J/A+A/642/A193 Rc-band light curves of 6 lensed QSOs (Millon+, 2020)
TDCOSMO II: Six new time delays in lensed quasars from high-cadence monitoring
at the MPIA 2.2m telescope.
Millon M., Courbin F., Bonvin V., Buckley-Geer E., Fassnacht C.D.,
Frieman J., Marshall P.J., Suyu S.H., Treu T., Anguita T., Motta V.,
Agnello A., J.H.H.Chan, Chao D.C.-Y, Chijani M., Gilman D., Gilmore K.,
Lemon C., Lucey J.R., Melo A., Paic E., Rojas K., Sluse D., Williams P.R.,
Hempel A., Kim S., Lachaume R., Rabus M.
<Astron. Astrophys. 642, A193 (2020)>
=2020A&A...642A.193M 2020A&A...642A.193M (SIMBAD/NED BibCode)
ADC_Keywords: QSOs ; Gravitational lensing ; Photometry
Keywords: gravitational lensing: strong - methods: data analysis -
cosmological parameters
Abstract:
We present six new time-delay measurements obtained from Rc-band
monitoring data acquired at the MPIA 2.2m telescope at La Silla
observatory between October 2016 and February 2020. The lensed quasars
HE 0047-1756, WG 0214-2105, DES 0407-5006, 2M 1134-2103,
PSJ 1606-2333 and DES 2325-5229 were observed almost daily at high
signal-to-noise ratio to obtain high-quality light curves where we can
record fast and small-amplitude variations of the quasars. We measure
time delays between all pairs of multiple images with only one or two
seasons of monitoring at the exception of the time delays relative to
image D of PSJ 1606-2333. The most precise estimate is obtained for
the delay between image A and image B of DES 0407-5006, with
τAB=-128.4+3.5-3.8 days (2.8% precision) including
systematics due to extrinsic variability in the light curves. For
HE 0047-1756, we combine our high-cadence data with measurements from
decade-long light-curves from previous COSMOGRAIL campaigns, and reach
a precision of 0.9 day on the final measurement. The present work
demonstrates the feasibility of measuring time delays in lensed
quasars in only one or two seasons, provided high signal-to-noise
ratio data are obtained at a cadence close to daily.
Description:
R-band (filter #ESO844) light curves of lensed quasars. We obtain the
calibrated apparent magnitude in the R-filter from the PanSTARRS DR2
catalog. For the field of DES 2325-5229 and DES 0407-5006 which
are not covered by PanSTARRS, we use the R-magnitude from the Dark
Energy Survey (DES) Year-One catalog.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
list.dat 81 6 List of studied lensed quasars
2m1134.dat 83 164 Rc-band light curves of 2M 1134-2103
ps1606.dat 83 158 Rc-band light curves of PSJ 1606-2333
wg0214.dat 83 295 Rc-band light curves of WG 0214-2105
des0407.dat 49 174 Rc-band light curves of DES 0407-5006
des2325.dat 49 183 Rc-band light curves of DES 2325-5229
he0047.dat 49 185 Rc-band light curves of HE 0047-1756
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See also:
J/A+A/488/481 : Time delays and H0 from WFI J2033-4723 (Vuissoz+, 2008)
J/A+A/536/A53 : R-band light curves of HE 0435-1223 (Courbin+, 2011)
J/A+A/553/A121 : 2 lensed quasars light curves (Eulaers+, 2013)
J/A+A/556/A22 : R-band light curves of RX J1131-1231 (Tewes+, 2013)
J/A+A/557/A44 : Doubly lensed quasar SDSS J1001+5027 (Rathna Kumar+, 2013)
J/ApJ/806/258 : R-band light curves of SDSS J0924+0219(MacLeod+,2019)
J/MNRAS/465/4914 : R-band light curves of HE 0435-1223 (Bonvin+, 2017)
J/A+A/609/A71 : R-band light curves of DES J0408-5359 (Courbin+ 2018)
J/A+A/616/A183 : R-band light curves of PG 1115+080 (Bonvin+, 2018)
J/A+A/629/A97 : R-band light curves of WFI2033-4723(Bonvin+, 2019)
J/ApJ/873/117 : R-band light curves of SDSS J1515+1511(Shalyapin+, 2019)
J/A+A/640/A105 : R-band light curves of 23 lensed quasars (Millon+, 2020)
Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Name Name
15- 16 I2 h RAh Right ascension (J2000)
18- 19 I2 min RAm Right ascension (J2000)
21- 25 F5.2 s RAs Right ascension (J2000)
27 A1 --- DE- Declination sign (J2000)
28- 29 I2 deg DEd Declination (J2000)
31- 32 I2 arcmin DEm Declination (J2000)
34- 37 F4.1 arcsec DEs Declination (J2000)
39- 49 A11 ---- FileName Name of the table with photometry
50- 81 A32 --- SName Simbad name
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Byte-by-byte Description of file: 2m1134.dat ps1606.dat wg0214.dat
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Bytes Format Units Label Explanations
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1- 11 F11.5 d HJD Median Heliocentric Julian Date (HJD-2400000)
13- 20 F8.5 mag magA Rc magnitude of image A
22- 28 F7.5 mag e_magA Rc magnitude error of image A
30- 37 F8.5 mag magB Rc magnitude of image B
39- 45 F7.5 mag e_magB Rc magnitude error of image B
47- 54 F8.5 mag magC Rc magnitude of image C
56- 62 F7.5 mag e_magC Rc magnitude error of image C
64- 71 F8.5 mag magD Rc magnitude of image D
73- 79 F7.5 mag e_magD Rc magnitude error of image D
81- 83 A3 --- Tel [WFI] Instrument used for the observation
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Byte-by-byte Description of file: des0407.dat des2325.dat he0047.dat
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Bytes Format Units Label Explanations
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1- 11 F11.5 d HJD Median Heliocentric Julian Date (HJD-2400000)
13- 20 F8.5 mag magA Rc magnitude of image A
22- 28 F7.5 mag e_magA Rc magnitude error of image A
30- 37 F8.5 mag magB Rc magnitude of image B
39- 45 F7.5 mag e_magB Rc magnitude error of image B
47- 49 A3 --- Tel [WFI] Instrument used for the observation
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Acknowledgements:
Martin Millon, martin.millon(at)epfl.ch
References:
Millon et al., Paper I 2020A&A...639A...120M
(End) Martin Millon [EPFL, Switzerland], Patricia Vannier [CDS] 27-Aug-2020