Access to Astronomical Catalogues

← Click to display the menu
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 (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:
FileName Lrecl Records Explanations
ReadMe 80 . This file table5 97 82 Observed model-free photometric data in B and colour characteristics table6 95 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
Byte-by-byte Description of file: table5 table6
Bytes Format Units Label Explanations
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
Note (1): M stands for B or R, B in table5, R in table6
Byte-by-byte Description of file: table7 table8
Bytes Format Units Label Explanations
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
References: Hopp U., Kuhn B., Thiele U., Birkle K., Elsaesser H., 1995, A&AS, 109, 537 =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
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service