J/ApJS/119/159 Deep survey of HI-selected galaxies (Spitzak+, 1998)
A deep survey of H I-selected Galaxies: the sample and the data.
Spitzak J.G., Schneider S.E.
<Astrophys. J. Suppl. Ser., 119, 159-180 (1998)>
=1998ApJS..119..159S 1998ApJS..119..159S
ADC_Keywords: Galaxies, photometry ; Galaxies, radio ; H I data
Keywords: galaxies: ISM - galaxies: photometry - radio lines: galaxies - surveys
Abstract:
In a 21cm neutral hydrogen survey of approximately 55°2 out to
a redshift of cz=8340km/s, we have identified 75 extragalactic HI
sources. These objects comprise a well-defined sample of extragalactic
sources chosen by means that are independent of optical surface
brightness selection effects. In this paper we describe the Arecibo
survey procedures and HI data, follow-up VLA HI observations made of
several unusual sources, and Kitt Peak B-, R-, and I-band photometry
for nearly all of the galaxies. We have also gathered information for
some of the optically detected galaxies within the same search volume.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 76 91 HI observations in Arecibo Slice
table3.dat 104 91 Optical counterparts to the HI-selected sample
table4.dat 95 91 Optical measurements of the HI-selected sample
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See also:
J/A+AS/116/43 : Emission-line galaxies nearby voids. (Popescu+, 1996)
J/ApJS/95/387 : Universidad Complutense de Madrid list 1 (Zamorano+ 1994)
J/AJ/129/1311 : J-band photometry of ADBS Galaxies (Rosenberg+, 2005)
VII/179 : Kiso Survey for UV-Excess Galaxies. XVIII (Takase+ 1993)
VII/172 : First Byurakan Survey (FBS) (Markarian+, 1989)
VII/190 : Zwicky Galaxy Catalog (Zwicky+ 1968)
VII/62 : Morphological Cat. of Gal. (MCG)
(Vorontsov-Velyaminov+, 1962-1974)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- [SS98c] HI observations in Arecibo slice number
3 A1 --- f_[SS98c] [*] Indicates a non-HI-selected source
4 A1 --- u_RAh [~] Uncertainty flag on Position
5- 6 I2 h RAh Hour of right ascension (B1950)
8- 9 I2 min RAm Minute of right ascension (B1950)
11- 14 F4.1 s RAs Second of right ascension (B1950)
16 A1 --- DE- Sign of the declination (B1950)
17- 18 I2 deg DEd Degree of declination (B1950)
20- 21 I2 arcmin DEm Arcminute of declination (B1950)
23- 24 I2 arcsec DEs Arcsecond of declination (B1950)
26 A1 --- u_cz [~] Uncertainty flag on cz
27- 30 I4 km/s cz Mean velocity of 50%-of-peak points in
profile
32 A1 --- u_W50 [~] Uncertainty flag on w50
33- 35 I3 km/s W50 ? Line width at 50% of peak (1)
37 A1 --- u_W20 [~] Uncertainty flag on w20
38- 40 I3 km/s W20 ? Line width at 20% of peak (1)
42 I1 --- Nh ? Number of horns (2)
44 A1 --- u_Sc(HI) [~] Uncertainty flag on Sc(HI)
45 A1 --- l_Sc(HI) [<] Limit flag on Sc(HI)
46- 53 A8 Jy.km/s Sc(HI) Central flux (3)
55 A1 --- u_St(HI) [~] Uncertainty flag on St(HI)
56- 60 F5.2 Jy.km/s St(HI) ? Total HI flux (4)
62 A1 --- u_Si(HI) [~] Uncertainty flag on Si(HI)
63- 67 F5.2 Jy.km/s Si(HI) ? Integrated flux (5)
69 A1 --- u_w20det [~] Uncertainty flag on w20det
70- 72 I3 km/s w20det ? Line width at 20% (6)
74- 76 F3.1 arcmin offset Offset of detection position from best-fit
HI position.
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Note (1): 50%- and 20%-of-peak widths measured as fraction of peak at each edge
of profile in two-horn profiles.
Note (2): Single-horn profiles are Gaussian or triangular in shape and are
usually associated with face-on galaxies or dwarfs. A two-horned
profile is the signature of a rotating disk system: because the disks
have a nearly constant rotation speed and are usually seen at a nearly
fixed inclination, the gas clumps kinematically at two extremes. These
profiles normally have steep edges and weaker emission in the center.
We list Nh=3 for profiles that show an extra central peak or that have
the relatively square shape of a double-horned profile, but in which
the central part of the profile is higher than the horns. These
"triple-horned" profiles indicate the presence of a large amount of
gas moving at lower speeds along the line of sight than the gas
forming the rotation horns. This may be caused by warped disks, tidal
interactions, or confusion with companions.
Note (3): Integrated flux under HI profile for single-beam centered on best-fit
position
Note (4): Integrated over seven-beam hexagonal map area
Note (5): In original search spectrum.
