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Nicholson, M. (2007). Four previously unreported quasars in Leo. PHILICA.COM Article number 80.

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Four previously unreported quasars in Leo

Martin Nicholsonconfirmed user (Independent Researcher)

Published in astro.philica.com

Abstract
The discovery of four previously unreported quasars in the constellation of Leo is described. The spectrum of each quasar is illustrated to confirm the classification.

Article body

Four previously unreported quasars in Leo

Martin Nicholson

Daventry, England

newbinaries@yahoo.co.uk

www.martin-nicholson.info

Abstract

The discovery of four previously unreported quasars in the constellation of Leo is described. The spectrum of each quasar is illustrated to confirm the classification.

Discovery

These four quasars were identified as "candidate quasars" by data mining the publicly available data released by the Sloan Digital Sky Survey (SDSS). The status of each of the objects was confirmed by a visual examination of the published spectra.

Results

Candidate #1

Ra

Dec

u mag

g mag

r mag

i mag

z mag

z

150.01552

31.529373

17.53693

17.55753

17.56539

17.69767

17.14344

0.320507


Figure 1 - Spectrum of candidate quasar #1

 

Candidate #2

Ra

Dec

u mag

g mag

r mag

i mag

z mag

z

150.06615

32.665013

18.70221

18.42499

18.30503

18.49197

18.45461

0.89749


Figure 2 - Spectrum of candidate quasar #2

 

Candidate #3

Ra

Dec

u mag

g mag

r mag

i mag

z mag

z

150.07257

30.890048

20.26299

20.00648

19.69362

19.48595

19.55639

1.59253

Figure 3 - Spectrum of candidate quasar #3 

 

Candidate #4

Ra

Dec

u mag

g mag

r mag

i mag

z mag

z

150.08981

28.996999

19.29475

19.13309

18.98985

19.01178

19.08397

1.35955

Figure 4 - Spectrum of candidate quasar #4 

 

Summary

Quasars numbers 1, 2 and 4 were not previously identified as such in any of the sources consulted. Quasar number 3 had previously been identified as a generic X Ray source.

Acknowledgements

Funding for the SDSS-II has been provided by the Alfred P. Sloan Foundation, the National Science Foundation, the U.S. Department of Energy, the Japanese Monbukagakusho, the Max Planck Society, and the Higher Education Funding Council for England.

The SDSS is managed by the Astrophysical Research Consortium for the Participating Institutions: the American Museum of Natural History, Astrophysical Institute Potsdam, University of Basel, Cambridge University, Case Western Reserve University, University of Chicago, Drexel University, Fermilab, the Institute for Advanced Study, the Japan Participation Group, Johns Hopkins University, the Joint Institute for Nuclear Astrophysics, the Kavli Institute for Particle Astrophysics and Cosmology, the Korean Scientist Group, the Chinese Academy of Sciences (LAMOST), Los Alamos National Laboratory, the Max-Planck-Institute for Astronomy (MPA), the Max-Planck-Institute for Astrophysics (MPIA), New Mexico State University, Ohio State University, University of Pittsburgh, University of Portsmouth, Princeton University, the United States Naval Observatory, and the University of Washington.

References

Each of these quasars was checked against the following on-line resources:-

Quasars and Active Galactic Nuclei (12th Ed.) (Veron+ 2006)

http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=VII/248

SDSS quasar catalog. III. (Schneider+, 2005)

http://vizier.u-strasbg.fr/viz-bin/VizieR?-source=VII/243

Simbad

http://simbad.u-strasbg.fr/simbad/sim-fid

 

Information about this Article
This Article has not yet been peer-reviewed
This Article was published on 6th February, 2007 at 09:13:08 and has been viewed 5658 times.

Creative Commons License
This work is licensed under a Creative Commons Attribution 2.5 License.
The full citation for this Article is:
Nicholson, M. (2007). Four previously unreported quasars in Leo. PHILICA.COM Article number 80.


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