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1. A search for faint blue stars.
ID:
ivo://CDS.VizieR/II/239
Title:
A search for faint blue stars.
Short Name:
II/239
Date:
21 Oct 2021
Publisher:
CDS
Description:
Continuing the survey for faint blue stars at high galactic latitudes of Haro and Luyten (1962, Cat. <III/74>, this search was made, following the Tonantzintla three image method, with the 48" Schmidt telescope of Mt. Palomar. In the first paper, a catalogue of 4431 stars and 84 compact objects found in nine PSS fields scattered around the NGP is presented, with the 1950 positions and the estimated magnitudes and colour classes. The catalogue contains also extensive identifications with previous surveys, including some known QSSs; 16 QSS candidates are proposed; spectra are available for most of the unknown stars brighter than 14mag. In the second paper, a catalogue of 2011 stars and compact objects is presented with the 1950 positions and the estimated magnitude and colour classes. Complementary to the catalogue of Haro and Luyten (1962BITon...3...37H) at declination +6{deg} and 0{deg} it contains also extensive identifications with previous surveys and known QSO's; candidate QSO's are indicated; spectra are available for some new blue stars. The third and last part of the survey of faint blue objects contains a catalogue of 2484 starlike or compact objects is presented with the 1950 positions, estimated magnitudes, color classes and extensive identifications with stars of previous surveys and known QSO's. The three parts were merged into a single file "catalog.dat".
2. Faint Blue Objects at High Galactic Latitude
ID:
ivo://CDS.VizieR/II/115A
Title:
Faint Blue Objects at High Galactic Latitude
Short Name:
II/115A
Date:
21 Oct 2021
Publisher:
CDS
Description:
The data set of Faint Blue Objects at High Galactic Latitude is a catalog of objects selected according to relative ultraviolet excess from ubv three-color 1.2-m Palomar Schmidt plates. Five selected area fields centered on SA28, SA29, SA55, SA57 and SA94 are included. The data consist of color classifications, B magnitudes, 1950 equatorial coordinates and remarks; the current file contains 3678 objects. Three selected area fields were included originally, centered on SA57 (Usher 1981), SA29 (Usher, Mattson and Warnock 1982) and SA28 (Usher and Mitchell 1982). Areas centered on SA55 and SA94 were added in 1984; areas centered on SA71 (Usher et al., Paper V, 1988ApJS...66....1U) and SA82 (Usher & Mitchell, Paper VI, 1990ApJS...74..885U) were added in 2007 by CDS.
3. Faint Blue Stars near the South Galactic Pole
ID:
ivo://CDS.VizieR/III/74
Title:
Faint Blue Stars near the South Galactic Pole
Short Name:
III/74
Date:
21 Oct 2021
Publisher:
CDS
Description:
A search for faint blue stars conducted at the Observatories of Tonantzintla and Minnesota has yielded 8746 objects which are somewhat blue. The data file is organized into three sections with the same column format. The first 1569 records are for stars with U-V of -0.4 or bluer, which are very definitely blue (Table II of the paper). The next 2929 stars are somewhat blue, with U-V values of -0.3 or -0.2 (Table III of the paper). The final 4248 records give data for stars with U-V of -0.1 or 0.0 (Table IV of the paper). Photometric, spectroscopic, and proper-motion data have later been acquired for these objects, which revealed the great variety of the objects in this catalogue: white dwarfs, subdwarfs, QSOs (quasars), compact and active galaxies. Finding charts and details about the nature of these blue objects can be found in the following papers: Haro G., and Chavira E.: 1987RMxAA..15..107H ; Chavira E.: 1988RMxAA..16..123C, Chavira E., 1990RMxAA..20...47C, and 1992RMxAA..24..139C

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