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Дата изменения: Sat Nov 25 17:34:13 2000
Дата индексирования: Sat Sep 11 20:32:30 2010
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Поисковые слова: winter solstice

Not-classified objects

Twenty five non emission-line objects are hard to classify at all. Their continua have too low signal-to-noise ratio to detect trustworthy absorption features, or the EWs of the emission lines are too small.

  

Figure: Colour distribution for the random sample of 42 second priority candidates in the strip $\delta$=35-40 (HS 1423+3945 is not included because its APM-colour is not available). The APM classification is shown by circles for stellar and squares for non-stellar images. The filled symbols show the emission-line objects identified by follow-up spectroscopy. BCG/H II-galaxies are marked by an additional cross. 4 of 5 APM stellar-type emission-line objects are either QSOs or distant luminous galaxies. The horizontal line at (B-R) = 10 shows the colour limit for the selection of BCG candidates among the second priority objects classified as non-stellar in the APM.