J/A+A/616/A118 Lensed QSOs light curves & spectral monitoring (Gil-Merino+ 2018)
New database for a sample of optically bright lensed quasars in the northern
hemisphere.
Gil-Merino R., Goicoechea L.J., Shalyapin V.N., Oscoz A.
<Astron. Astrophys. 616, A118 (2018)>
=2018A&A...616A.118G 2018A&A...616A.118G (SIMBAD/NED BibCode)
ADC_Keywords: Gravitational lensing ; QSOs ; Photometry, CCD ; Spectroscopy
Keywords: astronomical databases: miscellaneous -
gravitational lensing: strong - gravitational lensing: micro -
galaxies: general - quasars: general - cosmological parameters
Abstract:
In the framework of the Gravitational LENses and DArk MAtter
(GLENDAMA) project, we present a database of nine gravitationally
lensed quasars (GLQs) that have two or four images brighter than
r=20mag and are located in the northern hemisphere. This new database
consists of a rich variety of follow-up observations included in the
GLENDAMA global archive, which is publicly available online and
contains 6557 processed astronomical frames of the nine lens systems
over the period 1999-2016. In addition to the GLQs, our archive also
incorporates binary quasars, accretion-dominated radio-loud quasars,
and other objects, where about 50% of the non-GLQs were observed as
part of a campaign to identify GLQ candidates. Most observations of
GLQs correspond to an ongoing long-term macro-programme with 2-10m
telescopes at the Roque de los Muchachos Observatory, and these data
provide information on the distribution of dark matter at all scales.
We outline some previous results from the database, and we
additionally obtain new results for several GLQs that update the
potential of the tool for astrophysical studies.
Description:
As part of the Gravitational LENses and DArk MAtter (GLENDAMA)
project, we mainly used the 2.0m Liverpool Telescope (LT) to monitor
five optically bright lensed quasars in the SDSS-r passband. This
allowed us to construct accurate r-band light curves for these
multiple quasars (see below for a list of observed objects).
Table 4 includes the brightness of the two images of QSO B0909+532 on
344 observing nights over the period 2005-2016. In this table, we put
together our previous (Goicoechea et al. 2008NewA...13..182G 2008NewA...13..182G, Hainline
et al. 2013ApJ...774...69H 2013ApJ...774...69H) and new LT r-band magnitudes in a
machine-readable ascii file, using MJD-50000 dates.
Table 5 contains photometric measurements for FBQS J0951+2635 on 66
nights in 2001-2016, incorporating data from a monitoring campaign at
the Maidanak Observatory in 2001-2006 (Shalyapin et al.
2009MNRAS.397.1982S 2009MNRAS.397.1982S), LT observations over 2009-2016 and a punctual
observation with the 2.5m Nordic Optical Telescope in 2010.
Table 6 shows r-band magnitudes of the two images of QSO B0957+561 at
1067 observing epochs covering a 21-year period from 1996 to 2016. All
observations before 2005 were performed with the IAC-80 Telescope
(Serra-Ricart et al. 1999), while the vast majority of data in the
period 2005-2016 correspond to our LT monitoring programme (Shalyapin
et al. 2008A&A...492..401S 2008A&A...492..401S).
Table 15 displays the LT r-band variability database of the four
images of QSO B1413+117 (Cloverleaf quasar) in 2006 and 2013-2016.
These 33 new epochs complement the LT light curves in 2008 (Goicoechea
& Shalyapin 2010ApJ...708..995G 2010ApJ...708..995G).
Table 16 contains LT r-band magnitudes of the four images of QSO
B2237+0305 (Einstein Cross) on 185 observing nights in 2006-2016.
As part of the Gravitational LENses and DArk MAtter (GLENDAMA)
project, we used the 2.0 m Liverpool Telescope (LT) and the 2.5 m
Nordic Optical Telescope (NOT) to perform an optical spectroscopic
follow-up of two bright double quasars (see below).
Spatially resolved spectroscopy of QSO B0957+561 is presented in
Tables 8-11, where each table consists of a set of subtables, each one
corresponding to a different observing epoch.
Table 8 shows LT/FRODOSpec (red grating) spectra of the two quasar
images and the main lensing galaxy at 16 epochs covering the period
from 2010 through 2014, while Table 9 displays LT/SPRAT quasar spectra
at 5 epochs in 2015-2017. NOT/ALFOSC quasar spectra at 3 epochs in
2010-2013 are also included in Table 10 (grism#7) and 11 (grism#14).
Our LT spectroscopic follow-up of SDSS J1001+5027 led to quasar
spectra at 7 observing epochs. Tables 13 and 14 contain spectra from
FRODOSpec (red grating; 3 epochs in 2013-2014) and SPRAT (4 epochs in
2015-2016), respectively.
Extended (updated) results are also available at the project website:
https://grupos.unican.es/glendama/LQLM_results.htm.
