Arne Henden

BVRI Photometry of the CX Cephei System (WR 151) (2009)

Hutton, Kate, Henden, Arne, Terrell, Dirk

We have obtained 699 new BVRI observations of the O5 + WN5 eclipsing binary system CX Cephei (WR 151), plus 126 more observations in V only. Our light curves are consistent with previous studies,...

Survey of Period Variations of Superhumps in SU UMa-Type Dwarf Novae (2009)

Kato, Taichi, Imada, Akira, Uemura, Makoto, Nogami, Daisaku, Maehara, Hiroyuki, Ishioka, Ryoko, ...

We systematically surveyed period variations of superhumps in SU UMa-type dwarf novae based on newly obtained data and past publications. In many systems, the evolution of superhump period are found...

The 2008 outburst of the cataclysmic variable V358 Lyrae (2009)

Shears, Jeremy, Boyd, David, Campbell, Tut, Dvorak, Shawn, Koff, Robert, Krajci, Tom, ...

We report photometry of V358 Lyr during its 2008 November outburst, the first confirmed outburst since 1965. At its brightest the star was V=15.9 and the outburst amplitude was at least 7.3...

Photometric Calibrations for 21st Century Science (2009)

Kent, Stephen, Kaiser, Mary Elizabeth, Deustua, Susana E., Smith, J. Allyn, Adelman, Saul, Allam, Sahar, ...

The answers to fundamental science questions in astrophysics, ranging from the history of the expansion of the universe to the sizes of nearby stars, hinge on our ability to make precise measurements...

XMM-Newton and Optical Observations of Cataclysmic Variables from SDSS (2009)

Hilton, Eric J., Szkody, Paula, Mukadam, Anjum, Henden, Arne, Dillon, William, Schmidt, Gary D.

We report on XMM-Newton and optical results for 6 cataclysmic variables that were selected from Sloan Digital Sky Survey spectra because they showed strong HeII emission lines, indicative of being...

Characterizing Three Candidate Magnetic Cataclysmic Variables From SDSS: XMM-Newton and Optical Follow-Up Observations (2007)

Homer, Lee, Szkody, Paula, Henden, Arne, Chen, Bing, Schmidt, Gary D., Fraser, Oliver J., ...

In the latest in our series of papers on XMM-Newton and ground-based optical follow-up of new candidate magnetic cataclysmic variables (mCVs) found in the Sloan Digital Sky Survey, we report...

HST and Optical Observations of Three Pulsating Accreting White Dwarfs in Cataclysmic Variables (2006)

Szkody, Paula, Mukadam, Anjum, Gaensicke, Boris T., Woudt, Patrick A., Solheim, Jan-Erik, Nitta, Atsuko, ...

Ultraviolet observations using the Solar Blind Channel on the Hubble Space Telescope provide light curves and low resolution spectra of three pulsating white dwarfs in the cataclysmic variables...

Two Additions to the New Class of Low Accretion-Rate Magnetic Binaries (2006)

Schmidt, Gary D., Szkody, Paula, Henden, Arne, Anderson, Scott F., Lamb, Don Q., Margon, Bruce, ...

Two new magnetic white dwarf accretion binaries with extremely low mass-transfer rates have been discovered in the course of the Sloan Digital Sky Survey. Measured magnetic fields are 42 MG and 57...

Characterizing Three Candidate Magnetic CVs from SDSS: XMM-Newton and Optical Follow-up Observations (2006)

Homer, Lee, Szkody, Paula, Henden, Arne, Chen, Bing, Schmidt, Gary D., Fraser, Oliver J., ...

In the latest in our series of papers on XMM-Newton and ground-based optical follow-up of new candidate magnetic cataclysmic variables (mCVs) found in the Sloan Digital Sky Survey, we report...

Measurement of the orbital and superhump periods of the eclipsing cataclysmic variable SDSS J170213.26+322954.1 (2006)

Boyd, David, Oksanen, Arto, Henden, Arne

The orbital period of the eclipsing cataclysmic variable SDSS J170213.26+322954.1 has been measured as 0.10008215+/-0.00000001d using observations of eclipses during the first recorded superoutburst...

