J/ApJ/880/7 Census of the Local Universe survey. I. CLU-Halpha (Cook+, 2019)
Census of the Local Universe (CLU) narrowband survey.
I. Galaxy catalogs from preliminary fields.
Cook D.O., Kasliwal M.M., Van Sistine A., Kaplan D.L., Sutter J.S.,
Kupfer T., Shupe D.L., Laher R.R., Masci F.J., Dale D.A., Sesar B.,
Brady P.R., Yan L., Ofek E.O., Reitze D.H., Kulkarni S.R.
<Astrophys. J., 880, 7 (2019)>
=2019ApJ...880....7C 2019ApJ...880....7C
ADC_Keywords: Galaxy catalogs; Photometry, H-alpha; Photometry, ugriz;
Photometry, ultraviolet; Spectra, optical; Redshifts; Surveys
Keywords: galaxies: Seyfert; galaxies: starburst; gravitational waves; surveys
Abstract:
We present the Census of the Local Universe (CLU) narrowband survey to
search for emission-line (Hα) galaxies. CLU-Hα has imaged
∼3π of the sky (26470deg2) with four narrowband filters that
probe a distance out to 200Mpc. We have obtained spectroscopic
follow-up for galaxy candidates in 14 preliminary fields (101.6deg2)
to characterize the limits and completeness of the survey. In these
preliminary fields, CLU can identify emission lines down to an
Hα flux limit of 10-14erg/s/cm2 at 90% completeness, and
recovers 83% (67%) of the Hα flux from cataloged galaxies in our
search volume at the Σ=2.5 (Σ=5) color excess levels. The
contamination from galaxies with no emission lines is 61% (12%) for
Σ=2.5 (Σ=5). Also, in the regions of overlap between our
preliminary fields and previous emission-line surveys, we recover the
majority of the galaxies found in previous surveys and identify an
additional ∼300 galaxies. In total, we find 90 galaxies with no
previous distance information, several of which are interesting
objects: 7 blue compact dwarfs, 1 green pea, and a Seyfert galaxy; we
also identify a known planetary nebula. These objects show that the
CLU-Hα survey can be a discovery machine for objects in our own
Galaxy and extreme galaxies out to intermediate redshifts. However,
the majority of the CLU-Hα galaxies identified in this work show
properties consistent with normal star-forming galaxies. CLU-Hα
galaxies with new redshifts will be added to existing galaxy catalogs
to focus the search for the electromagnetic counterpart to
gravitational wave events.
Description:
The Census of the Local Universe (CLU) emission-line (Hα) galaxy
survey (CLU-Ha) is a narrowband survey of the entire northern sky
above a decl. of -20°, with the aim of constraining galaxy
distances out to 200Mpc (z=0.047). We have imaged ∼3πsr of the sky
as part of the Intermediate Palomar Transient Factory (iPTF) with four
contiguous narrowband filters with a combined wavelength range of
6525-6878Å. The first filter (Ha1) is centered near the z=0 Hα
emission line (λ=6563Å), and the wavelength range of the
last filter extends to the z=0.047 (i.e., ∼200Mpc) Hα emission line.
Observations were taken on the Oschin 48 inch telescope at the Palomar
Observatory with a 7.92deg2 mosaic imager. Data acquisition ended in
2017 March. See Section 2.2.
Besides, we have obtained spectra for 334 candidates in the preliminary
fields with no redshift information. The spectra were taken with the
200 inch Hale telescope atop Palomar Mountain on multiple nights over
2016 and 2017 using the Double-Beam Spectrograph instrument (DBSP) and
on the 2.3 meter Wyoming Infra-red Observatory (WIRO) with the
Longslit spectrograph. See Section 3.4.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 513 793 All candidates in our preliminary fields
table2.fits 2880 127 Original Table 2 in FITS format
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See also:
