1. Cataclysmic Variables: A Perfect Testbed for Variability Brokering Paula Szkody University of Washington Santa Barbara May 13, 2015

2. Disk System Polar Intermediate Polar LARP CV Types Steve Howell

3. Summary of Variability and timescales for Interacting Binaries

4. Dwarf nova outbursts Novalikes - high-low states 1 week to 30 years

6. K2-0

7. K2-1 TW Vir

8.  parabola-like decay of outburst  linear and slow transit between outburst and quiescence.  quiescence covering at least 28 days shows typical flickering behavior. ~ 1 mag ~ 4.5 days 28 days USNO Dwarf nova K2-0

9. July 23 Short Porb, Low M outburst ~ 1/20 yrs.

10. V1159 Ori ER UMA Type Supercycles Szkody et al. 1999, ApJ, 521, 362

11. Z Cam system standstills quiescence outburst Szkody et al. 2013 PASP 125, 1421

12. Tramposch et al. 2005, PASP 117, 262 Positive SH Negative SH SDSSJ2100+00 P=2.099 hr P=1.96 hr

13. Novalike systems (VY Scl, SW Sex types) Honeycutt & Kafka, 2004, AJ, 128, 1279 Low states

14. Honeycutt, Turner & Adams 2003 Roboscope 10 yr erratic variability

15. Orbital variability - hrs

16. P=3.96hr Eclipsing systems- WD goes behind M star P=2.4hr Hot spot Szkody et al. 2003,2004, AJ

17. Phot P: 42.5 min Spect P: 85 min Long P: hrs Szkody et al. 2006, AJ 131, 973

18. Eclipsing AM CVn P=28 min, eclipse=1 min

19. CRTS data on SDSS0926+36

20. 3.9 hr Orbital: 7.8 hr  VSNET reported in 2012 that its periodicity may not be stable. But, the two significant peaks shown in our periodogram confirm the previously derived period and its harmonic. SDSS J0632+25 from K2-0

21. Eclipse of accretion column by M star Polar Schmidt, et al. 2005 ApJ, 620, 422

22. SDSS1344+20 KPNO 2.1m 2011 Day-week variability of a Polar Szkody et al. 2014, AJ 148, 63

23. PTF candidate magnetics (Margon, Levitan,Prince, Hallinan 2013 ASPCS)

24. Examples from CSS

25. White dwarf spin, pulsations - minutes

26. FO Aqr Patterson et al. 1998 PASP P spin = 21 min Spin from Intermediate Polar

27. Light curves & DFTs of accreting pulsator SDSS0745+45 SDSS found 9/17 accreting pulsators Mukadam et al. 2007 ApJ,667

28. SH pulse Mukadam et al. 2013, AJ, 146, 54

29. Flickering – sec to min

30. Novalike LS Peg Recurrent nova (Dobratka et al. 2010) Flickering Examples

31. Effects of Color

32. Cyclotron harmonics result in strange colors

33. Low Accretion Rate Polars as a function of magnetic field Schmidt et al. 2005, ApJ, 630, 1037

34. P=4.4 hrs Cyclotron harmonics depend on filter and orbital phase Szkody et al. 2008, ApJ 683, 967

35. CVs in SDSS 2000-2008 Szkody et al. AJ 2002-2011 Papers I-VIII Need lots of follow-up spectra for ID and properties! What we learned from SDSS: Cyclotron humps Pulsating WD

36. Howell, Nelson, Rappaport 2001, ApJ, 550 Log number of CVs Population models PG, Hamburg SDSS. ID+period constrains evolution LSST

37. Survey Results depend on: Limiting magnitude Filter(s) or spectra Cadence Timespan covered

38. What future surveys need to enable good science for CVs and other variables: a cadence that produces a recognizable light curve sufficient colors to aid in classification rapid/smart classification to ensure followup as needed spectral followup to confirm classification and provide basic parameters