J/AJ/166/101 SFACT. II. SFF01 -10 and -15 emission line objects (Sieben+, 2023)
The Star Formation Across Cosmic Time (SFACT) Survey.
II. The First Catalog from a New Narrowband Survey for Emission-line Objects.
Sieben J., Carr D.J., Salzer J.J., Hirschauer A.S.
<Astron. J., 166, 101 (2023)>
=2023AJ....166..101S 2023AJ....166..101S
ADC_Keywords: Star Forming Region; Galaxies, Seyfert; Galaxies, dwarf;
Photometry, VRI
Keywords: Galaxy evolution ; Emission line galaxies ; Starburst galaxies
; Surveys ; Star formation ; Galaxy Abundances ; Spiral
galaxies ; Blue compact dwarf galaxies ; Seyfert galaxies ;
Dwarf galaxies ; Quasars
Abstract:
Star Formation Across Cosmic Time (SFACT) is a new narrowband (NB)
survey designed to detect faint emission-line galaxies (ELGs) and QSOs
over a broad range of redshifts. Here we present the first list of
SFACT candidates from our pilot-study fields. Using the WIYN 3.5m
telescope, we are able to achieve good image quality with excellent
depth and routinely detect ELGs to r=25.0. The limiting line flux of
the survey is ∼1.0x10-16erg/s/cm2. SFACT targets three primary
emission lines: Hα, [OIII] λ5007, and [OII] λ3727.
The corresponding redshift windows allow for the detection of objects
at z∼0-1. With a coverage of 1.50deg2 in our three pilot-study
fields, a total of 533 SFACT candidates have been detected (355
candidates deg-2). We detail the process by which these candidates are
selected in an efficient and primarily automated manner, then tabulate
accurate coordinates, broadband photometry, and NB fluxes for each
source.
Description:
All survey imaging data were acquired using the One Degree Imager
(ODI) on the WIYN 3.5m telescope sited at Kitt Peak, Arizona. ODI
consists of 30 orthogonal transfer array (OTA) CCDs, each of which
comprises 64480x496pixel cells. All survey fields are observed through
six filters: three BB filters (gri) and three NB filters. The BB data
were obtained through g, r, and i filters ∼1500Å in width. The BB
bandpasses mimic the Sloan Digital Sky Survey (SDSS) filters.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 140 132 *SFF01 Emission-Line Objects
table3.dat 140 216 *SFF10 Emission-Line Objects
table4.dat 140 185 *SFF15 Emission-Line Objects
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Note on table2.dat table3.dat and table4.dat: All magnitudes and
fluxes are the observed values. No corrections for Galactic absorption
have been applied. Additionally, no corrections have been applied to
the emission-line flux, either for any additional emission lines that
might be present in the NB filter (e.g., [NII] emission) or for
bandpass corrections.
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See also:
III/116 : Spectrophotometric Standards (Massey+ 1988)
I/337 : Gaia DR1 (Gaia Collaboration, 2016)
J/ApJ/668/853 : Spectro UltraStrong Emission Line galaxies (Kakazu+, 2007)
J/ApJS/178/247 : Hα and [NII] survey in local 11 Mpc (Kennicutt+, 2008)
J/AJ/139/279 : Outlying HII regions in HI-selected galaxies (Werk+, 2010)
J/AJ/143/145 : Emission-line objects from ALFALFA Hα (Kellar+, 2012)
J/MNRAS/428/1128 : UDS/COSMOS HiZELS galaxies (Sobral+, 2013)
J/ApJ/844/171 : Lyα profile in 43 Green Pea galaxies (Yang+, 2017)
J/ApJ/880/7 : Census of Local Universe survey. I. CLU-Halpha (Cook+, 2019)
J/AJ/160/242 : The Hα dots survey. II. 119 new dots (Salzer+, 2020)
Byte-by-byte Description of file: table[234].dat
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Bytes Format Units Label Explanations
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1- 16 A16 --- ObjID SFACT Object identifier (1)
18- 42 A25 --- CooID SFACT Coordinate identifier (2)
44- 45 I2 h RAh Hour of Right Ascension (J2000) (3)
47- 48 I2 min RAm Minute of Right Ascension (J2000) (3)
50- 54 F5.2 s RAs Second of Right Ascension (J2000) (3)
56- 57 I2 deg DEd Degree of Declination (J2000) (3)
59- 60 I2 arcmin DEm Arcminute of Declination (J2000) (3)
62- 65 F4.1 arcsec DEs Arcsecond of Declination (J2000) (3)
67- 71 F5.2 mag Deltam Magnitude difference between narrow-band &
continuum images
73- 76 F4.2 mag e_Deltam Uncertainty in Deltam
78- 82 F5.2 --- ratio Ratio of Deltam and its uncertainty
84- 87 A4 --- Type Object type assigned during selection
process (4)
89- 94 F6.3 mag rmag Apparent r band AB magnitude
96-100 F5.3 mag e_rmag Uncertainty in rmag
102-107 F6.3 mag imag ? Apparent i band AB magnitude
109-113 F5.3 mag e_imag ? Uncertainty in imag
115-120 F6.3 mag gmag Apparent g band AB magnitude
122-126 F5.3 mag e_gmag Uncertainty in gmag
128-134 F7.3 [mW/m2] logFNB log narrow-band filter flux; erg/s/cm2
136-140 F5.3 [mW/m2] e_logFNB Uncertainty in logFNB
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Note (1): The unique identifier by which we refer to any candidate. This ID is
made up of the field name, the filter designation, the quadrant in
which the object was found, and a running number which is assigned
in the initial object detection stage.
Note (2): An alternate coordinate-based designation, using IAU-approved
nomenclature.
Note (3): On the Gaia astrometric system.
Note (4): Three types of objects are identified: HII regions in an
extended galaxy (marked as HII), the centers of any extended
galaxy (ExtG), and generic emission-line objects (ELG).
See the text for a detailed explanation.
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History:
From electronic version of the journal
References:
Salzer et al. Paper I : 2023AJ....166...81S 2023AJ....166...81S
Carr et al. Paper III : 2023AJ....166..102C 2023AJ....166..102C
(End) Prepared by [AAS], Coralie Fix [CDS], 21-Mar-2024