VII/172 : First Byurakan Survey (FBS) (Markarian+, 1989)
I/284 : The USNO-B1.0 Catalog (Monet+ 2003)
V/127 : MASH Catalogues of Planetary Nebulae (Parker+ 2006-2008)
I/315 : UCAC3 Catalogue (Zacharias+ 2009)
VII/259 : 6dF galaxy survey final redshift release (Jones+, 2009)
II/313 : Palomar Transient Factory (PTF) photometric catalog 1.0 (Ofek+, 2012)
II/328 : AllWISE Data Release (Cutri+ 2013)
V/147 : The SDSS Photometric Catalogue, Release 12 (Alam+, 2015)
II/335 : Revised cat. of GALEX UV sources (GUVcat_AIS GR6+7) (Bianchi+ 2017)
J/AJ/118/1489 : Tully-Fisher peculiar vel. in 52 clusters (Dale+, 1999)
J/A+AS/135/511 : The Hamburg/SAO Survey for ELGs (Ugryumov+ 1999)
J/A+A/379/798 : ELAIS Hα emitting galaxies (Pascual+, 2001)
J/AJ/121/66 : KISS Hα survey list 1 (Salzer+, 2001)
J/AJ/127/1943 : KISS Hα survey list 2 (Gronwall+, 2004)
J/AJ/130/2571 : KISS Hα-selected survey list 3 (Jangren+, 2005)
J/ApJS/161/240 : High-ionization emission in BCDs (Thuan+, 2005)
J/AJ/134/579 : Galaxy morphologies from SDSS DR3 (Fukugita+, 2007)
J/ApJS/170/33 : Optical properties of Markarian galaxies (Petrosian+, 2007)
J/ApJS/178/247 : Hα and [NII] survey in local 11 Mpc (Kennicutt+, 2008)
J/ApJ/675/1459 : Compact Binary Coalescence Galaxy Catalog (Kopparapu+, 2008)
J/ApJ/703/517 : The Spitzer Local Volume Legacy: IR photometry (Dale+, 2009)
J/ApJ/714/1256 : Far-IR star formation rate indicators (Calzetti+, 2010)
J/MNRAS/404/1745 : Dwarf galaxies in Coma supercluster (Mahajan+, 2010)
J/AJ/142/170 : ALFALFA survey: α.40 HI source catalog (Haynes+, 2011)
J/ApJS/192/6 : A GALEX UV imaging survey of nearby galaxies (Lee+, 2011)
J/MNRAS/445/881 : LVL global optical photometry (Cook+, 2014)
J/MNRAS/445/899 : LVL SEDs and physical properties (Cook+, 2014)
J/ApJ/797/55 : WISE photometry of dust-free stellar systems (Norris+, 2014)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [CLU]
5- 23 A19 --- CLU Name of the candidate
(JHHMMSS.ss+DDMMSS.s) (CANDID)
25- 26 I2 --- Filt Narrow-band filter in which an emission line
is indicated (CANDFILT) (1)
28- 36 F9.5 deg RAdeg Right ascension (J2000) (RA)
38- 44 F7.4 deg DEdeg Declination (J2000) (DEC)
46- 52 F7.4 mag Ha1mag [12/19.2]?=- Ha1 band AB magnitude
54- 61 F8.5 mag e_Ha1mag [0.0018/0.3]?=- Ha1mag uncertainty (HA1MAGERR)
63- 69 F7.4 mag Ha2mag [12/19.3]?=- Ha2 band AB magnitude
71- 78 F8.5 mag e_Ha2mag [0.0019/0.4]?=- Ha2mag uncertainty (HA2MAGERR)
80- 86 F7.4 mag Ha3mag [12/19.7]?=- Ha3 band AB magnitude
88- 95 F8.5 mag e_Ha3mag [0.0019/0.2]?=- Ha3mag uncertainty (HA3MAGERR)
97- 103 F7.4 mag Ha4mag [12.1/19.4]?=- Ha4 band AB magnitude
105- 112 F8.5 mag e_Ha4mag [0.0018/0.3]?=- Ha4mag uncertainty (HA4MAGERR)
114- 123 F10.5 --- Csig1 [-150.2/77.6]?=0 Color sigma in the Ha1 filter
125- 135 F11.5 --- Csig2 [-1175/69.6]?=0 Color sigma in the Ha2 filter
137- 146 F10.5 --- Csig3 [-492/184.5]?=0 Color sigma in the Ha3 filter
148- 158 F11.5 --- Csig4 [-1050/38.7]?=0 Color sigma in the Ha4 filter
160- 168 F9.5 --- CsigMax [2.5/184.5] Maximum color sigma for all
4 filters (MAXCSIG)
170 I1 --- Cl-S [0/3] SDSS photometric classification
(0=unknown, 3=galaxy) (SDSSCLASS)
172 I1 --- Cl-V [1/2] Visual classification on the Ha images
(1=galaxy, 2=star) (VISCLASS)
174- 181 F8.3 0.1nm EWHa [-13/2414]?=0 Spectroscopic Hα
equivalent width in Angstrom units (HAEW)
183- 190 F8.3 0.1nm e_EWHa [0.038/1205]?=0 EWHa uncertainty (HAEWERR)
192- 201 E10.4 mW/m2 FHa [-1.4e-15/7.7e-13]?=0 Spectroscopic Hα
flux; in erg/s/cm2 units (HAFLUX)
203- 211 E9.4 mW/m2 e_FHa [4.8e-18/4e-9]?=0 FHa uncertainty (HAFLUXERR)