Note (6): 20% width as determined in original search-spectrum detection.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- [SS98c] Arecibo Slice number (1)
3 A1 --- f_[SS98c] [*] Indicates a non-HI-selected source
5- 6 I2 h RAh ? Hour of right ascension (B1950)
8- 9 I2 min RAm ? Minute of right ascension (B1950)
11- 14 F4.1 s RAs ? Second of right ascension (B1950)
16 A1 --- DE- Sign of the declination (B1950)
17- 18 I2 deg DEd ? Degree of declination (B1950)
20- 21 I2 arcmin DEm ? Arcminute of declination (B1950)
23- 24 I2 arcsec DEs ? Arcsecond of declination (B1950)
26 A1 --- u_offset [~] Uncertainty flag on offset
27- 29 F3.1 arcmin offset ? Offset of optical position from best-fit
Arecibo HI position
31- 45 A15 --- OName1 Magnitude-limited cross-identification (2)
47- 59 A13 --- OName2 Diameter-limited cross-identification (3)
61- 75 A15 --- OName3 Cross-identification from UV-excess and
emission-line surveys (4)
77- 81 F5.3 Jy S60um ? IRAS FIR flux at 60µ, if detected (5)
82 A1 --- --- [/]
83 A1 --- l_S100um Limit flag on S100um
84- 89 F6.3 Jy S100um ? IRAS FIR flux at 100µ, if detected (5)
91-105 A15 --- Morph Morphological classification given in NED
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Note (1): [SS98c] 75 has no optical counterpart.
Note (2): Cross-identifications with the three major magnitude-limited galaxy
catalogs covering the region:
NGC/IC: Dreyer 1888MmRAS..49....1D 1888MmRAS..49....1D, 1895MmRAS..51..185D 1895MmRAS..51..185D, 1908MmRAS..59..105D 1908MmRAS..59..105D;
CGCG : Zwicky et al. 1961-1968, Cat. VII/190;
MCG : Vorontsov-Velyaminov et al. 1962-1968, Cat. VII/62.
Note (3): Sources in diameter-limited catalogs.
UGC (Nilson 1973, Cat. VII/26): diameter-limited to an angular
size 1' at the effective surface brightness limit of the POSS;
FGC (Karachentsev et al. 1993, Cat. VII/162): a 40" diameter-
limited search for edge-on, "flat" galaxies;
LSBC (Schombert et al. 1992AJ....103.1107S 1992AJ....103.1107S);
ESDO (Eder et al., 1989ApJ...340...29E 1989ApJ...340...29E).
Note (4): Cross-identifications from UV-excess and emission-line surveys.
For sources identified in numbered lists, we give the source number:
Mrk: Markaryan 1989, Cat. VII/172;
Ark: Arakelian 1975SoByu..47....3A 1975SoByu..47....3A;
Kaz: 1979, Astrofizica, 15, 193.
In catalogs that list sources by their truncated coordinates, we note
only the catalog name:
UCM: Universidad Complutense de Madrid survey of emission-line
galaxies (Zamorano et al. 1994, Cat. J/ApJS/95/387);
KUG: Kiso Ultraviolet Galaxy survey (Takase & Miyauchi-Isobe 1993,
Cat. VII/179);
HS: Hamburg QSO Survey (Popescu et al. 1996, Cat. J/A+AS/116/43).
Note (5): IRAS 60µm and 100µm fluxes (Moshir et al. 1990, Cat. II/156;
Zamorano et al. 1994, Cat. J/ApJS/95/387) for detected sources.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- [SS98c] Arecibo Slice number
3 A1 --- f_[SS98c] [*] Indicates a non-HI-selected source
5- 9 F5.2 mag Bmag ? B-band magnitude measured within the
25mag/arcsec2 elliptical isophote (1)
11- 14 F4.2 mag AB Galactic extinction, as determined using
the COBE-based maps of Schlegel,
Finkbeiner, & Davis (1998).
16- 20 F5.2 mag Bmagc ? Corrected B magnitude B250
22- 26 F5.2 mag Bmagt ? Total extrapolated magnitude BT0 (2)
28- 31 F4.2 arcmin a25 ? Major axis diameter of the elliptical
fit at the corrected 25mag/arcsec2
isophote
33- 36 F4.2 arcmin aH ? Holmberg diameter
38- 41 F4.2 arcmin a(1/2) ? Effective or half-light diameter
43- 46 F4.2 --- b/a ? Axis ratio at the 25mag/arcsec2
isophote
48- 51 F4.2 --- (b/a)H ? Axis ratio at the Holmberg isophote
53- 55 I3 deg PA ? Position angle at 25mag/arcsec2 (3)
57 A1 --- f_B-R [~] Uncertainty flag on B-R
58- 61 F4.2 mag B-R ? (B-R) color index within the B250
63 A1 --- f_B-I [~] Uncertainty flag on B-I
64- 67 F4.2 mag B-I ? (B-I) color index within the B250
69- 72 F4.2 mag (B-R)0 ? Central (B-R)0 color index, determined
at the brightest pixel near the center of
the galaxy and extinction corrected
74- 78 F5.2 mag/arcsec2 mu0 ? Central surface brightness as measured
in the central brightest pixel of the B-b
and image, corrected for extinction
80- 83 F4.2 --- fB ? Fraction of the total light from bulge
component (fB)
84 A1 --- f_fB Flag on fB (4)
86- 90 F5.2 mag/arcsec2 mud ? Projected central surface brightness of
the disk component in blue
92- 95 F4.1 arcsec rd ? Scale length of the disk component
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Note (1): Uncorrected for Galactic extinction AB
Note (2): Total magnitude based on extrapolated model components.
Note (3): Position angle in degrees east from north.
Note (4): Flag on fB, defined as follows:
q = "quarter-law" (r1/4) fit
e = exponential fit
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History:
From electronic version of the journal
(End) Marianne Brouty [CDS] 31-Oct-2005