J/A+A/420/447 VRI photometry of lensed quasar QSO B2237+0305 (Vakulik+, 2004)
Color effects associated with the 1999 microlensing brightness peaks in
gravitationally lensed quasar Q2237+0305.
Vakulik V.G., Schild R., Dudinov V.N., Minakov A.A., Nuritdinov S.N.,
Tsvetkova V.S., Zheleznyak A.P., Konichek V.V., Sinelnikov I.Ye.,
Burkhonov O.A.,B.P.Artamonov, Bruevich V.V.
<Astron. Astrophys. 420, 447 (2004)>
=2004A&A...420..447V 2004A&A...420..447V
ADC_Keywords: QSOs ; Gravitational lensing ; Magnitudes
Keywords: cosmology: gravitational lensing -
galaxies: quasars: individual: QSO 2237+0305 -
methods: observational - techniques: image processing
Description:
Spatially resolved CCD photometry of the Q2237+0305 gravitationally
lensed quasar in V, R and I spectral bands from observations with the
Maidanak 1.5-m telescope made in 1995-2000 is presented. For each of
the four quasar components, - A, B, C and D, - stellar magnitudes for
78 dates in R filter, and for 17 dates in V and I and shown in Tables
4-6. The color indices V-R and V-I for 17 dates during 1995-2000 are
also presented (Table 7), which permitted to analyse a behavior of
colors of the lensed quasar images in microlensing, and to discover a
significant correlation between the color changes and magnitude
changes in the sense, that the components tend to become bluer as
their brightness increases.
Objects:
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RA (2000) DE Designation(s)
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22 40 30.3 +03 21 31 QSO J2240+0321 = QSO B2237+030
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 72 31 Photometry of Q2237+0305A,B,C,D in the R band
from observations in 1995-1999.
table5.dat 70 46 Photometry of Q2237+0305 A,B,C,D in the R band
from observation in 2000
table6.dat 64 51 VRI photometry of Q2237+0305 A,B,C,D, 1995-2000
table7.dat 50 17 Color indices (V-R) and (V-I) of Q2237+0305
components
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See also:
J/A+A/412/707 : Absorption-line systems in QSO - CoALS (Ryabinkov+, 2003)
J/ApJS/77/203 : QSO absorption systems (Junkkarinen+ 1991)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 10 A10 "YYYY/MM/DD" Obs.Date Observation date
12- 16 F5.2 mag RmagA R magnitude of the component A
18- 21 F4.2 mag e_RmagA The mean error for A magnitude
23- 27 F5.2 mag RmagB R magnitude of the component B
29- 32 F4.2 mag e_RmagB The mean error for B magnitude
34- 38 F5.2 mag RmagC R magnitude of the component C
40- 43 F4.2 mag e_RmagC The mean error for C magnitude
45- 49 F5.2 mag RmagD R magnitude of the component D
51- 54 F4.2 mag e_RmagD The mean error for D magnitude
56- 59 F4.2 arcsec FWHM Seeing, Full Width on Half Maximum
61- 66 A6 --- CCD CCD camera
68- 72 F5.3 arcsec/pix Scale Scale at the chip plane
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 10 A10 "YYYY/MM/DD" Obs.Date Date of observation
12- 17 F6.3 mag RmagA R magnitude of the component A
19- 23 F5.3 mag e_RmagA The mean error for A magnitude
25- 30 F6.3 mag RmagB R magnitude of the component B
32- 36 F5.3 mag e_RmagB The mean error for B magnitude
38- 43 F6.3 mag RmagC R magnitude of the component C
45- 49 F5.3 mag e_RmagC The mean error for C magnitude
51- 56 F6.3 mag RmagD R magnitude of the component D
58- 62 F5.3 mag e_RmagD The mean error for C magnitude
64- 67 F4.2 arcsec FWHM Seeing, Full Width on Half Maximum
69- 70 I2 --- NFrame Number of frames in series
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 10 A10 "YYYY/MM/DD" Obs.Date Date of observation
12- 17 F6.3 mag magA Magnitude of component A in Band "Band"
19- 23 F5.3 mag e_magA The mean error for A component
25- 30 F6.3 mag magB Magnitude of component B in Band "Band"
32- 36 F5.3 mag e_magB The mean error for B component
38- 43 F6.3 mag magC Magnitude of component C in Band "Band"
45- 49 F5.3 mag e_magC The mean error for C component
51- 56 F6.3 mag magD Magnitude of component D in Band "Band"
58- 62 F5.3 mag e_magD The mean error for D component
64 A1 --- Band [VRI] Spectral band
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 10 A10 "YYYY/MM/DD" Obs.Date Date of observation
12- 15 F4.2 mag (V-R)A Color-index (V-R) for component A
17- 20 F4.2 mag (V-I)A Color-index (V-I) for component A
22- 25 F4.2 mag (V-R)B Color-index (V-R) for component B
27- 30 F4.2 mag (V-I)B Color-index (V-I) for component B
32- 35 F4.2 mag (V-R)C Color-index (V-R) for component C
37- 40 F4.2 mag (V-I)C Color-index (V-I) for component C
42- 45 F4.2 mag (V-R)D Color-index (V-R) for component D
47- 50 F4.2 mag (V-I)D Color-index (V-I) for component D
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Acknowledgements: Victor Vakulik
(End) Patricia Bauer [CDS] 23-Mar-2004