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J/AJ/109/2376 Case blue/emission-line galaxies (Salzer+ 1995)
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Imaging and spectroscopic observations of the Case Survey
blue/emission-line galaxies.
Salzer J.J., Moody J.W., Rosenberg J.L., Gregory S.A., Newberry M.V.
<Astron. J. 109, 2376 (1995)>
=1995AJ....109.2376S (SIMBAD/NED BibCode)
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ADC_Keywords: Galaxies, photometry ; Photometry, CCD ; Radial velocities
Abstract:
We present CCD imaging and spectroscopic data for 176 blue and/or
emission-line galaxies from Lists I and II of the Case Northern Sky
Survey. Our sample consists of all Case galaxies which lie in the
region which overlaps the original Slice of the Universe survey. We
use the observational data to investigate the physical properties of
the galaxies selected by the surveys to compare with various
parameters published in the survey lists, and to investigate the
selection characteristics and completeness limit of the survey. The
majority of the Case galaxies are energized by regions of active star
formation; only 5% of the sample are Seyfert galaxies. The dual
selection techniques used (both UV-excess and emission lines) allow
the survey to detect star-forming galaxies with a wide range of
properties and evolutionary states. In particular, the Case survey
selects galaxies with lower levels of activity than most previous
surveys. The survey also includes a larger fraction of intermediate
and low-luminosity galaxies than would be present in a purely
magnitude-limited sample. Although galaxies as faint as m_B_=19 are
present in the sample, the completeness limit of the UV-excess
selected portion of the survey is closer to m_B_=16. The luminosity
function of the Case galaxies is derived and compared with that of the
"normal" field galaxies in the same volume of space. The shape of the
Case luminosity function is similar to that for the field sample. A
surprising result is that 31% of the field galaxy population can be
accounted for by galaxies of the type selected in the Case survey.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 81 176 The Case galaxies-sample properties.
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- CG Case Survey number
5- 6 I2 h RAh Right ascension (1950)
8- 9 I2 min RAm Right ascension (1950)
11- 12 I2 s RAs Right ascension (1950)
14 A1 --- DE- Declination sign
15- 16 I2 deg DEd Declination (1950)
18- 19 I2 arcmin DEm Declination (1950)
21- 22 I2 arcsec DEs Declination (1950)
24 A1 --- l_Vmag Limit flag on Vmag
25- 26 I2 mag Vmag Apparent magnitude estimate
28- 34 A7 --- SpCode [bmswyv ?] Spectral code (1)
36- 40 F5.2 mag Bmag B magnitude
41 A1 --- n_Bmag [#] Note on Bmag (2)
43 I1 --- r_Bmag Reference for B magnitude (3)
45- 47 I3 arcsec DiamA ? Angular diameter
50- 54 I5 km/s RV ? Radial velocity corrected to the velocity
centroid of the local group
56- 61 F6.2 mag BMAG ? Absolute B magnitude
64- 67 F4.1 kpc DiamL ? Linear diameter
69- 80 A12 --- Names Other names (4)
81 A1 --- Note [*] Individual note (5)
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Note (1): The first code is an estimate of the color of the continuum.
When the code is absent, there is a blank in column 28
mb: moderate blue
b: (blue), means that the UV continuum is enhanced
y: (yellow), means that the spectrum looks like a more typical
F- or G-type galaxy
The second and first parameters are the strength of the
[OII] and [OIII] lines, respectively. If the [OII] line is
not present, there is a blank after the continuum color:
vs: very strong
s: strong
m: medium strength
w: weak
A ? after the value means that the detection was questionable
Note (2): #: Denotes apparent magnitudes obtained under slightly
non-photometric conditions.
Note (3): 1: MDM CCD photometry
2: CPO CCD photometry
3: CGCG magnitudes modified as specified by
Kron & Shane (1976Ap&SS..39..401K)
4: Case survey list magnitudes modified using the mean offset
between Bmag and mvis (Bmag=mvis+0.25)
Note (4): U = UGC (Nilson 1973, Cat. <VII/26>)
N = NGC (See Cat. <VII/1>)
I = IC (Dreyer 1888, 1895, 1908, Cat. <VII/118>)
Mk = Markarian (1981, Cat. <VII/172>)
Wa = Wasilewski (1983ApJ...272...68W)
Haro = Haro (1956BOTT....2n...8H)
Arp = Arp (1966, Cat. <VII/74>)
Note (5): CG 3 = N2679/80
CG 21 = N2893
CG 33 = N3011
CG 61 = N3265
CG 118 = N3786 = Arp 294
CG 168 = N4253
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History: Prepared via OCR at CDS.
* 30-Sep-1998: 2 OCR errors detected by H. Andernach and corrected
(heinz@astro.ugto.mx)
References:
Pesch & Sanduleak, Case survey. I. 1983ApJS...51..171P
Sanduleak & Pesch, Case survey. II. 1984ApJS...55..517S
Pesch & Sanduleak, Case survey. III. 1986ApJS...60..543P
Sanduleak & Pesch, Case survey. IV. 1987ApJS...63..809S
Pesch & Sanduleak, Case survey. V. 1988ApJS...66..297P
Sanduleak., Case survey. VI. 1988ApJS...66..309S
Sanduleak & Pesch, Case survey. VII. 1988ApJS...66..387S, Cat. <J/ApJS/66/387>
Sanduleak & Pesch, Case survey. VIII. 1989ApJS...70..163P
Sanduleak & Pesch, Case survey. IX. 1989ApJS...70..173S
Pesch & Sanduleak, Case survey. X. 1989ApJS...71..549P, Cat. <J/ApJS/71/549>
Sanduleak & Pesch, Case survey. XI. 1990ApJS...72..291S
Pesch et al., Case survey. XII. 1991ApJS...76.1043P
Stephenson et al., Case survey. XIII. 1992ApJS...82..471S
MacConnell et al., Case survey. XIV. 1993ApJS...86..453M, Cat. <J/ApJS/86/549>
Pesch et al., Case survey. XV. 1995ApJS...98...41P
Augarde et al., Case blue & emm. Gal. 1987A&A...185....4A
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(End) James Marcout, Patricia Bauer [CDS] 26-Sep-1997