J/ApJ/651/197 OGLE fundamental-mode RR Lyrae in Galactic Bulge (Collinge+, 2006)
Catalog of fundamental-mode RR Lyrae stars in the Galactic Bulge from the
Optical Gravitational Lensing Experiment.
Collinge M.J., Sumi T., Fabrycky D.
<Astrophys. J., 651, 197-210 (2006)>
=2006ApJ...651..197C 2006ApJ...651..197C
ADC_Keywords: Stars, variable ; Photometry
Keywords: dust, extinction - Galaxy: center - stars: variables: other
Abstract:
We present a catalog of 1888 fundamental-mode RR Lyrae stars detected
in the Galactic bulge fields of the second phase of the Optical
Gravitational Lensing Experiment (OGLE). The catalog includes basic
parameters of the light curves, identifications of Blazhko
frequencies, V-I colors at minimum light (for most stars), and other
information for each star. We detect a high rate of incidence of the
Blazhko phenomenon (at least 27.6%), including unprecedentedly many
frequency triplets, which we attribute to our sensitive search method.
We find that the minimum light V-I color (useful as a reddening
indicator) grows slowly redder with increasing period and exhibits a
star-to-star scatter of approximately 0.07mag. We use this color to
evaluate the zero-point accuracy of the reddening map of the Galactic
bulge derived from OGLE data and find that in addition to low-level
random errors or resolution effects (responsible for much of the
scatter), the map may systematically over-represent E(V-I) by
approximately 0.05mag in most fields.
Description:
The data used in the present work were collected during the second
phase of the OGLE project (OGLE-II hereafter). Details of the
instrumental setup, calibration, and data pipeline can be found in
Udalski et al. (2002, Cat. J/AcA/52/217, and references therein),
who presented BVI photometric maps of the OGLE-II Galactic bulge
fields.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 106 1913 RRab sample
table3.dat 89 616 Blazhko stars
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See also:
J/AcA/52/217 : OGLE VI photometry of Galactic Bulge (Udalski+, 2002)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Field Field identifier (BUL_SC + number)
4- 9 I6 --- OGLE Catalog number from Udalski et al.
(2002, Cat. J/AcA/52/217) (G1)
11- 18 F8.5 h RAhour Hour of Right Ascension (J2000)
20- 27 F8.4 deg DEdeg Declination in decimal degrees (J2000)
29- 35 F7.5 d Per Period
37- 41 F5.2 mag Imag The I magnitude at mean flux
43 I1 --- u_Imag [0/1] Imag quality (1=might be unreliable)
45- 48 F4.2 mag Iamp The I-band pulsation amplitude
50- 52 I3 --- o_Imag Number of Imag observations
54- 58 F5.1 --- chi2 The χ2/degree of freedom for a
6-harmonic Fourier fit
60- 64 F5.2 mag Vmag ?=99.99 Mean Udalski et al. (2002,
Cat. J/AcA/52/217) V magnitude
66 I1 --- u_Vmag [0/1] Vmag quality (1=might be unreliable)
68- 72 F5.2 mag V-I The (V-I) color index at minimum light
74- 77 F4.2 mag e_V-I ?=0.00 Error on V-I (2)
79- 83 F5.2 mag AV Sumi (2004MNRAS.349..193S 2004MNRAS.349..193S) V-band extinction
85- 89 F5.2 mag AI Sumi (2004MNRAS.349..193S 2004MNRAS.349..193S) I-band extinction
91- 98 A8 --- Blazhko Label to indicate Blazhko phenomenology
100-103 F4.1 mmag Noise Typical noise level (3)
105-106 I2 --- M-IDs ?=0 Identifier (1-25) for the 25 stars with two
independent data sets (4)
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Note (2): If 0, there is no measurement of the V-I color at minimum light.
Note (3): For detection of additional frequency (Blazhko) peaks.
Note (4): If 0, only one data set exists for the star.
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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- 2 I2 --- Field Field identifier (BUL_SC + number)
4- 9 I6 --- OGLE Catalog number from Udalski et al.
(2002, Cat. J/AcA/52/217) (G1)
11- 18 A8 --- Blazhko Label to indicate Blazhko phenomenology
20- 23 F4.1 mmag Noise Typical noise level (1)
25- 29 F5.1 mmag Limit Upper limit to the amplitude of a symmetrical
frequency triplet (2)
31- 35 F5.1 10-3/d Delf1 First frequency offsets (3)
37- 41 F5.1 mmag A1 Amplitude of Delf1
43- 47 F5.1 10-3/d Delf2 Second frequency offset (3)
49- 53 F5.1 mmag A2 Amplitude of Delf2
55- 59 F5.1 10-3/d Delf3 Third frequency offset (3)
61- 65 F5.1 mmag A3 Amplitude of Delf3
67- 71 F5.1 10-3/d Delf4 Forth frequency offset (3)
73- 77 F5.1 mmag A4 Amplitude of Delf4
79- 83 F5.1 10-3/d Delf5 Fifth frequency offset (3)
85- 89 F5.1 mmag A5 Amplitude of Delf5
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Note (1): For detection of additional frequency (Blazhko) peaks.
Note (2): For stars identified as BL1 in Label only.
Note (3): From the main pulsation frequency of additional significant
frequencies detected within 0.1cycle/day of the main pulsation
frequency, ranked in order of descending amplitude.
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Global notes:
Note (G1): Nomenclature note:
Objects identified as OGLE BUL-SCNN NNNNNN in Simbad
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 22-Jul-2008