Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.sao.ru/precise/Laboratory/Publications/2000/HSSIV/node1.html
Дата изменения: Sat Nov 25 17:34:13 2000
Дата индексирования: Sat Sep 11 20:29:17 2010
Кодировка:
Поисковые слова: южная атлантическая аномалия

Introduction

The main goal of the Hamburg/SAO Survey for Emission-Line Galaxies (HSS) is the search for emission-line galaxies (ELG) in order to create a new deep sample of blue compact/H II galaxies (BCG) in a large area of the sky with a size of the order 1700 square degrees. Another important goal of this work is to search for new extremely low-metallicity galaxies. The search is carried out on the objective prism plates of the Hamburg Quasar Survey (Hagen et al. [1995]). The boundaries of our survey are 7^h 20^m to 17^h 40^m in right ascension and $+35\degr$ to $+50\degr$ in declination, which bridges the gap between the zones of the Second Byurakan Survey (SBS; Markarian et al. [1983], Stepanian [1994]) and the region covered by the Case (Pesch et al. [1995]) survey. The SBS is situated at $\alpha = 7^h 40^m \div 17^h 20^m$, $\delta = +49\degr \div +61\degr$, while the Case zone corresponds to the region with $\alpha = 8^h 00^m \div 16^h 20^m$, $\delta = +29\degr \div +38\degr$. After combination of the four BCG samples coming from the SBS (Izotov et al. [1993a], [1993b], Thuan et al. [1994], Pustilnik et al. [1995]), from the Case survey (Salzer et al. [1995], Ugryumov [1997], Ugryumov et al. [1998]), from the HSS, and from part of the Heidelberg Void survey sample (Popescu et al. [1996]), a large Northern BCG Sample covering about 1 steradian will be available.

In the Papers I and II ((Ugryumov et al. [1999], Pustilnik et al. [1999]) we presented results of our survey in the region between $\delta=$40-50, while in Paper III (Hopp et al. [2000]) and the present paper results from the strip $\delta=$35-40 are given. Forthcoming papers will complete the follow-up spectroscopy in these two regions.

The article is organized as follows. In Section 2 we will review our selection method and present the samples discussed here. In Section 3 we describe the spectroscopic observations and the data reduction. In Section 4 the results of the observations are presented in several tables. In Section 5 we briefly discuss the new data and summarize the current state of the Hamburg/SAO survey. Throughout this paper a Hubble constant H₀ = 75 km$\,$s^-1 Mpc^-1 is used.