The IPHAS-POSS-I proper motion survey of the Galactic plane

Abstract

???The definitive version is available at www3.interscience.wiley.com '. Copyright Royal Astronomical Society. DOI: 10.1111/j.1365-2966.2009.15077.xWe present a proper motion survey of the Galactic plane, using Isaac Newton Telescope (INT) Photometric H?? Survey (IPHAS) data and Palomar Sky Survey (POSS)-I Schmidt plate data as a first epoch, that probes down to proper motions below 50 mas yr???1. The IPHAS survey covers the northern plane (|b| < 5??) with CCD photometry in the r, i and H?? passbands. We examine roughly 1400 deg2 of the IPHAS survey area and draw up a catalogue containing 103 058 objects with significant proper motions below 150 mas yr???1 in the magnitude range 13.5 < r' < 19 . Our survey sample contains large samples of white dwarfs and subdwarfs which can be identified using a reduced proper motion diagram. We also found several objects with IPHAS colours suggesting H?? emission and significant proper motions. One is the known cataclysmic variable GD552; two are known DB white dwarfs and five others are found to be non-DA (DB and DC) white dwarfs, which were included in the H?? emission line catalogue due to their lack of absorption in the H?? narrow band

The UV-excess Survey of the Northern Galactic Plane

“…When completed EGAPS will provide positions, colours for close to one billion stars in our Galaxy. From the first study on proper motions from EGAPS Deacon et al (2009) showed that we can expect ∼140 objects per square degree with a proper motion µ 20 mas yr −1 .…”

“…The overlap in r band observations between UVEX and IPHAS has a minimum of three years baseline distance, and otherwise identical set-up allows for proper motion determinations down to µ 100 mas yr −1 for the IPHAS -UVEX comparison and down to µ 20 mas yr −1 for an IPHAS -POSS-I comparison; Deacon et al (2009). These should be compared to the recent surveys by Lépine et al (see Lépine 2008 andLépine &Shara, 2005).…”

A first catalogue of automatically selected ultraviolet-excess sources from the UVEX survey

“…The IPHAS‐POSS1 Proper Motion catalogue (Deacon et al 2009) is constructed from POSS‐I Schmidt plate data taken in the 1950s and 1400 square degrees of IPHAS Galactic Plane Survey data as a second epoch. This proper motion catalogue has roughly a fifty years baseline and contains populations such as main‐sequence stars, white dwarfs, subdwarfs and cataclysmic variables.…”

“…11 together with all the objects in the Deacon IPHAS‐POSS1 catalogue. Here reduced proper motion is defined as H r = r + 5log (μ) + 5, where r is the r ‐band magnitude and μ is the proper motion in arcseconds per year (see Deacon et al 2009). The majority of the proper motion UV‐excess sources overlaps the white dwarf population around ( r − i ) ∼ 0.…”

UCAC3 PROPER MOTION SURVEY. I. DISCOVERY OF NEW PROPER MOTION STARS IN UCAC3 WITH 0.″40 yr–1> μ ⩾ 0.″18 yr–1BETWEEN DECLINATIONS –90° AND –47°

“…Utilizing various techniques and plate sets, these new computerized searches have revealed many new proper motion systems. Recent surveys of the southern sky-the region targeted by the present effort-include Wroblewski & Costa (1999), Scholz et al (2000Scholz et al ( , 2002, Oppenheimer et al (2001), the Southern Infrared Proper Motion Survey (SIPS; Deacon et al 2005;Deacon & Hambly 2007), the IPHAS-POSS-I proper motion survey of the Galactic plane (Deacon et al 2009), and Lepine's SUPERBLINK survey (Lépine 2005(Lépine , 2008.…”