XMM-Newton and optical follow-up observations of SDSS J093249.57+472523.0 and SDSS J102347.67+003841.2 (2005)

Homer, Lee, Szkody, Paula, Chen, Bing, Henden, Arne, Schmidt, Gary, Anderson, Scott F., ...

We report follow-up XMM-Newton and ground-based optical observations of the unusual X-ray binary SDSS J102347.67+003841.2 (=FIRST J102347.6+003841), and a new candidate intermediate polar found in...

Ultracompact AM CVn Binaries from the Sloan Digital Sky Survey: Three Candidates Plus the First Confirmed Eclipsing System (2005)

Anderson, Scott F., Haggard, Daryl, Homer, Lee, Joshi, Nikhil R., Margon, Bruce, Silvestri, Nicole M., ...

AM CVn systems are a rare (about a dozen previously known) class of cataclysmic variables, arguably encompassing the shortest orbital periods (down to about 10 minutes) of any known binaries. Both...

The Dwarf Nova PQ Andromedae (2005)

Patterson, Joseph, Thorstensen, John, Armstrong, Eve, Henden, Arne, Hynes, Robert

We report a photometric study of the WZ Sagittae-type dwarf nova PQ Andromedae. The light curve shows strong (0.05 mag full amplitude) signals with periods of 1263(1) and 634(1) s, and a likely...

Multicolor Observations of ASAS 002511+1217.2 (2005)

Golovin, Alex, Price, Aaron, Templeton, Matthew, Cook, Lewis, Crawford, Timothy, Henden, Arne, ...

We present multicolor CCD photometry of ASAS 002511+1217.2 for first 55 days of 2004 outburst.

SDSS J210014.12+004446.0: A New Dwarf Nova with Quiescent Superhumps? (2005)

Tramposch, Jonica, Homer, Lee, Szkody, Paula, Henden, Arne, Silvestri, Nicole M., Yirak, Kris, ...

We report follow-up observations of the Sloan Digital Sky Survey Cataclysmic Variable SDSS J210014.12+004446.0 (hereafter SDSS J2100). We obtained photometry and spectroscopy in both outburst and...

XMM-Newton and optical follow-up observations of three new polars from the Sloan Digital Sky Survey (2004)

Homer, Lee, Szkody, Paula, Chen, Bing, Henden, Arne, Schmidt, Gary D., Fraser, Oliver J., ...

We report follow-up XMM-Newton and optical observations of three new polars found in the Sloan Digital Sky Survey. Simple modeling of the X-ray spectra, and consideration of the details of the X-ray...

Unravelling the Puzzle of the Eclipsing Polar SDSSJ 015543.40+002807.2 with XMM and Optical Photometry/Spectropolarimetry (2004)

Schmidt, Gary D., Szkody, Paula, Homer, Lee, Smith, Paul S., Chen, Bing, Henden, Arne, ...

The cataclysmic variable SDSSJ 015543.40+002807.2 is confirmed to be a magnetic system of the AM Herculis type. With an orbital period of 87.13 min, it is also the shortest-period eclipsing Polar...

XMM-Newton Observations of the Extremely Low Accretion Rate Polars SDSSJ15531.12+551614.5 and SDSSJ132411.57+032050.5 (2004)

Szkody, Paula, Homer, Lee, Chen, Bing, Henden, Arne, Schmidt, Gary, Anderson, Scott, ...

XMM-Newton observations of the polar SDSSJ155331.12+551614.5 reveal that all the X-ray flux emerges at energies less than 2 keV. The best fit to the spectrum is with a thermal plasma with kT=0.8 keV...

Cataclysmic Variables from SDSS III. The Third Year (2004)

Szkody, Paula, Henden, Arne, Fraser, Oliver, Silvestri, Nicole, Bochanski, John, Wolfe, Michael A., ...

This paper continues the series that identifies new cataclysmic variables found in the Sloan Digital Sky Survey. We present 36 cataclysmic variables and one possible symbiotic star from Sloan spectra...

Xmm observations of polars from the sdss (2004)

Chen , Bing, Henden , Arne, Homer , Lee, Schmidt , Gary, Szkody , Paula

Hemos llevado a cabo observaciones XMM de 5 polares débiles descubiertas por el Sloan Digital Sky Survey. Los ujos de rayos X y los espectros presentan una variedad de regímenes de choque. El...

