PG1510+234 (NY Ser) -- SU UMa star in the period gap!

(vsnet-alert 397, D. Nogami, 1996 Apr. 23)

Dear Colleagues,

Our observation revealed that the ongoing outburst in PG 1510+234 (=NSV06990 = Ser1 in Downes & Shara(1993)) has been lasting for at least three days and the superhumps with an amplitude of ~0.3 mag clearly exist on April 23. Although the superhump period can not be measured precisely due to shortness of the coverage, it seems to exceed 2 hours. It was proved that PG 1510+234 is an SU UMa-type dwarf nova with a small amplitude of ~3mag.

Best regards,
Daisaku Nogami & Ouda Team

In the period gap!

(vsnet-alert 398)

Dear Colleagues,

We have just reduced the PG1510+234 data obtained in the last night. The superhumps with an amplitude of ~0.3 mag still existed. Surprisingly, our period analysis using the April 23 and 24 results gives the superhump period of 0.1064 (+-0.0003) day (= 153.2 (+-0.4) min)! Is PG 1510+234 located at the midst of the CV period gap?!

Best regards,
Daisaku Nogami & Ouda Team

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