5 Conclusions

We conducted follow-up spectroscopy for the second part of candidates from the Hamburg/SAO Survey for ELGs. Summarizing the results presented, the analysis of the content of various types of objects, and the discussion above, we draw the following conclusions:

• The intended methods to detect ELG candidates on the plates of the Hamburg Quasar Survey give a reasonably high detection rate of emission-line objects ($\sim$ 64%) (134 objects of 209 observed in this second part). Additional selection criteria applied in comparison to the first, pilot part increased the efficiency of follow-up spectroscopy by a factor of about two.
• Besides of ELGs we found also 6 new quasars, all with Ly$\alpha$ in the wavelength region 5000-5300 Å (i.e. with 2.9 < z < 3.35) near the red boundary of the IIIa-J photoplates.
• The high fraction of BCG/HII galaxies among all newly discovered ELGs (about 84%) is in line with our main goal -- to pick up a deep BCG sample in the sky region under analysis.

Acknowledgements

This work was supported by the grant of the Deutsche Forschungsgemeinschaft No. 436 RUS 17/77/94. U.A.V is very grateful to the staff of the Hamburg Observatory for their hospitality and kind assistance. SAO authors appreciate the partial financial support from the Russian Foundation for Basic Research grant No. 96-02-16398 and from the Russian Center of Cosmoparticle Physics "Cosmion''. Partial support by the INTAS grant No. 96-0500 is acknowledged. We acknowledge also partial support by the Russian Ministry of Science and Technology for the 6m telescope of SAO RAS (BTA, Reg. number 01-43). The authors thank the referee G.Comte for useful suggestions helping to improve the text. SAO authors are pleased to thank A. Burenkov for the help in observations with the 6m telescope long-slit prime focus spectrograph. The authors acknowledge the use of the NASA/IPAC Extragalactic Database (NED).