Richard M. Plotkin

Optically Selected BL Lacertae Candidates from the Sloan Digital Sky Survey Data Release Seven (2009)

Plotkin, Richard M., Anderson, S. F., Brandt, W. N., Diamond-Stanic, A. M., Fan, X., Hall, P. B., ...

We present a sample of 723 optically selected BL Lac candidates from the SDSS DR7 spectroscopic database encompassing 8250 deg^2 of sky; our sample constitutes one of the largest uniform BL Lac...

A Sample of Candidate Radio Stars in FIRST and SDSS (2009)

Kimball, Amy E., Knapp, Gillian R., Ivezic, Zeljko, West, Andrew A., Bochanski, John J., Plotkin, Richard M., ...

We conduct a search for radio stars by combining radio and optical data from the Faint Images of the Radio Sky at Twenty cm survey (FIRST) and the Sloan Digital Sky Survey (SDSS). The faint limit of...

GALEX, Optical and IR Light Curves of MQ Dra: UV Excesses at Low Accretion Rates (2008)

Szkody, Paula, Linnell, Albert P., Campbell, Ryan K., Plotkin, Richard M., Harrison, Thomas E., Holtzman, Jon, ...

Ultraviolet light curves constructed from NUV and FUV detectors on GALEX reveal large amplitude variations during the orbital period of the Low Accretion Rate Polar MQ Dra (SDSSJ1553+55). This...

A Large Sample of BL Lacs from SDSS and FIRST (2008)

Plotkin, Richard M., Anderson, Scott F., Hall, Patrick B., Margon, Bruce, Voges, Wolfgang, Schneider, Donald P., ...

We present a large sample of 501 radio-selected BL Lac candidates from the combination of the Sloan Digital Sky Survey (SDSS) Data Release 5 optical spectroscopy and from the Faint Images of the...

A large sample of BL Lac objects from the SDSS and FIRST (2008)

Plotkin, Richard M., Anderson, Scott F., Hall, Patrick B., Margon, Bruce, Voges, Wolfgang, Schneider, Donald P., ...

A large, uniform sample of X-ray-emitting active galactic nuclei from the ROSAT all sky and sloan digital sky surveys: the data release 5 sample (2007)

Anderson, Scott F., Margon, Bruce, Voges, Wolfgang, Plotkin, Richard M., Syphers, David, Haggard, Daryl, ...

A Large, Uniform Sample of X-ray Emitting AGN from the ROSAT All-Sky and Sloan Digital Sky Surveys: the Data Release 5 Sample (2006)

Anderson, Scott F., Margon, Bruce, Voges, Wolfgang, Plotkin, Richard M., Syphers, David, Haggard, Daryl, ...

We describe further results of a program aimed to yield ~10^4 fully characterized optical identifications of ROSAT X-ray sources. Our program employs X-ray data from the ROSAT All-Sky Survey (RASS),...

Galex and optical light curves of EF Eridanus during a low state: The puzzling source of ultraviolet light (2006)

Szkody, Paula, Harrison, Thomas E., Plotkin, Richard M., Howell, Steve B., Seibert, Mark, Bianchi, Luciana

Low-state optical photometry of EF Eri during an extended low accretion state combined with GALEX near- and far-UV time-resolved photometry reveals a source of UV flux that is much larger than the...

GALEX and Optical Light Curves of EF Eridanus During a Low State: the Puzzling Source of UV Light (2006)

Szkody, Paula, Harrison, Thomas E., Plotkin, Richard M., Howell, Steve B., Seibert, Mark, Bianchi, Luciana

Low state optical photometry of EF Eri during an extended low accretion state combined with GALEX near and far UV time-resolved photometry reveals a source of UV flux that is much larger than the...

Hubble Imaging Excludes Cosmic String Lens (2006)

Agol, Eric, Hogan, Craig J., Plotkin, Richard M.

The galaxy image pair CSL-1 has been a leading candidate for a cosmic string lens. High quality imaging data from the Hubble Space Telescope presented here show that it is not a lens but a pair of...

Circular Polarization Variability in Extragalactic Sources on Time Scales of Months to Decades (2003)

Aller, Hugh D., Aller, Margo F., Plotkin, Richard M.

We present previously unpublished circular polarization (cp) measurementsat 4.8 and 8.0 GHz made with the University of Michigan 26-meter primefocus telescope during 1978–1984 and results of a...