1998 - 2003: PhD program, UCLA Astronomy Dept. (filed on Nov 12th; moving to GSFC soon...)
1996 - 1998: Data Analyst, National Radio Astronomy Observatory, Socorro, NM (see below)
1992 - 1996: A.B. in Astrophysics, Univ. of California, Berkeley
Current Research:
X-ray variability timing and spectral
analysis of Active Galactic Nuclei, using
data from both the Rossi
X-ray Timing Explorer (RXTE) and the X-ray Multi-Mirror Mission
(XMM-Newton); advisor:
Prof. Rick Edelson.
Publications:
An RXTE Survey of Long-Term X-ray Variability in
Seyfert 1 Galaxies, Alex Markowitz & Rick Edelson, 2001, ApJ, 547, 684. Available at
astro-ph/0009422.
X-ray Power Density Spectrum of the Narrow Line Seyfert 1 Galaxy Akn 564, Ken Pounds, Rick Edelson, Alex Markowitz, Simon Vaughan, 2001, ApJ, 550, L15. Available at
astro-ph/0101542.
High Temporal Resolution XMM-Newton Monitoring of PKS 2155-304,
Rick Edelson, Gareth Griffiths, Alex Markowitz, Steve Sembay, Martin Turner, Robert Warwick, 2001, ApJ, 554, 274. Available at
astro-ph/0102458
X-ray Spectral Variability and Rapid Variability of the Soft X-ray Spectrum Seyfert 1 Galaxies Ark 564 and Ton S180,
Rick Edelson, T. Jane Turner, Ken Pounds, Simon Vaughan, Alex Markowitz, Herman Marshall, Paul Dobbie,
Robert Warwick, 2002, ApJ, 568, 610, Available at
astro-ph/0108387.
Complex X-ray Spectral Variability in Mkn 421 observed with XMM-Newton,
Steve Sembay, Rick Edelson, Alex Markowitz, Gareth Griffiths, Martin Turner, 2002, ApJ, 574, 634.
Available at
astro-ph/0204179
X-ray vs. Optical Variations in the Seyfert 1 Nucleus NGC 3516:
A Puzzling Disconnectedness, Dani Maoz, Alex Markowitz, Rick Edelson and
Kirpal Nandra, AJ, 124, 1988. Available at
astro-ph/0207446
X-ray Fluctuation Power Spectral Densities of Seyfert~1 Galaxies,
Alex Markowitz, Rick Edelson, Simon Vaughan, Phil Uttley, Ian George,
Richard Griffiths, Shai Kaspi, Andy Lawrence, Ian McHardy, Kirpal Nandra,
Ken Pounds, James Reeves, Nick Schurch and Robert Warwick, 2003, ApJ, 593, 96. Available at
astro-ph/0303273
Correlated long-term optical and X-ray variations in NGC 5548, Phil Uttley, Rick Edelson, Ian McHardy, Brad Peterson and Alex Markowitz, 2003, ApJ, 584, L53. Available at
astro-ph/0301216
Long-Term X-ray Spectral Variability in Seyfert 1 Galaxies, Alex Markowitz, Rick Edelson & Simon Vaughan, 2003, ApJ, in press. Available at
astro-ph/0308312
Conference Contributions:
An RXTE Survey of Long-Term X-ray Variability in
Active Galaxies (poster presentation), A. Markowitz & R. Edelson, Proceedings of Conference
"Rossi2000: Astrophysics with the Rossi X-ray Timing Explorer," 2000 March 22-24, Greenbelt, MD, p. E38
Ton S180, T. J. Turner et. al., 2000, Probing the Physics of
Active Galactic Nuclei by Multiwavelength Monitoring, ASP
Conference Series, Vol. 224, ed. B.M. Peterson, R. S.
Polidan, & R. W. Pogge, p. 303
High Temporal Resolution XMM-Newton Monitoring of PKS 2155-304,
Rick Edelson, Gareth Griffiths, Steve Sembay, Martin J. L. Turner, Alex Markowitz, Robert Warwick & XMM-Newton EPIC Instrument Team, 2000, BAAS, 197, 125.07
A Comprehensive RXTE Database of AGN Variability (poster presentation), Alex Markowitz, Rick Edelson \& Simon Vaughan, 2001, in ``X-ray Emission from Accretion onto Black Holes,'' Proceedings of a joint workshop held by the Center for Astrophysics (Johns Hopkins University) and the Laboratory for High Energy Astrophysics (NASA/ Goddard Space Flight Center) in Baltimore, MD, June 20-23, 2001, eds.: T. Yaqoob and J. H. Krolik, http://www.pha.jhu.edu/groups/astro/workshop2001/
X-ray Fluctuation Power Spectral Densities of Seyfert~1 Galaxies,
Alex Markowitz et al., 2002, BAAS, 200, 17.03
X-ray Fluctuation Power Spectral Densities of Seyfert~1 Galaxies (poster presentation),
Alex Markowitz et al., 2003, Carnegie Observatories Astrophysics Series, Vol. 1: Coevolution of Black Holes and Galaxies, ed. L. C. Ho (Cambridge: Carnegie Observatories, http://www.ociw.edu/ociw/symposia/series/symposium1/proceedings.html)
Prev. Research/ NRAO section:
I worked as a Data Analyst at the
National Radio Astronomy Observatory in
Socorro, NM, from Jul. '96 to Aug. '98.
Links:
VLA imaging of
galaxy J0700+22,
a diffuse, low-surface brightness radio object
uncovered in the NVSS survey. Observed 22 Dec 1997 (18cm & 6cm)
& 12 Feb 1998 (4cm & 2cm). It has a twisty jet.
VLBA Calibrator/Fringe-Finder Tests:(Last modified 24 July 1998.)
First two epochs observed 24 Nov 1997 & 26 Apr 1998--
UVPLTs & Contour image plots for eight sources (0234+285, 3C84,
0528+134, DA193, 4C39.25, 3C345, 2007+777, & 3C454.3) available
at seven frequencies. Third epoch observed
27 July 1998 (DA406, 3C279, OQ208); stay tuned. Associated VLBA Test Memo
(#60) officially submitted.