Cataclysmic Variables from SDSS II. The Second Year (2003)

Szkody, Paula, Fraser, Oliver, Silvestri, Nicole, Henden, Arne, Anderson, Scott F., Frith, James, ...

The first full year of operation following the commissioning year of the Sloan Digital Sky Survey has revealed a wide variety of newly discovered cataclysmic variables. We show the SDSS spectra of...

An energetic stellar outburst accompanied by circumstellar light echoes (2003)

Bond, Howard E., Henden, Arne, Levay, Zoltan G., Panagia, Nino, Sparks, William B., Starrfield, Sumner, ...

Some classes of stars, including supernovae and novae, undergo explosive outbursts that eject stellar material into space. In 2002, the previously unknown variable star V838 Monocerotis brightened...

Crowding in the GAIA spectrograph focal plane (2003)

Zwitter, Tomaz, Henden, Arne

Superpositions of stellar tracings are present in every slitless spectrograph. The probability for such overlaps in the GAIA RVS spectrograph focal plane is estimated using photometric observations...

UBVRI photometric sequences for symbiotic stars (2002)

Munari, Ulisse, Henden, Arne

Deep, wide-range and accurate UBVRI photometric sequences have been established around more than 80 symbiotic stars, to assist current photometry as well as measurement of old photographic plates....

Cataclysmic variables from the Sloan Digital Sky Survey. I. The first results (2002)

Szkody, Paula, Anderson, Scott F., Agüeros, Marcel, Covarrubias, Ricardo, Bentz, Misty, Hawley, Suzanne, ...

The commissioning year of the Sloan Digital Sky Survey (SDSS) has demonstrated that many cataclysmic variables (CVs) have been missed in previous surveys with brighter limits. We report the...

Sloan Digital Sky Survey: Early data release (2002)

Stoughton, Chirs, Lupton, Rpbert H., Bernardi, Mariangela, Blanton, Michael R., Burles, Scott, Castander, Francsico J., ...

The Sloan Digital Sky Survey (SDSS) is an imaging and spectroscopic survey that will eventually cover approximately one-quarter of the celestial sphere and collect spectra of 10 6 galaxies, 100,000...

Sloan Digital Sky Survey Multicolor Observations of GRB010222 (2001)

Lee, Brian C., Tucker, Douglas L., Berk, Daniel E. Vanden, Yanny, Brian, Reichart, Daniel E., Adelman, Jennifer, ...

The discovery of an optical counterpart to GRB010222 (detected by BeppoSAX; Piro 2001) was announced 4.4 hrs after the burst by Henden (2001a). The Sloan Digital Sky Survey's 0.5m photometric...

UBVRI photometric comparison sequences for symbiotic stars. II (2001)

Henden, Arne, Munari, Ulisse

We present accurate and deep UBVRI photometric sequences for an additional 20 symbiotic stars. As for the 20 targets of Paper I, the sequences extend over wide brightness and color ranges, and are...

A 10-micron Search for Inner-Truncated Disks Among Pre-Main-Sequence Stars With Photometric Rotation Periods (2000)

Stassun, Keivan G., Mathieu, Robert D., Vrba, Frederick J., Mazeh, Tsevi, Henden, Arne

We use mid-IR (primarily 10 $\mu$m) photometry as a diagnostic for the presence of disks with inner cavities among 32 pre-main sequence stars in Orion and Taurus-Auriga for which rotation periods are...

A Very Low-Luminosity, Very Cool, DC White Dwarf (1999)

Harris, Hugh, Dahn, Conard, Vrba, Frederick, Henden, Arne, Liebert, James, Schmidt, Gary, ...

The star LHS 3250 is found to be a white dwarf at a distance of 30 pc. Its absolute magnitudes (M_V = 15.72; M_bol = 16.2) put it among the least-luminous white dwarfs known. Its optical spectrum...

Cataclysmic Variables from Sloan Digital Sky Survey. V. The Fifth Year (2004) (1998)

Szkody, Paula, Henden, Arne, Knapp, Gillian R., Schmidt, Gary D., Watson, Todd K., Winget, Don, ...

This paper identifies the cataclysmic variables that appear in spectra obtained in 2004 as part of the Sloan Digital Sky Survey. Spectra of 41 objects, including seven systems that were previously...