Table 1: Properties of the five new dwarf novae.
  HS 0417+7445 HS 1016+3412 HS 1340+1524 HS 1857+7127 HS 2214+2845

Right ascension (J2000)		 $04^{\rm h}23^{\rm m}32.8^{\rm s}$ $10^{\rm h}19^{\rm m}47.3^{\rm s}$ $13^{\rm h}43^{\rm m}23.2^{\rm s}$ $18^{\rm h}57^{\rm m}20.4^{\rm s}$ $22^{\rm h}16^{\rm m}31.2^{\rm s}$
Declination (J2000) $+74\hbox{$^\circ$ }52\hbox{$^\prime$ }50.30\hbox{$^{\prime\prime}$ }$ $+33\hbox{$^\circ$ }57\hbox{$^\prime$ }53.9\hbox{$^{\prime\prime}$ }$ $+15\hbox{$^\circ$ }09\hbox{$^\prime$ }16.9\hbox{$^{\prime\prime}$ }$ $+71\hbox{$^\circ$ }31\hbox{$^\prime$ }19.2\hbox{$^{\prime\prime}$ }$ $+29\hbox{$^\circ$ }00\hbox{$^\prime$ }20.6\hbox{$^{\prime\prime}$ }$
Period (min) $\simeq$105.1/$\simeq$109.9 $114.3\pm2.7$ $92.66\pm0.17$ $272.317\pm0.001$ $258.02\pm0.56$
Magnitude range 18.0-13.5 18.6-15.4: 18.5-14.2 17.2-13.9 16.5-12.3
${\rm H\alpha }$ EW [Å]/ FHWM [Å] 172/43 184/27 121/28 39/32 53/33
${\rm H\beta }$ EW [Å]/ FHWM [Å] 98/43 125/25 88/23 33/32 42/31
${\rm H\gamma}$ EW [Å]/ FHWM [Å] 73/38 85/24 59/22 27/33 30/32
He  I  $\lambda$5876 EW [Å]/ FHWM [Å] 40/43 52/31 36/30 7/34 7/25
He  I  $\lambda$6678 EW [Å]/ FHWM [Å] 7/30 26/35 18/32 3/46 5/39
RASS source (1RXS J) 042332.8+745300 101946.7+335811 134323.1+150916 185722.6+713126 221631.2+290025
RASS count rate ${\rm (0.01~cts~s^{-1})}$ $6.0\pm1.3$ $2.5\pm1.0$ $7.3\pm1.7$ $3.4\pm4.5$ $9.9\pm1.5$
Hardness ratio HR1 $1.00\pm0.09$ $1.00\pm0.91$ $0.18\pm0.23$ $1.00\pm0.04$ $0.92\pm0.06$
Hardness ratio HR2 $0.21\pm0.20$ $-0.32\pm0.38$ $-0.05\pm0.27$ $0.69\pm0.10$ $0.10\pm0.14$
Notes. The coordinates are taken from the USNO-B catalogue (Monet et al. 2003); the ROSAT PSPC count rates and hardness ratios HR1 and HR2 have been obtained from the ROSAT All Sky Survey (RASS) Bright Source Catalogue (Voges et al. 1999) and from the RASS Faint Source Catalogue (Voges et al. 2000); the ${\rm H\alpha }$- ${\rm H\gamma}$ and He  I  $\lambda$5876, 6678 equivalent widths (EW) and full width at half maximum (FWHM) were measured from the Calar Alto average spectra (Fig. 2) using the integrate/line task in MIDAS; the outburst of HS 1016 is uncertain (marked by a colon), as only one outburst was observed.


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