213- 222 E10.4 --- FHacont [-1.6e-17/2.1e-15]?=0 Spectroscopic continuum
flux of the Ha line; in erg/s/cm2 units
(HACONT)
224- 232 E9.4 --- e_FHacont [1.9e-19/2.8e-15]?=0 FHacont uncertainty
(HACONTERR)
234- 239 I6 --- PN [1]?=999999 Flag indicating object is a
planetary nebula (1= 1 occurrence) (PNEB)
241- 246 I6 --- BCD [1]?=999999 Flag indicating object is a
blue compact dwarf (1 = 10 occurrences)
248- 253 I6 --- GP [0/1]?=999999 Flag indicating object is a
green pea (1 = 1 occurrence) (GPEA)
255- 262 F8.6 --- QSO [0/1]?=0 Flag indicating object is a quasar
(1 = 1 occurrence)
264- 272 E9.4 Msun/yr SFR-FUV [0.002/1.8e+6]?=- Star formation rate from
GALEX FUV flux corrected for dust
using W4 flux (SFR_FUV)
274- 278 F5.2 Msun/yr e_SFR-FUV [0] SFR-FUV uncertainty (always "0")
(SFR_FUVERR)
280- 287 F8.5 Msun/yr SFR-Ha [0.001/96]?=- Star formation rate from CLU Ha
flux corrected for dust using W4 flux
(SFR_HA)
289- 298 E10.5 Msun/yr e_SFR-Ha [3.1e-5/49339]?=- SFR-Ha uncertainty
(SFR_HAERR)
300- 309 E10.5 Msun Mass [1.6e+6/9.2e+16]?=- Stellar mass (MSTAR) (2)
311- 320 E10.5 Msun e_Mass [39747/2.2e+15]?=- Mass uncertainty (MSTARERR)
322- 328 F7.4 mag umag [14.1/24.7]?=0 SDSS u-band model AB magnitude
(SDSSU_MODELMAG)
330- 335 F6.4 mag e_umag [0.003/3.8]?=0 Uncertainty on the umag
(SDSSUERR_MODELMAG)
337- 343 F7.4 mag gmag [12.3/25.2]?=0 SDSS g-band model AB magnitude
(SDSSG_MODELMAG)
345- 350 F6.4 mag e_gmag [0.0016/4.4]?=0 Uncertainty on the gmag
(SDSSGERR_MODELMAG)
352- 358 F7.4 mag rmag [11.5/25.3]?=0 SDSS r-band model AB magnitude
(SDSSR_MODELMAG)
360- 366 F7.4 mag e_rmag [0.0013/18]?=0 Uncertainty on the rmag
(SDSSRERR_MODELMAG)
368- 374 F7.4 mag imag [11.2/27.4]?=0 SDSS i-band model AB magnitude
(SDSSI_MODELMAG)
376- 382 F7.4 mag e_imag [0.0008/18.6]?=0 Uncertainty on the imag
(SDSSIERR_MODELMAG)
384- 390 F7.4 mag zmag [10.8/24.7]?=0 SDSS z-band model AB magnitude
(SDSSZ_MODELMAG)
392- 398 F7.4 mag e_zmag [0.0018/16.1]?=0 Uncertainty on the zmag
(SDSSZERR_MODELMAG)
400- 406 F7.4 mag NUVmag [14.4/22.6]?=- GALEX NUV magnitude (NUV)
408- 414 F7.5 mag e_NUVmag [0.007/0.4]?=- Uncertainty on NUVmag (NUVERR)
416- 422 F7.4 mag FUVmag [14.8/99]?=- GALEX FUV magnitude (FUV)
424- 432 F9.5 mag e_FUVmag [0.01/443]?=- Uncertainty on FUVmag (FUVERR)
434- 439 F6.3 mag W1mag [6.8/17.2]?=- WISE W1 (3.4um) band magnitude
(WISE1)
441- 446 F6.4 mag e_W1mag [0.02/0.4]?=- Uncertainty on W1mag (WISE1ERR)
448- 452 F5.3 mag W4mag [3.2/9.7]?=- WISE W4 (22um) band magnitude
(WISE4)
454- 459 F6.4 mag e_W4mag [0.01/0.6]?=0 Uncertainty on W4mag (WISE4ERR)
461- 469 F9.2 Mpc Dist [-2.4/412500] Distance using H0=72km/s/Mpc
(DISTMPC)
471- 479 F9.5 --- zSDSS [0.005/0.4]?=- SDSS spectroscopic redshift
481- 489 F9.5 --- zNED [0.002/0.09]?=- NED spectroscopic redshift
491- 502 F12.8 --- zCLU [-0.0006/0.4]?=- CLU spectroscopic redshift
from either Palomar or WIRO
504- 513 F10.6 --- zCOMB [-0.0006/0.4]?=- The final redshift used in
analysis assigned with the following
priority: SDSS, NED, CLU
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Note (1): Filter code as follows:
11 = Ha1: λ=6584.2Å, Δλ=76.1Å,
redshift range: -0.0026<z<0.0090
12 = Ha2: λ=6663.7Å, Δλ=77.9Å
redshift range: 0.0094<z<0.0213
13 = Ha3: λ=6730.9Å, Δλ=90.1Å
redshift range: 0.0187<z<0.0324
14 = Ha4: λ=6822.1Å, Δλ=92.1Å
redshift range: 0.0325<z<0.0471
Note (2): Stellar mass calculated from WISE1 flux using a mass-to-light
ratio of 0.5 (Msun/Lsun).
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History:
From electronic version of the journal
(End) Emmanuelle Perret [CDS] 16-Dec-2020