J/MNRAS/441/715 Mid-infrared study of RR Lyrae stars (Gavrilchenko+, 2014)
A mid-infrared study of RR Lyrae stars with the
Wide-field Infrared Survey Explorer all-sky data Release.
Gavrilchenko T., Klein C.R., Bloom J.S., Richards J.W.
<Mon. Not. R. Astron. Soc., 441, 715-725 (2014)>
=2014MNRAS.441..715G 2014MNRAS.441..715G
ADC_Keywords: Stars, variable ; Photometry, UBVRI ; Photometry, SDSS ;
Photometry, infrared
Keywords: methods: statistical - stars: variables: RR Lyrae - distance scale -
infrared: stars
Abstract:
We present a group of 3740 previously identified RR Lyrae variables
well observed with the Wide-field Infrared Survey Explorer (WISE). We
explore how the shape of the generic RR Lyrae mid-infrared light curve
varies over period-space, comparing light curves in mid-infrared and
optical bands. We find that optical light curves exhibit high
amplitudes and a large spectrum of light-curve shapes, while
mid-infrared light curves have low amplitudes and uniform light-curve
shapes. From the period-space analysis, we hope to improve the
classification methods of RR Lyrae variables and enable reliable
discovery of these pulsators in the WISE catalogue and future
mid-infrared surveys such as the James Webb Space Telescope. We
provide mid-infrared templates for typical RR Lyrae stars and
demonstrate how these templates can be applied to improve estimates of
mid-infrared RR Lyrae mean magnitude, which is used for distance
measurement. This method of template fitting is particularly
beneficial for improving observational efficiency. For example, using
light curves with observational noise of 0.05mag, we obtain the same
level of accuracy in mean magnitude estimates for light curves
randomly sampled at 12 data points with template fitting as with light
curves randomly sampled at 20 data points with harmonic modelling.
Description:
The first goal was to find a large sample of WISE-observed RR Lyrae
stars. A data base of previously identified RR Lyrae stars was
created, combining information from General Catalogue of Variable
Stars (GCVS), All Sky Automated Survey (ASAS), SIMBAD, VizieR, and
individual papers. For many of the sources in this data base the only
available data were the coordinates and RR Lyrae classification. When
provided, information about the period, distance, subclass, and
magnitude for several different wavebands was also stored. If a single
source appeared in multiple surveys or papers, information from all
relevant surveys was included, with markers indicating contradicting
measurements between surveys. The resulting data base contains about
17000 sources, of which about 5000 sources have documented V-band
periods.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 295 16904 Catalog of known RR Lyrae
table2.dat 66 26 References
table3.dat 158 3740 WISE RR Lyrae catalogue
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See also:
B/gcvs : General Catalogue of Variable Stars (Samus+ 2007-2013)
J/A+A/291/121 : Study of star V9 in 47 Tuc (Storm+ 1994)
J/AJ/112/742 : Search for RR Lyrae Variables (Wetterer+ 1996)
J/AJ/114/2596 : RR Lyrae in new galactic bulge window (Blanco+, 1997)
J/AcA/53/27 : VI photometry of MM1 and MM7 OGLE fields (Pigulski+, 2003)
J/A+A/442/381 : Precise positions of RR Lyrae with Vmax>12.5 (Maintz, 2005)
J/ApJ/651/197 : Galactic Bulge OGLE fundamental-mode RR Lyrae (Collinge+ 2006)
J/A+A/463/589 : Variables stars in NGC 362 (Szekely+, 2007)
J/A+A/475/1159 : Supervised classification of variable stars (Debosscher+ 2007)
J/AcA/59/33 : ASAS. Variable stars catalog in Kepler field (Pigulski+, 2009)
J/AJ/139/357 : Variable stars in NGC 5286 (Zorotovic+, 2010)
J/ApJS/203/32 : Machine-learned ASAS Classification Cat, MACC (Richards+ 2012)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
--------------- ----------------------------------------------------------------
1- 30 A30 --- Name Source identifier, typically inherited from
the first reference
32- 43 F12.8 deg RAdeg Right ascension (J2000)
45- 56 F12.8 deg DEdeg Declination (J2000)
58- 61 A4 --- Class Subclass (RRAb, RRc or RRd)
64- 83 F20.16 --- Per1 [0.03/509]? Period
84 A1 --- --- [/]
85- 98 F14.12 --- Per2 [0.26/0.93]? Second Period value
