1. 1 st results from cross-matching with X-ray data George Seabroke

2. Talk Outline Travel money acknowledgement Why X-match RAVE with X-ray data? X-ray-optical X-match literature review Who’s actually X-matching RAVE with X-ray data? X-match Results Conclusions

3. Department of Physics & Astronomy Planetary & Space Sciences Research Institute The Open University Department of Earth & Environmental Sciences

4. Department of Physics & Astronomy Planetary & Space Sciences Research Institute The Open University Department of Earth & Environmental Sciences CEPSAR Interdisciplinary Project (£1000!)

5. Department of Physics & Astronomy Academics: Academics: Ulrich Kolb Ulrich Kolb Andrew Norton Postdoc: Robin Barnard Andrew Norton Postdoc: Robin Barnard Planetary & Space Sciences Research Institute Academics: Andrew Holland Andrew HollandPostdoc: George Seabroke George Seabroke The Open University CEPSAR Interdisciplinary Project (£1000!)

6. Why cross-match RAVE with X-ray data? Physics of stellar X-ray emission not understood but linked to stellar properties Stellar X-ray activity identifies interesting, rare stars – Cataclysmic variables – White dwarfs etc Stellar X-ray activity identifies youngest stars – Currently no RAVE stellar age diagnostic – Probes large-scale distribution of young stars Moving groups Gould disc

7. Guillout et al. (1998)

9. X-ray-optical X-match literature review Guillout et al. (1999) X-matched ROSAT All-Sky Survey (RASS, pre-release: 150,000) with: – Hipparcos (6200 out of 118,200 = 5.25%) – Tycho (13,875 out of 10 6 = 1.39%) Agueros et al. (2009) X-matched RASS (public release: 125,000) with – SDSS DR1 (709 out of 53 million = 0.001%)

10. Who’s actually cross-matching RAVE with X-ray data? Duncan Fyfe (Leicester) Helped write XMM-Newton data reduction pipeline i.e X-ray expert!

11. X-match Results X-ray catalogueReferenceSearch radius (arcsec) No of RAVE stars No of X-ray sources % 2 nd XMM Serendipitous Survey Watson et al. (2009)5269191,8700.14 XMM Slew SurveySaxton et al. (2008)57347101.55 ROSAT Faint Source Catalogue Voges et al. (2000)501215105,9241.15 ROSAT Bright Source Catalogue Voges et al. (1999)5064718,8063.44

14. Conclusions Deadline for next CEPSAR Interdisciplinary Projects (for £1000 again) Wed 17 th June – In addition to asking for travel £ for next RAVE meeting based on continuing OU X-ray collaboration, shall I aslo include investigation of RAVE CCD upgrade to e2v HiRho CCD? XRAVE catalogue plans – X-match RAVE with Chandra serendipitous catalogue as well – Validate X-match quality – Use most accurate distances (Breddels et al. 2009 using stellar models vs Klement et al. 2008 using Tycho-2 B & V?) to calculate X-ray luminosity – Make internal X-match available internally to collaboration? – Make DR3 X-match publically available via VizieR & publicize with paper inc 1 st X-ray RAVE science (TBD: LMC & SMC X-ray sources)?