J/MNRAS/495/1291 SuGOHI. V. Group-to-cluster scale lens search (Jaelani+, 2020)
Survey of Gravitationally lensed Objects in HSC Imaging (SuGOHI)
V. Group-to-cluster scale lens search from the HSC-SSP Survey.
Jaelani A.T., More A., Oguri M., Sonnenfeld A., Suyu S.H., Rusu C.E.,
Wong K.C., Chan J.H.H., Kayo I., Lee C.-H., Chao D.C.-Y., Coupon J.,
Inoue K.T., Futamase T.
<Mon. Not. R. Astron. Soc., 495, 1291-1310 (2020)>
=2020MNRAS.495.1291J 2020MNRAS.495.1291J (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Gravitational lensing ; Redshifts ; Optical ;
Surveys
Keywords: gravitational lensing: strong - methods: observational - surveys -
galaxies: clusters: general
Abstract:
We report the largest sample of candidate strong gravitational lenses
belonging to the Survey of Gravitationally lensed Objects in HSC
Imaging for group-to-cluster scale (SuGOHI-c) systems. These
candidates are compiled from the S18A data release of the Hyper
Suprime-Cam Subaru Strategic Program (HSC-SSP) Survey. We visually
inspect ∼39500 galaxy clusters, selected from several catalogues,
overlapping with the Wide, Deep, and UltraDeep fields, spanning the
cluster redshift range of 0.05<zcl<1.38. We discover 641 candidate
lens systems, of which 536 are new. From the full sample, 47 are
almost certainly bona fide lenses, 181 of them are highly probable
lenses, and 413 are possible lens systems. Additionally, we present
131 lens candidates at galaxy scale serendipitously discovered during
the inspection. We obtained spectroscopic follow-up of 10 candidates
using the X-shooter. With this follow-up, we confirm eight systems as
strong gravitational lenses. Of the remaining two, one of the sources
is too faint to detect any emission, and the other has a tentative
redshift close to the lens redshift, but additional arcs in this
system are yet to be observed spectroscopically. Since the HSC-SSP is
an ongoing survey, we expect to find ∼600 definite or probable lenses
using this procedure and even more if combined with other lens finding
methods.
Description:
The Subaru Strategic Program (SSP) survey is carried out with the
Hyper Suprime-Cam (HSC, Coupon et al. 2018PASJ...70S...7C 2018PASJ...70S...7C; Furusawa et
al. 2018PASJ...70S...3F 2018PASJ...70S...3F; Huang et al. 2018PASJ...70S...6H 2018PASJ...70S...6H; Kawanomoto
et al. 2018PASJ...70S...2K 2018PASJ...70S...2K; Komiyama et al. 2018PASJ...70S...2K 2018PASJ...70S...2K;
Miyazaki et al. 2018PASJ...70S...1M 2018PASJ...70S...1M), a 1.7deg2 field-of-view
optical camera recently installed on the 8.2-m Subaru telescope. The
HSC-SSP Survey has three fields: the Wide field is expected to cover a
1400deg2 area in five bands (g, r, i, z, and y) to an i-band depth
of 26.2 by its completion, while the Deep+UltraDeep fields are
expected to cover smaller areas of about 27deg2 and 3.5deg2. We
use the photometric data from the S18A data release, which covers
1114deg2 (out of which 305deg2 is full depth) in Wide and 31deg2
in Deep+UltraDeep, at least in one filter and one exposure (Aihara et
al. 2019PASJ...71..114A 2019PASJ...71..114A).
The redshifts used in this work are obtained from the photometric
redshift catalogue of the HSC-SSP Survey, determined using the Direct
Empirical Photometric code (DEmP, Hsieh & Yee 2014ApJ...792..102H 2014ApJ...792..102H).
The HSC-SSP photometric redshifts are most accurate at
0.2~<zphot~<1.5.
Since the HSC-SSP Survey footprint has some overlap with that of the
Sloan Digital Sky Survey (SDSS), we also extracted spectroscopic
redshifts, whenever available, from the SDSS Data Release 15 (Aguado
et al. 2019ApJS..240...23A 2019ApJS..240...23A) catalogues.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table3.dat 79 228 SuGOHI-c candidates, with grades A and B,
selected by visual inspection of galaxy cluster
catalogues
table4.dat 35 12 Summary of X-shooter spectroscopic observations
tablea2.dat 74 41 Extra lens candidates at galaxy scales
discovered serendipitously
refs.dat 65 19 References for Table 3 and Table A2
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Byte-by-byte Description of file: table3.dat tablea2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 14 A14 --- Name System name (JHHMM+DDMM)
16- 17 A2 --- f_Name Flag on Name (G1)
19- 26 F8.4 deg RAdeg Right ascension (J2000)
28- 34 F7.4 deg DEdeg Declination (J2000)
36- 39 F4.2 --- zphot Photometric redshift
41- 45 F5.3 --- zspec ? Spectroscopic redshift
47- 51 F5.2 arcsec Rarc Arc radius
53- 56 F4.2 --- Rank Rank (1)
58- 61 F4.2 --- s_Rank Standard deviation on Rank
63 A1 --- Grade [AB] Qualitative grade (2)
65- 70 A6 --- PC Parent catalogue
72- 79 A8 --- Ref References from previous studies
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Note (1): Nine inspectors independently assigned a rank from 0 to 3, according
to the following criteria:
3: almost certainly a lens
2: probably a lens
1: possibly a lens
0: not a lens
Where we give the mean rank given by individual inspectors
Note (2): Qualitative grade as follows:
A = Rank>2.5
B = 1.5<Rank=<2.5
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Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 14 A14 --- Name System name (JHHMM+DDMM)
16- 25 A10 --- Date Observation date
27- 29 I3 deg PA [] Position angle
31- 35 F5.3 --- zs ? Source redshift
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- Ref [1/19] Reference number
4- 22 A19 --- BibCode BibCode
24- 48 A25 --- Aut Author's name
50- 65 A16 --- Com Comments
--------------------------------------------------------------------------------
Global Notes:
Note (G1): Flag as follows:
a = Lens candidate that has red-coloured sources
b = Lens candidate with an X-shooter follow-up
c = Spectroscopically confirmed lens
d = Previously discovered lens
e = Known lens
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History:
From electronic version of the journal
References:
Sonnenfeld et al., Paper I 2018PASJ...70S..29S 2018PASJ...70S..29S
Wong et al., Paper II 2018ApJ...867..107W 2018ApJ...867..107W, Cat. J/ApJ/867/107
Sonnenfeld et al., Paper III 2019A&A...630A..71S 2019A&A...630A..71S
Chan et al., Paper IV 2020A&A...636A..87C 2020A&A...636A..87C
Sonnenfeld et al., Paper VI 2020A&A...642A.148S 2020A&A...642A.148S, Cat. J/A+A/642/A148
Jaelani et al., Paper VII 2021MNRAS.502.1487J 2021MNRAS.502.1487J
Wong et al., Paper VIII 2022PASJ...74.1209W 2022PASJ...74.1209W, Cat. J/PASJ/74/1209
(End) Ana Fiallos [CDS] 12-Jun-2023