99 A1 --- --- [/]
100-104 F5.3 --- Per3 [0.28/0.68]? Third Period value
106-111 F6.3 mag Umag ? Apparent magnitude in the U band
112 A1 --- --- [/]
113-118 F6.3 mag Umag2 ? Second value of U apparent magnitude
121-126 F6.3 mag Bmag ? Apparent magnitude in the B band
127 A1 --- u_Bmag Uncertainty flag on Bmag
128 A1 --- --- [/]
129-134 F6.3 mag Bmag2 ? Second value of B apparent magnitude
135 A1 --- --- [/]
136-141 F6.3 mag Bmag3 ? Third value of B apparent magnitude
142 A1 --- --- [/]
143-147 F5.2 mag Bmag4 ? Fourth value of B apparent magnitude
149-154 F6.3 mag Vmag ? Apparent magnitude in the V band
155 A1 --- u_Vmag [:]
156 A1 --- --- [/]
157-162 F6.3 mag Vmag2 ? Second value of V apparent magnitude
163 A1 --- --- [/]
164-169 F6.3 mag Vmag3 ? Third value of V apparent magnitude
170 A1 --- --- [/]
171-176 F6.3 mag Vmag4 ? Fourth value of V apparent magnitude
177 A1 --- --- [/]
178-182 F5.2 mag Vmag5 ? Other value of V apparent magnitude
184-189 F6.3 mag Rmag ? Apparent magnitude in the R band
190 A1 --- --- [/]
191-196 F6.3 mag Rmag2 ? Second value of R apparent magnitude
198-203 F6.3 mag Imag ? Apparent magnitude in the I band
204 A1 --- --- [/]
205-210 F6.3 mag Imag2 ? Second value of I apparent magnitude
211 A1 --- --- [/]
212-216 F5.2 mag Imag3 ? Third value of I apparent magnitude
217 A1 --- --- [/]
218-222 F5.2 mag Imag4 ? Fourth value of I apparent magnitude
223-228 F6.3 mag Jmag ? Apparent magnitude in the J band
230-235 F6.3 mag Hmag ? Apparent magnitude in the H band
237-242 F6.3 mag Kmag ? Apparent magnitude in the K band
244-249 F6.3 mag umag ? Apparent magnitude in the SDSS u filter
251-256 F6.3 mag gmag ? Apparent magnitude in the SDSS g filter
258-263 F6.3 mag rmag ? Apparent magnitude in the SDSS r filter
265-270 F6.3 mag imag ? Apparent magnitude in the SDSS i filter
272-277 F6.3 mag zmag ? Apparent magnitude in the SDSS z filter
279-295 A17 --- Ref Reference to the origin of the source (1)
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Note (1): in table2.dat, which can be used to look up the Simbad/ADS
bibliographic identifier in the reference table. Separated by commas where
more that one reference is applicable.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- Ref Reference code
4- 22 A19 --- BibCode BibCode
24- 41 A18 --- Aut Author's name
43- 46 I4 --- Nobj [8/8539] Number of objects provided by the
reference in table1.dat
48- 66 A19 --- Com Comments
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Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 I5 --- Seq Sequential number
7- 18 F12.8 deg RAdeg Right ascension (J2000)
20- 31 F12.8 deg DEdeg Declination (J2000)
33- 36 A4 --- Class Subclass (RRab or RRc)
37 A1 --- u_Class [*] Class estimated (1)
39- 52 F14.12 d Per [0.2/1.01] Pulsation period
54- 60 E7.3 d e_Per Error on the period measurement
62- 70 F9.3 pc Dist [131/13000] Distance to the source (2)
72- 79 F8.3 pc e_Dist [1.9/1152] Error on the distance measurement
81- 84 I4 --- o_W1mag [10/1140]? Number of magnitude observations
in the W1-band light curve
86- 91 F6.3 mag W1mag ? Mean flux magnitude in the W1-band
93- 97 F5.3 mag e_W1mag [0.003/0.051]? Error on W1mag
99-103 F5.3 mag W1amp [0.06/0.7]? Magnitude of peak-to-peak model
amplitude in the W1-band
105-108 I4 --- o_W2mag [10/1131]? Number of magnitude observations
in the W2-band light curve
110-115 F6.3 mag W2mag ? Mean flux magnitude in the W2-band
117-121 F5.3 mag e_W2mag [0.003/0.045]? Error on W2mag
123-127 F5.3 mag W2amp [0.05/0.7]? Magnitude of peak-to-peak model
amplitude in the W2-band
129-158 A30 --- Name Source identifier as in table1.dat
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Note (1): No asterisk indicates this is a previously determined classification.
An asterisk indicated this is a rough guess based on the period length.
Note (2): using period-luminosity relations and the derived period.
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History:
12-Jun-2015: From electronic version of the journal
14-Aug-2018: For source at 016.45892 -70.68879 (line 1304),
wrong 2MASS name (2MASS_J01041014-7057221) and associated
Jmag, Hmag and Kmag suppressed
(End) Patricia Vannier [CDS] 02-Feb-2015