Table 2: Observation summary of 20 $\delta $ Scuti type variable stars and 1 RRa in ROTSE-I field. Last two columns represent the identifications of ROTSE-I group and ours.
\noalign{\smallskip } \hline...
...7167 & 2451280.348 & DS & Non-variable\\
a: DY Her was classified as RR Lyr type stars (GCVS). But It was identified as a HADS (Hoffmeister et al. 1985).
b: It is a well-known $\delta $ Scuti star, YZ Boo.
c: It was also observed by Wils et al. (2002).
d: It is a well-known cataclysmic variable star, AM Her.

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