32 +03 02.5 AW Vir
--------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1 34 38 Times of minima of V700 Cyg
table2 48 50 Times of minima of AW Vir
table3 19 125 Normal points for V700 Cyg in intensity units
table4 19 127 Normal points for AW Vir in intensity units
tables.tex 78 279 LaTeX version of tables
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table1 table2
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 12 F12.4 d HJD time of minimum light
14- 21 F8.1 --- Cycles Cycles
23- 29 F7.4 d O-C Observed-Computed value
31- 47 A17 --- Ref References (1)
48 A1 --- Note [*] *: omitted in least square solution
--------------------------------------------------------------------------------
Note (1): AH = Agerer & Huebscher (1995IBVS.4222....1A 1995IBVS.4222....1A)
BB + number = various issues of the BBSAG
BH = Busch (1964, Hartha Beobachtungs-Zirkular, 27-28)
GL = Lapasset & Gomez (1995IBVS.4144....1L 1995IBVS.4144....1L)
J = Jensch (1936AN....256..279J 1936AN....256..279J)
K = Koch (1961AJ.....66...35K 1961AJ.....66...35K)
MH = Hoffmann (1983IBVS.2344....1H 1983IBVS.2344....1H)
R = Romano (1969MmSAI..40..375R 1969MmSAI..40..375R)
W1 = Whitney (1952AJ.....56..206W 1952AJ.....56..206W)
W2 = Whitney (1955AJ.....60..453W 1955AJ.....60..453W)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3 table4
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 A1 --- Filt [BV] Filter
3- 8 F6.4 --- Phase [0/1[ Phase
10- 15 F6.4 --- Int Intensity in Filt passband (1)
17- 18 I2 --- n_Int Number of single observations (2)
--------------------------------------------------------------------------------
Note (1): The data are normalized to intensity = 1.0 at phases 0.25 and 0.75.
Note (2): The single observations were published by M. Hoffmann, Veroeff.
Astr. Inst. Bonn No. 96 (1984)
--------------------------------------------------------------------------------
Acknowledgements: Hilmar Duerbeck
(End) Patricia Bauer [CDS] 20-Feb-1997