J/AJ/139/2026 TAOS variable stars (Mondal+, 2010)
The Taiwanese-American Occultation Survey project stellar variability.
II. Detection of 15 variable stars.
Mondal S., Lin C.C., Chen W.P., Zhang Z.-W., Alcock C., Axelrod T.,
Bianco F.B., Byun Y.-I., Coehlo N.K., Cook K.H., Dave R., Kim D.-W.,
King S.-K., Lee T., Lehner M.J., Lin H.-C., Marshall S.L., Protopapas P.,
Rice J.A., Schwamb M.E., Wang J.-H., Wang S.-Y., Wen C.-Y.
<Astron. J., 139, 2026-2033 (2010)>
=2010AJ....139.2026M 2010AJ....139.2026M
ADC_Keywords: Stars, variable ; Photometry
Keywords: methods: data analysis - stars: imaging - stars: variables: Cepheids -
stars: variables: delta Scuti - stars: variables: general -
stars: variables: RR Lyrae - surveys
Abstract:
The Taiwanese-American Occultation Survey (TAOS) project has collected
more than a billion photometric measurements since 2005 January. These
sky survey data-covering timescales from a fraction of a second to a
few hundred days-are a useful source to study stellar variability. A
total of 167 star fields, mostly along the ecliptic plane, have been
selected for photometric monitoring with the TAOS telescopes. This
paper presents our initial analysis of a search for periodic variable
stars from the time-series TAOS data on one particular TAOS field, No.
151 (RA=17:30:6.7, DE=27:27:30, J2000), which had been observed over
47 epochs in 2005. A total of 81 candidate variables are identified in
the 3deg2 field, with magnitudes in the range 8<R<16. On the
basis of the periodicity and shape of the light curves, 29 variables,
15 of which were previously unknown, are classified as RR Lyrae,
Cepheid, delta Scuti, SX Phonencis, semi-regular, and eclipsing
binaries.
Description:
The TAOS telescope system consists of an array of four 50cm, fast
optics (f/1.9), wide-field robotic telescopes, sited at Lulin
Observatory (longitude 120°52'25"E; latitude 23°28'07"N,
elevation 2862m) in central Taiwan.
TAOS images are obtained with a filter close (but not identical) to
the standard R optical band.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 123 18 Known variable stars
table2.dat 84 15 Previously unknown variables
table3.dat 53 29 Catalog for variable stars
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See also:
I/284 : The USNO-B1.0 Catalog (Monet+ 2003)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- USNO USNO-B1.0 designation
14- 39 A26 --- Name Star Name
41- 46 F6.3 mag Vmag ? V magnitude or upper value of V magnitude
interval
47 A1 --- --- [-]
48- 52 F5.2 mag Vmagl ? Lower value of V magnitude interval
53- 57 F5.3 mag Vamp ? Amplitude in V (or R, see n_Vamp) band
59- 60 A2 --- n_Vamp [R1 ] when R1 instead of V in magnitude
62- 66 F5.2 mag mag.u ? Upper value of TAOS magnitude interval
67 A1 --- --- [-]
68- 72 F5.2 mag mag.l ? Lower value of TAOS magnitude interval
74- 75 I2 -- Nf ? Number of observed frames
77- 82 F6.4 mag e_mag ? rms in TAOS magnitude
84- 88 A5 --- SpT MK spectral type
90- 96 F7.5 s Per ?=- Known period
97 A1 --- l_PerLS [~] Limit flag on PerLS
98-106 F9.5 s PerLS ?=- Period determined with Least Squares method
108 A1 --- l_Per04 [~] Limit flag on PerLS
109-117 F9.5 s Per04 ?=- Period determined with Period04 method
119-123 F5.3 mag Amp ? Semi-amplitude of variation
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [TAOS]
6- 11 A6 --- TAOS TAOS designation (NNN-NN)
13- 23 F11.7 deg RAdeg Right ascension in decimal degrees (J2000)
25- 35 F11.7 deg DEdeg Declination in decimal degrees (J2000)
37- 48 A12 --- USNO USNO ID
50- 55 F6.3 mag mag Calibrated TAOS magnitude
57- 61 F5.3 mag e_mag Error on TAOSmag
63- 68 F6.4 mag rms Magnitude rms of the light curve
70- 71 I2 --- Nf [84/93] Number of observations used
in the analysis
73- 78 F6.3 d Per Derived period
80- 84 A5 --- Class Variable classification (1)
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Note (1): variable classification on the basis of the shape of light
curves, periods, and semi-amplitudes.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1 A1 --- Note [KU] Known or Unknown variables
3- 14 F12.7 --- USNO USNO-B1.0 designation
16- 20 F5.3 arcsec DDiff Offset from TAOS observation
22- 26 F5.2 mag B2mag ?=- USNO B2 magnitude
28- 32 F5.2 mag R2mag USNO R2 magnitude
34- 39 F6.3 mag Jmag 2MASS J magnitude
41- 46 F6.3 mag Hmag 2MASS H magnitude
48- 53 F6.3 mag Ksmag 2MASS Ks magnitude
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History:
From electronic version of the journal
References:
Lehner et al., Paper I, 2009PASP..121..138L 2009PASP..121..138L
(End) Patricia Vannier [CDS] 28-May-2012