J/MNRAS/427/3374 QUEST RR Lyrae Survey III. Low Galactic latitude (Mateu+, 2012)
The QUEST RR Lyrae Survey. III. The low Galactic latitude catalogue.
Mateu C., Vivas A.K., Downes J.J., Briceno C., Zinn R., Cruz-Diaz G.
<Mon. Not. R. Astron. Soc., 427, 3374-3395 (2012)>
=2012MNRAS.427.3374M 2012MNRAS.427.3374M
ADC_Keywords: Stars, variable; Positional data; Stars, distances ; Photometry
Keywords: astronomical data bases: miscellaneous - surveys -
stars: variables: RR Lyrae - Galaxy: stellar content -
Galaxy: structure
Abstract:
We present results for the QUEST RR Lyrae Survey at low Galactic
latitude, conducted entirely with observations obtained with the QUEST
mosaic camera and the 1.0/1.5-m Jurgen Stock Schmidt telescope at the
National Observatory of Venezuela. The survey spans an area of
476deg2 on the sky, with multi-epoch observations in the V, R and I
photometric bands for 6.5x106 stars in the Galactic latitude range
-30°≤b≤+25°, in a direction close to the Galactic anticentre
190°≤l≤230°. The variability survey has a typical number of
30 observations per object in V and I and ∼25 in R, with up to
∼120-150 epochs in V and I and up to ∼100 in R in the best sampled
regions. The completeness magnitudes of the survey are V=R=18.5mag,
and I=18.0mag. We identified 211 RR Lyrae stars, 160 bona fide stars
of type ab and 51 candidates of type c, ours being the first deep RR
Lyrae survey conducted at low Galactic latitude, in the Galactic disc.
The completeness of the RR Lyrae survey was estimated in ≳95 and ∼85
per cent for RRab and RRc stars, respectively. Photometric
metallicities were computed based on the light curves and individual
extinctions calculated from minimum light colours for each RRab star.
Distances were obtained with typical errors ∼7 per cent. The RR Lyrae
survey simultaneously spans a large range of heliocentric distances
0.5≤Rhel(kpc)≤40 and heights above the plane -15≤z(kpc)≤+20,
with well-known completeness across the survey area, making it an
ideal set for studying the structure of the Galactic thick disc.
Description:
The present survey spans a total area of 476 deg2 and makes use of
archive observations obtained between late 1998 and mid-2008 with the
QUEST camera and the 1.0/1.5-m Jurgen Stock Schmidt telescope at the
NOV in Llano del Hato, Venezuela.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 65 1877 Magnitudes for second-order photometric standards
table6.dat 107 163 Light-curve parameters for RRab stars
table7.dat 107 47 Light curve parameters for RRc stars
table8.dat 47 160 Distances, colour excesses and metallicities
for RRab stars
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See also:
II/296 : QUEST1 variability survey (QVS). III. (Rengstorf+, 2009)
J/AJ/127/1158 : QUEST RR Lyrae Survey first catalog (Vivas+, 2004)
J/AJ/132/714 : QUEST RR Lyrae survey. II. Halo overdensities (Vivas+, 2006)
J/AJ/136/1645 : Spectroscopy of bright QUEST RR Lyrae stars (Vivas+, 2008)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 2 A2 --- --- [ss]
3- 6 I4 --- ssID [4000/5876] Star designation (ssNNNN)
8- 17 F10.6 deg RAdeg Right ascension (J2000)
19- 26 F8.5 deg DEdeg Declination (J2000)
28- 33 F6.3 mag Vmag V magnitude
35- 39 F5.3 mag e_Vmag rms uncertainty on Vmag
41- 46 F6.3 mag Rmag R magnitude
48- 52 F5.3 mag e_Rmag rms uncertainty on Rmag
54- 59 F6.3 mag Imag I magnitude
61- 65 F5.3 mag e_Imag rms uncertainty on Imag
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Byte-by-byte Description of file: table6.dat table7.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- ID [3/1158] Star sequential number
6- 15 F10.6 deg RAdeg Right ascension (J2000)
17- 25 F9.6 deg DEdeg Declination (J2000)
27- 29 I3 --- NV [0/128] Number of observation in V band
31- 32 I2 --- NR [0/88] Number of observation in R band
34- 36 I3 --- NI [0/119] Number of observation in I band
38- 45 F8.6 d Per [0.2/0.9] Period
47- 50 F4.2 mag Vamp ?=- Amplitude in V band
52- 55 F4.2 mag Ramp ?=- Amplitude in R band
57- 60 F4.2 mag Iamp ?=- Amplitude in I band
62- 74 F13.8 d T0 Time of maximum light (HJD-2450000)
76- 80 F5.2 mag ?=- Mean V magnitude
82- 85 F4.2 mag e_ ?=- rms uncertainty on
87- 91 F5.2 mag ?=- Mean R magnitude
93- 96 F4.2 mag e_ ?=- rms uncertainty on
98-102 F5.2 mag ?=- Mean I magnitude
104-107 F4.2 mag e_ ?=- rms uncertainty on
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Byte-by-byte Description of file: table8.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- ID Star sequential number
6- 9 F4.2 mag E(B-V) B-V colour excess
11- 14 F4.1 [Sun] [Fe/H] Metallicity
16- 18 F3.1 [Sun] e_[Fe/H] rms uncertainty on [Fe/H]
20- 23 F4.1 kpc Rh Heliocentric distance
25- 28 F4.1 kpc e_Rh rms uncertainty on Rh
30- 34 F5.1 kpc z Height above the plane
36- 38 F3.1 kpc e_z rms uncertainty on z
40- 43 F4.1 kpc Rg Radial distance projected on the Galactic plane
45- 47 F3.1 kpc e_Rg rms uncertainty on R
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History:
From electronic version of the journal
References:
Vivas et al., Paper I 2004AJ....127.1158V 2004AJ....127.1158V, Cat. J/AJ/127/1158
Vivas & Zinn, Paper II 2006AJ....132..714V 2006AJ....132..714V, Cat. J/AJ/132/714
(End) Patricia Vannier [CDS] 06-Sep-2013