J/A+A/455/L1 Variability of 5 gravitationally lensed QSOs (Paraficz+, 2006)
Microlensing variability in time-delay quasars.
Paraficz D., Hjorth J., Burud I., Jakobsson P., Eliasdottir A.
<Astron. Astrophys. 455, L1 (2006)>
=2006A&A...455L...1P 2006A&A...455L...1P
ADC_Keywords: QSOs ; Gravitational lensing ; Photometry
Keywords: gravitational lensing
Abstract:
We have searched for microlensing variability in the light curves of
five gravitationally lensed quasars with well-determined time delays:
SBS 1520+530, FBQ 0951+2635, RX J0911+0551, B1600+434 and HE
2149-2745. By comparing the light curve of the leading image with a
suitably time offset light curve of a trailing image we find that two
(SBS 1520+530 and FBQ 0951+2635) out of the five quasars have
significant long-term (∼ years) and short-term (∼100-days) brightness
variations that may be attributed to microlensing. The short-term
variations may be due to nanolenses 10-4-10-3M☉,
relativistic hot or cold spots in the quasar accretion disks, or
coherent microlensing at large optical depth.
Description:
Photometric parameters for five gravitationally lensed quasars
obtained at the Nordic Optical Telescope: SBS 1520+530, FBQ 0951+2635,
RXJ 0911+0551, B1600+434, HE 2149-2745 are presented. For each quasar
image magnitudes and magnitude error are given.
Objects:
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RA (2000) DE Designation(s) (file)
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21 52 07.5 -27 31 50 HE 2149-2745 = QSO B2149-2745 (table[34])
09 11 27.5 +05 50 52 RX J0911+0551 = QSO J0911+0551 (table5.dat)
15 21 44.8 +52 54 49 SBS 1520+530 = QSO B1520+530 (table6.dat)
16 01 40.5 +43 16 47 B1600+434 = QSO B1600+4344 (table7.dat)
09 51 22.5 +26 35 14 FBQ 0951+2635 = FBQS J0951+2635 (table8.dat)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 77 40 Phototmetric parameters for two image of quasar
HE 2149-2745 in I-band
table4.dat 78 57 Phototmetric parameters for two image of quasar
HE 2149-2745 in V-band
table5.dat 78 74 Phototmetric parameters for two image of quasar
RX J0911+0551 in I-band
table6.dat 78 58 Phototmetric parameters for two image of quasar
SBS 1520+530 in R-band
table7.dat 78 41 Phototmetric parameters for two image of quasar
B1600+434 in I-band
table8.dat 112 58 Phototmetric parameters for two image of quasar
FBQ 0951+2635 in R-band
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See also:
J/A+A/391/481 : R-band photometry of SBS1520+530 (Burud+, 2002)
J/A+A/420/447 : VRI photometry of lensed quasar QSO B2237+0305 (Vakulik+, 2004)
J/ApJ/409/28 : Gravitationally Lensed Quasars (Maoz + 1993)
Byte-by-byte Description of file: table[3-7].dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- QSO QSO name
15 A1 --- Band [IVR] Photometric band
17- 27 F11.8 mag magA Differential magnitude of A component
29- 40 F12.10 mag e_magA Error on magA
42- 52 F11.8 mag magB Differential magnitude of B component
55- 66 F12.10 mag e_magB Error on magB
69- 78 F10.2 d JD Julian date
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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- 13 A13 --- QSO QSO name
15 A1 --- Band [R] Photometric band
17- 25 F9.6 mag magA Magnitude of A component
28- 36 F9.6 mag magB Magnitude of B component
39- 47 F9.7 mag e_magA Magnitude error of A component
49- 57 F9.7 mag e_magB Magnitude error of B component
59- 67 F9.6 mag mag1 Magnitude of reference star
69- 79 F11.9 mag e_mag1 Magnitude error of reference star
81- 89 F9.6 mag mag2 Magnitude of reference star
91-101 F11.9 mag e_mag2 Magnitude error of reference star
103-112 F10.2 d JD Julian date
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Acknowledgements: Danka Paraficz, danka(at)not.iac.es
References:
Burud et al., HE 2149-2745 2002A&A...383...71B 2002A&A...383...71B
Hjorth et al., RX J0911.4+0551 2002ApJ...572L..11H 2002ApJ...572L..11H
Burud et al., SBS 1520+530 2002A&A...391..481B 2002A&A...391..481B, Cat. J/A+A/391/481
Burud et al., B1600+434 2000ApJ...544..117B 2000ApJ...544..117B
Jakobsson et al., FBQ 0951+2635 2005A&A...431..103J 2005A&A...431..103J
(End) Patricia Vannier [CDS] 24-Apr-2006