J/ApJ/909/129 HectoMAP redshift survey DR1 (Sohn+, 2021)
The HectoMAP redshift survey: first data release.
Sohn J., Geller M.J., Hwang Ho S., Fabricant D.G., Moran S.M., Utsumi Y.
<Astrophys. J., 909, 129 (2021)>
=2021ApJ...909..129S 2021ApJ...909..129S
ADC_Keywords: Galaxies, spectra; Redshifts; Photometry, SDSS; Colors; Surveys
Keywords: Redshift surveys ; Large-scale structure of the universe ;
Galaxy clusters
Abstract:
HectoMAP is a dense, red-selected redshift survey to a limiting
r=21.3mag covering 55deg2 in a contiguous 1.5° strip across the
northern sky. This region is also covered by the Subaru/Hyper
Suprime-Cam (HSC) Subaru Strategic Program photometric survey enabling
a range of applications that combine a dense foreground redshift
survey with both strong and weak lensing maps. The median redshift of
HectoMAP exceeds 0.3 throughout the survey region, and the mean
density of the redshift survey is ∼2000 galaxies deg-2. Here we
report a total of 17,313 redshifts in a first data release covering
8.7deg2. We include the derived quantities Dn4000 and stellar mass
for nearly all of the objects. Among these galaxies, 8117 constitute a
79% complete red-selected subsample with r≤20.5mag, and an additional
4318 constitute a 68% complete red-selected subsample with
20.5<r(mag)<21.3. As examples of the strengths of HectoMAP data, we
discuss two applications: refined membership of redMaPPer
photometrically selected clusters and a test of HSC photometric
redshifts. We highlight a remarkable redMaPPer strong lensing system.
The comparison of photometric redshifts with spectroscopic redshifts
in a dense survey uncovers subtle systematic issues in the photometric
redshifts.
Description:
In 2009 we observed the GTO2deg2 field as a test of the feasibility
of the HectoMAP project. We acquired 4405 redshifts (out of 4541) with
Hectospec covering this 2.1deg2 field (Kurtz+ 2012, J/ApJ/750/168),
which overlaps slightly with HectoMAP DR1.
The SDSS provides the photometric basis for HectoMAP. Because
observations for HectoMAP extend over 10yr, we used the SDSS data
releases beginning with DR7 (See II/294) and progressing to DR9
(see V/139). We have now updated all of the catalogs to SDSS DR16
(see V/154), the basis for all of the quantities quoted here.
See Section 2.1.
The HectoMAP region is included in the Wide portion of the Subaru/HSC
SSP. The first public HSC SSP data release (Aihara+ 2018PASJ...70S...4A 2018PASJ...70S...4A)
includes 4.7deg2 of the HectoMAP region. See Section 2.2.
We measured redshifts with the 300-fiber Hectospec mounted on the MMT
6.5m telescope from 2009 to 2019. Hectospec deploys 300 fibers over a
1° diameter field of view and covers the wavelength range of
3700-9100Å. Over the 10-year survey we revisited each position in
the entire survey ∼10 times. In the DR1 region, the typical number
of revisits is ∼9. See Section 2.3.
We use cosmological parameters Ωm=0.3, ΩΛ= 0.7,
and H0=70km/s/Mpc throughout.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 127 17320 HectoMAP DR1 catalog
table4.dat 84 23 redMaPPer clusters in HectoMAP DR1
table5.dat 61 524 Spectroscopically identified stars in HectoMAP DR1
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See also:
II/294 : The SDSS Photometric Catalog, Release 7 (Adelman-McCarthy+, 2009)
VII/86 : Groups of Galaxies. I. Nearby Groups (Huchra+ 1982)
VII/203 : Las Campanas Redshift Survey (Shectman+ 1996)
VII/250 : The 2dF Galaxy Redshift Survey (2dFGRS) (2dFGRS Team, 1998-2003)
V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)
V/154 : Sloan Digital Sky Surveys (SDSS), Release 16 (DR16) (Ahumada+, 2020)
J/AJ/123/2976 : The UZC-SSRS2 group catalog (Ramella+, 2002)
J/AJ/127/1943 : KISS Hα survey list 2 (Gronwall+, 2004)
J/AJ/132/1275 : CIRS (Cluster Infall Regions in the SDSS). I. (Rines+, 2006)
J/ApJ/669/714 : Subaru weak-lensing survey. I. (Miyazaki+, 2007)
J/ApJS/184/218 : The zCOSMOS 10k-bright spectroscopic sample (Lilly+, 2009)
J/ApJS/200/8 : AGES: the AGN and Galaxy Evolution Survey (Kochanek+, 2012)
J/ApJ/750/168 : Redshift survey in Subaru GTO2deg2 field (Kurtz+, 2012)
