Observations of suspected symbiotic stars

We present optical and near infrared spectroscopy of the stars V417 Cen, V704 Cen, RT Cru, H1-25, NSV 10435 and NSV 11776. All of these objects show a late-type continuum with bright HI, HeI and [OIII] emission lines. The stars H1-25 and NSV 11776 present emission lines of HeII λ4686, [FeVII] λ6086 and the 6830 A band, while RT Cru and NSV 10435 show only the HeII line. Photoelectric UBVRI and short CCD time series photometry were also obtained for most of these objects. RT Cru presented brightness variations with time scales of 10-30 minutes and amplitude ~0.03-0.05mag in the V band and up to 0.09 mag in the B band; the other stars have not shown short time variations. RT Cru, H1-25, NSV 10435 and NSV 11776 are classified among the symbiotic stars.