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NB: Those slides dedicated to real observations are just white like this one.

NB: in the presentation, those slides describing virtual observations in the project have a light blue background like this one -. NB: Those slides dedicated to real observations are just white like this one. Project Description :. = astro-ph/0110511

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  1. A T N F @ A S C

  2. NB: in the presentation, those slides describing virtual observations in the project have a light blue background like this one - A T N F @ A S C

  3. NB: Those slides dedicated to real observations are just whitelike this one. A T N F @ A S C

  4. A T N F @ A S C

  5. Project Description : = astro-ph/0110511 In: The Physics of Cataclysmic Variables and Related Objects, ASP Conf. Ser., v. 261, eds. B. Gänsicke et al., p. 301, 2002 and In: New Directions for Close Binary Studies: “The Royal Road to the Stars”, Publ. of Canakkale University Astrophysics Research Center, vol. 3, p. 246, 2003 A T N F @ A S C

  6. A T N F @ A S C

  7. A T N F @ A S C

  8. Project’s flow chart: Stage I – selection of the ROSAT hard spectrum sources [VO]. Stage II – tentative radio IDs [VO].Stage III –high resolution radio observations.Stage IV – optical IDs [VO]; . galaxies to be discarded.Stage V – optical spectroscopy. A T N F @ A S C

  9. Stage I – selection in X-ray from theBright ROSAT Sources Catalogue (1RXS) [W. Voges et al., A&A 349, 389, 1999] The main selection criterium = = Motch’s Strip : 0.90 ≤ HR1 ≤ 1.00 0.25 ≤ HR2 ≤ 1.00 [ C. Motch et al., A&A 132, 341, 1998 ] AND Sources in the Galactic Plane: |b| < 200 A T N F @ A S C

  10. Stage II – tentative identifications in Radio Surveys: • NVSS (VLA, D-configuration) 1.4 GHz • 87GB/GB6/PMN (single dish) 4.8 GHz -----&---- radio variability checking [GB6] = { [1987GB]2 + [1989GB]2} -2 (J. J. Condon, Private comm.) A T N F @ A S C

  11. Stage II: The X-ray-Radio cross-identifications have been made usingCATS: a major collection of databases gathered and maintained by S. Trushkin et al. of the Special Astrophysical Observatory http://cats.sao.ru A T N F @ A S C

  12. SIMBAD :- no GB6 - no NVSS - no 2MASS A T N F @ A S C

  13. N E D : no multi-source query on the web;no 2MASS (only 2MASX) A T N F @ A S C

  14. C A T S :► A complete collection of radio catalogs (191).► Multi-source query.► 2MASS & USNO Catalogs (not Charts/Images).► VOTable format – to be implemented soon.http://cats.sao.ru A T N F @ A S C

  15. C A T S :SUMSS is already there(with a multiple position query,of course).http://cats.sao.ru A T N F @ A S C

  16. Stage III:Targeted radio observations(with a sub-arcsec coordinate precision): • VLA A-configuration, 1.4 & 4.8 GHz • ATCA 6-km configuration, 4.8 & 8.6 GHz A T N F @ A S C

  17. Stage IV:Radio-Optical Identifications by the Digital Sky Surveys (DSS)[obvious galaxies were discarded] A T N F @ A S C

  18. The best DSS access among many others is … A T N F @ A S C

  19. A Virtual Observatoryof theUS Naval Observatory,Flagstaff Station, Arizona:USNO PMMhttp://www.nofs.navy.mil/projects/pmm/Observables: coordinates; charts; images;B, R, I magnitudes at two epochs, (hence variability); image analysis (star/galaxy); proper motions (!)of ~1,000,000,000objects,release B1.0, 2003.

  20. USNO PMM:►flexible multiparameter interface;► multidata output.The best, but not perfect: no multisource query. A T N F @ A S C

  21. Stage V:A moderate resolutionoptical spectroscopy of 60 candidatesbyAAT (4 m)AustraliaBTA (6 m) RussiaVLT (8 m) Chile A T N F @ A S C

  22. Have been observed: • ААТ: spectroscopy of12objects • BТА: spectroscopy of34 • VLT : spectroscopy of 6 ======================================================== Total: 52 + 8 objects to be observed Preliminary results: =============================================================== Stars 12 Featureless spectra 28 Sy1/Sy2/AGN 9 QSO 3 =============================================================== . A T N F @ A S C

  23. . ======================================================== Preliminary results: =============================================================== Stars 12 Active stars=New Featureless spectra 28 if BL Lacs =New Sy1/Sy2/AGN 9 =New QSO 3 =New =============================================================== . A T N F @ A S C

  24. ======================================================== Preliminary results: =============================================================== Stars 12 Featureless spectra 28BL Lacs ? Sy1/Sy2/AGN 9 QSO 3 =============================================================== . A T N F @ A S C

  25. ‘Featureless’ objects28?They all arestar-like (i.e., not extended in optics),bright & hard X-ray emittersandradio sources [due to selection criteria]. A T N F @ A S C

  26. ‘Featureless’ objects28↓Galactic ?Extragalactic ? A T N F @ A S C

  27. ‘Featureless’ objects28↓If extragalactic – BL Lacs behind the GP. A T N F @ A S C

  28. ‘Featureless’ objects28If Galactic ––they could beaNEWtype of objects. A T N F @ A S C

  29. ‘Featureless’ objects28↓EGRETsourcesin the Galactic plane? A T N F @ A S C

  30. No A T N F @ A S C

  31. ‘Featureless’ objects27↓PROPER MOTION? A T N F @ A S C

  32. Yes ! A T N F @ A S C

  33. From USNO-PMM, six of 28 ‘featureless’ objects have p.m.≥ 3-σ, e.g. : A T N F @ A S C

  34. PROPER MOTION:↓MCQC J1910+28μRA =–0.016 ± 0.002 arcsec/y μDEC = – 0.010 ± 0.000 arcsec/y A T N F @ A S C

  35. But we have to get a close look now  A T N F @ A S C

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