J/MNRAS/431/2111 : BUDHIES I. redshifts and EW[OII] (Jaffe+, 2013)
J/ApJ/767/15 : Hectospec Cluster Survey (HeCS) (Rines+, 2013)
J/ApJS/213/35 : SHELS: galaxy redshift survey for R≤20.6 (Geller+, 2014)
J/ApJ/785/104 : redMaPPer. I. Algorithm applied to SDSS DR8 (Rykoff+, 2014)
J/MNRAS/452/2087 : Galaxy And Mass Assembly (GAMA): DR2 (Liske+, 2015)
J/ApJS/220/12 : FMOS-COSMOS survey III. 0.7<z<2.5 gal. (Silverman+, 2015)
J/ApJS/224/11 : SHELS: redshift survey of the F1 DLS field (Geller+, 2016)
J/ApJ/819/63 : Hectospec survey of SZ clusters (HeCS-SZ) (Rines+, 2016)
J/ApJS/224/1 : redMaPPer cluster catalog from DES data (Rykoff+, 2016)
J/A+A/588/A14 : Friends-of-friends galaxy group finder (Tempel+, 2016)
J/ApJS/234/21 : Hectospec survey of galaxies in COSMOS (Damjanov+, 2018)
J/MNRAS/474/4151 : WiggleZ Dark Energy Survey final DR (Drinkwater+, 2018)
J/ApJ/862/172 : Hectospec surveys of redMaPPer clusters (Rines+, 2018)
J/ApJ/855/100 : The HectoMAP cluster survey. II. X-ray (Sohn+, 2018)
J/ApJ/856/172 : The HectoMAP cluster survey. I. (Sohn+, 2018)
J/ApJ/872/91 : SHELS galaxy sizes using Subaru/HSC (Damjanov+, 2019)
J/ApJ/880/142 : Spectroscopic members of COSMOS X-ray systems (Sohn+, 2019)
http://www.sdss.org/ : SDSS home page
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 19 I19 --- ObjID SDSS Object ID
21- 30 F10.6 deg RAdeg [242/250] Right Ascension (J2000)
32- 41 F10.6 deg DEdeg [42.5/44] Declination (J2000)
43- 47 F5.2 mag rmag [13/31.3] Apparent r-band petrosian (AB)
magnitude
49- 53 F5.2 mag e_rmag [0/52] Uncertainty in rmag
55- 59 F5.2 mag g-r [-1.7/16.3] The g-r color index (1)
61- 65 F5.2 mag r-i [-9.1/13.1] The r-i color index (1)
67- 73 F7.5 --- z [0.0066/3.02] Spectroscopic redshift
75- 81 F7.5 --- e_z [0/9] Uncertainty in z
83- 86 A4 --- r_z Source of z (2)
88- 93 F6.2 [Msun] logM* [7/12.5]?=-99 log stellar mass
95- 98 F4.2 [Msun] E_logM* [0.01/0.7]?=0 Upper uncertainty in logM*
100-103 F4.2 [Msun] e_logM* [0.01/0.8]?=0 Lower uncertainty in logM*
105-110 F6.2 --- Dn4000 [0.1/78]?=-99 Stellar population age indicator
112-117 F6.2 --- e_Dn4000 [0.01/630]?=-99 Uncertainty in Dn4000
119-122 A4 --- --- [HMRM]
123-127 I05 --- ClID [2042/50736]? redMaPPer membership
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Note (1): Foreground extinction-corrected model colors.
Note (2): Source as follows:
MMT = the 300-fiber Hectospec mounted on the MMT 6.5m telescope
(15738 occurrences)
BOSS = 702 occurrences
SDSS = 741 occurrences
YJ = 115 occurrences
NED = the NASA Extragalactic Database (including
Gronwall+ 2004, J/AJ/127/1943 and Jaffe+ 2013, J/MNRAS/431/2111);
24 occurrences
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 A4 --- --- [HMRM]
5- 9 I05 --- ClID [2042/50736] RedMaPPer cluster ID from
Sohn+, 2018, J/ApJ/856/172
(<[RRB2014] RM JHHMMSS.s+DDMMSS.s> in Simbad)
11- 20 F10.6 deg RAdeg [242.3/249.3] Right ascension (J2000)
22- 30 F9.6 deg DEdeg [42.5/44] Declination (J2000)
32- 33 I2 --- Nm [35/98] Number of member candidates with
Pmem>0
35- 36 I2 --- Nmsp [13/66] Number of candidates with spectroscopy
with Pmem>0
38- 39 I2 --- Mm [4/47] Spectroscopically identified members
with Pmem>0
41- 42 I2 --- Nm2 [17/53] Number of member candidates with
Pmem>0.5
44- 45 I2 --- Nmsp2 [5/46] Number of candidates with spectroscopy
with Pmem>0.5
47- 48 I2 --- Mm2 [2/40] Spectroscopically identified members
with Pmem>0.5
50- 51 I2 --- Nspec [6/63] Number of spectroscopically identified
members within
|Δcz/(1+zcl)|<2000km/s
53- 57 F5.2 --- lambda [20/69] Richness from the redMaPPer catalog
59- 63 F5.2 --- e_lambda [2/11] lambda uncertainty
65- 70 F6.4 --- zphot [0.14/0.6] Photometric redshift
72- 77 F6.4 --- e_zphot [0.004/0.02] zphot uncertainty
79- 84 F6.4 --- zspec [0.13/0.53] HectoMAP spectroscopic redshift
of the system
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 19 I19 --- ObjID SDSS Object ID
21- 30 F10.6 deg RAdeg [242/250] Right Ascension (J2000)
32- 41 F10.6 deg DEdeg [42.5/44] Declination (J2000)
43- 51 F9.5 --- z [-0.0016/0.0025] Spectroscopic redshift
53- 61 F9.5 --- e_z [0/0.0012] Uncertainty in z
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 10-Aug-2022