Visual search for galaxies near the northern crossing of the Supergalactic Plane by the Milky Way

Abstract

We have visually examined twelve Palomar red Plates for galaxies at low Galactic latitude b, where the Supergalactic Plane (SGP) is crossed by the Galactic Plane (GP), at Galactic longitude l 135 . The catalogue consists of 2575 galaxy candidates, of which 462 have major axis diameters d 0:8 0 (uncorrected for extinction). Galaxy candidates can be identi ed down to jbj 0 . One of our galaxy candidates (J24 = Dwingeloo 1) has recently been discovered independently in 21cm by as a nearby galaxy. Comparisons with the structures seen in the IRAS and UGC catalogues are made. We compare the success rate of identifying galaxies using the IRAS Point Source Catalogue under di erent colour selection criteria. The criteria that require both the 60 m and 100 m uxes to be of high quality, have the highest probability of selecting a galaxy (with d 0:6 0 ), but at the expense of selecting a smaller number of galaxies in total.

The 105-Month Swift-BAT All-sky Hard X-Ray Survey

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