Return to Home Page
(1992 May 6)
subject: PG0943+521 etc.
Sir Dr. Hurst,
PG 0943+521
Thank you for the confirmation. This star is still bright at
about V=13 on TV monitor tonight.
HV Vir
Totally 17 superhump maxima have been obtained from May 1 through
May 5. Linear fit of three sucessive nights give the superhump period
of 0.05826 day, which is the second shortest known (only surpassed by
WZ Sge, and possibly WX Cet).
Whole observation including Dodaira photometry can not be well
respresented by linear equation. The period may be changing but not
yet fully confirmed. The amplitude of superhumps were between 0.1 and
0.2 mag.
Tonight the star is at about V=14.3, still in slow decline.
Differential magnitudes between HV Vir and GSC V=14.4 mag star:
UT V-C band
May 5.442 +0.43 I
5.444 -0.74 B
5.448 -0.20 V
Nova Cyg 1992
mid UT v-c1 v-c2 band
3.766 -0.82 -1.85 V
4.7835 -0.80 -1.82 V
4.7873 -0.31 -2.03 I
4.7887 -2.27 -2.60 B
5.7792 -0.82 -1.86 V
5.7805 -0.30 -2.00 I
5.7819 -2.34 -2.71 B
c1: SAO 9.0K c2: SAO 10.4F
No apparent change for these three nights.
V-magnitude estimates (depending GSC sequence)
V1017 Sgr May 5.764 UT V=13.3
GU Sgr May 5.755 UT V=10.5
V348 Sgr May 5.758 UT V=11.9
chart for GU Sgr
N
*127
*136 *148 *137
*140
*124 o GU
*113
*143
*137
(based on 113 = GSC)
V3795 Sgr
Still not recovered yet. A close double of similar magnitudes.
The combined magnitude was V=13.8 on May 4.751.
N
*132 *142
*127 *143 *125
151* *147
*142
o V3795
119* *147
*136
*123
*139 *115
*146
field size 3' May 4.751UT V band 60sec
based on (119 = GSC)
Regards,
Taichi Kato
Return to the Powerful Daisaku
vsnet-adm@kusastro.kyoto-u.ac.jp
