J/A+AS/117/261 BR photometry of galaxies in low density regions (Vennik+, 1996)
Surface photometry of galaxies in low density regions.
Vennik J., Hopp U., Kovachev B., Kuhn B., Elsaesser H.
<Astron. Astrophys. Suppl. Ser. 117, 261 (1996)>
=1996A&AS..117..261V 1996A&AS..117..261V (SIMBAD/NED BibCode)
ADC_Keywords: Photometry, surface
Keywords: large scale structure of Universe - galaxies: photometry -
fundamental parameters - structure
Description:
We perform detailed surface photometry, based on B- and/or R-band CCD
images of 92 faint galaxies. They are a subsample of those galaxies
which were studied by Hopp et al. (1994) in the direction of three
nearby voids. We derive integral photometric parameters and radial
surface brightness profiles and compare them to those of several faint
galaxy samples, located in different environments, and of a bright
field galaxy sample. According to the obtained photometric
characteristics, our sample is a mixture of intrinsically bright and
faint galaxies, about 60% of them belonging to the bright subsample
(MB←19.0). These bright ones show mean characteristics of typical
Freeman's disks and are mainly located in the background of the
observed voids. The faint subsample (MB≥-19.0) has parameters
typical for the low-surface-brightness (LSB) galaxies. There are a few
well isolated galaxies both among the bright and faint subsamples.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5 97 82 Observed model-free photometric data in B and
colour characteristics
table6 73 10 Observed model-free photometric data in R
table7 80 82 Reduced photometric data and exponential model
parameters in B
table8 78 10 Reduced photometric data and exponential model
parameters in R
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Byte-by-byte Description of file: table5 table6
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Galaxy designation according to
Hopp et al. (1995) or UGC (Nilson, 1973)
or CGCG (Zwicky et al., 1961-68)
11- 12 I2 h RAh Right ascension (1950) hours
14- 15 I2 min RAm Right ascension (1950) minutes
17- 18 I2 s RAs Right ascension (1950) seconds
20 A1 --- DE- Declination sign
21- 22 I2 deg DEd Declination (1950) degrees
24- 25 I2 arcmin DEm Declination (1950) arcminutes
27- 28 I2 arcsec DEs Declination (1950) arcseconds
30 A1 --- Colour [BR] Colour considered, B or R
31- 35 F5.2 mag MTmag Asymptotic B or R magnitude (1)
38- 42 F5.2 mag M25mag ? Integrated magnitude within
25-th B or R magnitude isophote (1)
44- 47 F4.1 mag rad25 Equivalent radius at the
25-th B or R magnitude isophote
50- 53 F4.2 --- b/a Minor-to-major axis ratio
56- 58 I3 deg PA ? Position angle
59 A1 --- u_PA Uncertainty flag on PA
61- 65 F5.2 mag/arcsec+2 muM,0 Central surface brightness (1)
66 A1 --- u_muM,0 Uncertainty flag on muM,0 (1)
67- 70 F4.1 arcsec radeff Effective (equivalent) radius
72- 75 F4.1 mag (B-R)0 ? Central (B-R) colour index
77- 81 F5.2 mag (B-R)T ? Integral (B-R) colour index
82 A1 --- u_(B-R)T Uncertainty flag on (B-R)T
84- 89 F6.3 mag/arcsec D(B-R)/Dr ? Radial colour gradient
92- 95 F4.3 mag/arcsec e_D(B-R)/Dr ? 1 sigma error of the colour gradient
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Note (1): M stands for B or R, B in table5, R in table6
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Byte-by-byte Description of file: table7 table8
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Galaxy designation according to
Hopp et al.(1995) or UGC (Nilson, 1973)
or CGCG (Zwicky et al., 1961-68)
10- 15 F6.1 Mpc Dist ? Distance
17 A1 --- Colour [BR] Colour considered, B or R
18- 23 F6.2 mag Mag ? Absolute magnitude
26- 29 F4.1 kpc radEff ? Effective (equivalent) radius
30 A1 --- u_radEff Uncertainty flag on radeff
32- 36 F5.2 mag/arcsec+2 muEff ? Effective surface brightness
39- 42 F4.1 arcsec 1/alpha1 ? Exponential scale length
43 A1 --- u_1/alpha1 Uncertainty flag on 1/alpha1
45- 48 F4.1 kpc 1/alpha2 ? Exponential scale length
49 A1 --- u_1/alpha2 Uncertainty flag on 1/alpha2
51- 55 F5.2 mag/arcsec+2 mu0 ? Exponential model central surface
brightness
56 A1 --- u_mu0 Uncertainty flag on mu0
58- 62 F5.2 mag/arcsec+2 mu0,c ? Corrected central surface brightness
63 A1 --- u_mu0,c Uncertainty flag on mu0,c
64- 67 F4.1 --- n Parameter n of the best fitting power law
68 A1 --- u_n Uncertainty flag on n
70- 74 A5 --- Type Profile type
76 I1 --- Class ? Isolation class
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References:
Hopp U., Kuhn B., Thiele U., Birkle K., Elsaesser H., 1995,
A&AS, 109, 537 =1995A&AS..109..537H 1995A&AS..109..537H
Nilson P., 1973, Uppsala General Catalogue of Galaxies, Uppsala
Obs. Ann. 6 =Catalogue VII/26
Zwicky F., Wild P., Herzog E., Karpowicz M., Kowal C., 1961-68, Catalogue
of Galaxies and Clusters of Galaxies 1-6, California Inst. of Techn,
Pasadena =Catalogue VII/49
(End) Patricia Bauer [CDS] 26-Mar-1996