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NGC 5895


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Nearby Optical Galaxies: Selection of the Sample and Identification of Groups
In this paper we describe the Nearby Optical Galaxy (NOG) sample, whichis a complete, distance-limited (cz<=6000 km s-1) andmagnitude-limited (B<=14) sample of ~7000 optical galaxies. Thesample covers 2/3 (8.27 sr) of the sky (|b|>20deg) andappears to have a good completeness in redshift (97%). We select thesample on the basis of homogenized corrected total blue magnitudes inorder to minimize systematic effects in galaxy sampling. We identify thegroups in this sample by means of both the hierarchical and thepercolation ``friends-of-friends'' methods. The resulting catalogs ofloose groups appear to be similar and are among the largest catalogs ofgroups currently available. Most of the NOG galaxies (~60%) are found tobe members of galaxy pairs (~580 pairs for a total of ~15% of objects)or groups with at least three members (~500 groups for a total of ~45%of objects). About 40% of galaxies are left ungrouped (field galaxies).We illustrate the main features of the NOG galaxy distribution. Comparedto previous optical and IRAS galaxy samples, the NOG provides a densersampling of the galaxy distribution in the nearby universe. Given itslarge sky coverage, the identification of groups, and its high-densitysampling, the NOG is suited to the analysis of the galaxy density fieldof the nearby universe, especially on small scales.

HI observations of some galaxies and their faint companions
Twenty-one-cm line observations of single galaxies with multiple faintcompanions have been carried out with the Nancay Decimetric Radiotelescope. Twelve galaxies have been detected, including six companiongalaxies. Three new detections in HI are reported. Flux density upperlimits are given for the undetected galaxies.

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Observation and Astrometry data

Constellation:Bootes
Right ascension:15h13m50.10s
Declination:+42°00'26.0"
Aparent dimensions:0.871′ × 0.234′

Catalogs and designations:
Proper Names   (Edit)
NGC 2000.0NGC 5895
HYPERLEDA-IPGC 54366

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