Objects:
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RA (2000) DE Designation(s) Image
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09 13 01.05 +52 59 28.8 QSO B0909+532 = QSO B0909+5312 AB
09 51 22.57 +26 35 14.1 FBQS J0951+2635 = FBQS J0951+2635 AB
10 01 20.78 +55 53 49.4 QSO B0957+561 = QSO J1001+5553 AB
14 15 46.40 +11 29 41.4 QSO B1413+117 = QSO J1415+1129 ABCD
22 40 30.34 +03 21 28.8 QSO B2237+0305 = QSO J2240+0321 ABCD
10 01 28.61 +50 27 56.9 SDSS J1001+5027 = [OIH2005] SDSS J1001+5027 AB
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File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
stars.dat 121 6 List of studied QSOs
listsp.dat 60 34 List of individual spectra
table4.dat 34 344 Light curves of QSO B0909+532 in the r band
table5.dat 34 66 Light curves of FBQS J0951+2635 in the r band
table6.dat 34 1067 Light curves of QSO B0957+561 in the r band
table15.dat 60 33 Light curves of QSO B1413+117 in the r band
table16.dat 73 185 Light curves of QSO B2237+0305 in the r band
sp/* . 34 Individual spectrum files for QSO B0957+561 and
SDSS J1001+5027
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See also:
https://grupos.unican.es/glendama/LQLM_results.htm : Project Home Page
Byte-by-byte Description of file: stars.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 h RAh Right ascension (J2000)
4- 5 I2 min RAm Right ascension (J2000)
7- 11 F5.2 s RAs Right ascension (J2000)
13 A1 --- DE- Declination sign (J2000)
14- 15 I2 deg DEd Declination (J2000)
17- 18 I2 arcmin DEm Declination (J2000)
20- 23 F4.1 arcsec DEs Declination (J2000)
25- 39 A15 --- Name QSO name
41- 44 A4 --- Img [ABCD ] Image
46- 56 A11 --- lc Name of the table with light curve data
58- 69 A12 --- sp1 Name of the tables with FRODOSpec spectra
71- 82 A12 --- sp2 Name of the tables with SPRAT spectra
84- 95 A12 --- sp3 Name of the tables with ALFOSC spectra
97-121 A25 --- SName Simbad name
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Byte-by-byte Description of file: listsp.dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- FileName Name of the file in subdirectory sp
14- 28 A15 --- Name Name of the QSO
(QSO B0957+561 or SDSS J1001+5027)
30- 38 A9 --- Inst Instrument
41- 49 A9 --- Range Wavelength range
51- 60 A10 "date" Obs.Date observation date
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Byte-by-byte Description of file: table4.dat table5.dat table6.dat
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Bytes Format Units Label Explanations
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1- 8 F8.3 d MJD Modified Julian Date (MJD-50000)
10- 15 F6.3 mag mA Magnitude of QSO B0909+532A
17- 21 F5.3 mag e_mA Error in magnitude of QSO B0909+532A
23- 28 F6.3 mag mB Magnitude of QSO B0909+532B
30- 34 F5.3 mag e_mB Error in magnitude of QSO B0909+532B
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Byte-by-byte Description of file: table15.dat table16.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 F8.3 d MJD Modified Julian Date (MJD-50000)
10- 15 F6.3 mag mA Magnitude of QSO B2237+0305A
17- 21 F5.3 mag e_mA Error in magnitude of QSO B2237+0305A
23- 28 F6.3 mag mB Magnitude of QSO B2237+0305B
30- 34 F5.3 mag e_mB Error in magnitude of QSO B2237+0305B
36- 41 F6.3 mag mC Magnitude of QSO B2237+0305C
43- 47 F5.3 mag e_mC Error in magnitude of QSO B2237+0305C
49- 54 F6.3 mag mD Magnitude of QSO B2237+0305D
56- 60 F5.3 mag e_mD Error in magnitude of QSO B2237+0305D
62- 67 F6.3 mag mS ? Magnitude of the control star S (1)
69- 73 F5.3 mag e_mS ? Error in magnitude of S (1)
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Note (1): Only in table16.dat.
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Byte-by-byte Description of file: sp/*
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 F8.3 0.1nm lambda Observed wavelength in Angstroms
10- 16 F7.3 0.1nW/m3 FA Flux of QSO B0957+561A or SDSS J1001+5027A
(10-17erg/cm2/s/Å)
18- 24 F7.3 0.1nW/m3 FB Flux of QSO B0957+561B or SDSS J1001+5027A
(10-17erg/cm2/s/Å)
26- 32 F7.3 0.1nW/m3 FGAL ? Flux of the main lensing galaxy
(10-17erg/cm2/s/Å) (1)
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Note (1): only for QSO B0957+561 FRODOSpec spectra (table8*.dat).
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Acknowledgements:
Luis J. Goicoechea, luis.goicoechea(a)unican.es
Universidad de Cantabria, Spain
(End) L.J. Goicoechea [Univ. Cantabria, Spain], P. Vannier [CDS] 23-May-2018