[vsnet-alert 120] the submitted article on AL Com

[Daisaku Nogami <nogami@kusastro.kyoto-u.ac.jp>]

Dear colleagues,

We have submitted the following article to IAUC.

Regards,
Daisaku Nogami and Taichi Kato
------------------------------------------------------------------
>From nogami Tue Apr 18 05:03:55 1995
To: GREEN@CFA.HARVARD.EDU, MARSDEN@CFA.HARVARD.EDU
Cc: nogami, tkato


Central Bureau for Astronomical Telegrams
INTERNATIONAL ASTRONOMICAL UNION

   I would like to submit the following article to IAUC.

Best regards,
Daisaku Nogami and Taichi Kato
Dept. of Astronomy,
Kyoto University

Apr. 17 1995

============
AL COMAE BERENICES

     The V-band CCD photometry obtained by a 0.60-m reflector at Ouda
Station, Kyoto University, indicate that the hump-like feature reported
independently by J. Patterson and J. A. DeYoung (IAUC 6157) showed a
continous decay until Apr. 12.  The data between Apr. 17.440 UT and
17.691 UT clearly demonstrate a periodic modulation with a period of
0.0576 +/- 0.0002 day, and with an amplitude of 0.18 mag.  This period
is slightly longer than those reported earlier and one (0.05666 +/-
0.00002 day) determined by us from Apr. 7 - 12 observations.  This fact
indicates that the new features are genuine superhumps, and earlier
detection may reflect a variation related to the orbital motion of
the underlying binary.  The present observation thus first firmly
identifies the SU UMa-type nature of AL Com.  However, the base-line
is not so long.  The follow-up observations are expected.

VSNET Home Page

Return to Daisaku Nogami

---

vsnet-adm@kusastro.kyoto-u.ac.jp