J/AJ/136/1067 New beta Lyrae and Algol candidates in NSVS (Hoffman+, 2008)
New β Lyrae and Algol candidates from the Northern Sky Variability Survey.
Hoffman D.I., Harrison T.E., Coughlin J.L., McNamara B.J., Holtzman J.A.,
Taylor G.E., Vestrand W.T.
<Astron. J., 136, 1067-1078 (2008)>
=2008AJ....136.1067H 2008AJ....136.1067H
ADC_Keywords: Binaries, eclipsing ; Photometry, infrared
Keywords: binaries: eclipsing
Abstract:
We have classified 409 objects in the Northern Sky Variability Survey
(NSVS) as new beta Lyrae or Algol-type eclipsing binaries. These
candidates have outside of eclipse magnitudes of ∼10-13. Through
automated Fourier analysis routines and some manual inspection, we
list the period, eclipse depths, coordinates, an estimate of the time
of primary eclipse, and the 2MASS colors for these candidates. This
list of new beta Lyrae type candidates greatly increases the number of
known systems of this type. We have also identified 37 candidate
low-mass, main-sequence pairs (M1,2<1M☉,T<5500K) in the NSVS
database. If confirmed, these systems will greatly increase the number
of such low-mass systems known as well as help constrain atmospheric
models for these types of stars.
Description:
The data used in the analysis are from the ROTSE-I project, which is
archived in the SkyDOT database (http://skydot.lanl.gov; Wozniak et
al. 2004AJ....127.2436W 2004AJ....127.2436W).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 101 409 New candidate β Lyrae
table2.dat 102 95 Refined candidate β Lyrae
table3.dat 64 103 Known β Lyrae
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See also:
B/gcvs : General Catalogue of Variable Stars (Samus+ 2007-2011)
J/AJ/128/2965 : Red variables in the NSVS (Williams+, 2004)
J/AJ/133/1470 : TAROT suspected variable star catalog (Damerdji+, 2007)
http://skydot.lanl.gov/nsvs/nsvs.php : NSVS Home Page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 F9.5 deg RAdeg Right Ascension in decimal degrees (J2000)
11- 19 F9.5 deg DEdeg Declination in decimal degrees (J2000)
21- 28 I8 --- NSVS Object identification number (G1)
30- 37 F8.5 d Per Period from Fourier analysis
39- 44 F6.3 mag J-H 2MASS (J-H) color index
46- 51 F6.3 mag H-Ks 2MASS (H-Ks) color index
53- 58 F6.3 mag Ksmag 2MASS Ks band magnitude
60- 65 F6.3 mag Vmag Median ROTSE visual magnitude from NSVS database
67- 71 F5.3 mag e_Vmag Average photometric error in ROTmag
73- 77 F5.3 mag Dmag1 Primary (deepest) eclipse depth
79- 83 F5.3 mag Dmag2 Secondary eclipse depth
85- 95 F11.6 d Tmin Modified Julian Date time of primary eclipse
minimum
97-101 A5 --- Class Candidate classification (2)
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Note (2): Candidate classification class as follows:
LMB = probable low-mass binary
W UMa = probable W Ursa Majoris type system
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.5 deg RAdeg Right Ascension in decimal degrees (J2000)
11- 19 F9.5 deg DEdeg Declination in decimal degrees (J2000)
21- 28 I8 --- NSVS Object identification number (G1)
30- 38 F9.6 d pPer ? GCVS period
40- 47 F8.5 d cPer Current period determined in this paper
49- 54 F6.3 mag J-H 2MASS (J-H) color index
56- 61 F6.3 mag H-K 2MASS (H-Ks) color index
63- 68 F6.3 mag Ksmag 2MASS Ks band magnitude
70- 80 F11.6 d Tmin Modified Julian Date time of primary eclipse
minimum
82- 91 A10 --- pClass GCVS classification (2)
93-102 A10 --- cClass Current classification (2)
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Note (2): Classification codes (not exhaustive) as follows:
BL = β Lyrae
EB = Eclipsing Binary
V = Variable star
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.5 deg RAdeg Right Ascension in decimal degrees (J2000)
11- 19 F9.5 deg DEdeg Declination in decimal degrees (J2000)
21- 28 I8 --- NSVS Object identification number (G1)
30- 40 F11.8 d pPer GCVS period
42- 49 F8.5 d cPer Current period determined in this paper
51- 61 F11.6 d Tmin Modified Julian Date time of primary eclipse
minimum
63- 64 I2 --- Ref Reference (2)
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Note (2): References as follows:
1 = Samus & Durlevich (2004, Cat. B/gcvs)
2 = Otero (2008OEJV...83....1O 2008OEJV...83....1O)
3 = Damerdji et al. (2007, Cat. J/AJ/133/1470)
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Global notes:
Note (G1): The NSVS identification number of the object, but other synonym
names in the NSVS can exist.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 06-Apr-2011