[vsnet-obs 20095] S obs of 12-13/4/99

[Berto Monard <LAGMonar@csir.co.za>]

Visual observations of 12-13 April 1999
observer: Berto Monard  MLF, Pretoria, South Africa
instruments: 32cm /f4.8 Newtonian
conditions: clear with haze

HYAEX   990412.96   128   MLF
CENBV   990412.96   130   MLF
CENV803   990412.966   142   MLF
CENV532   990412.98   122   MLF
CENV834   990412.97   <143   MLF
SCOU   990413.00   <143   MLF
SCOV818   990413.003   128   MLF
SCOV893   990413.001   144   MLF
SGRV1017   990413.03   138   MLF
SGRV1223   990413.04   130   MLF

PKS2005-489   990413.05   128   MLF

SGRNOVA1998   990413.03   124   MLF   *

CIRAE   990413.0   144   MLF
CIRAR   990413.0   146:  MLF
SCOCL   990413.0   122   MLF
SCOHK   990413.0   134   MLF
SGRV4074   990413.0   114   MLF
SGRV2905   990413.0   121   MLF
SGRV3804   990413.0   124   MLF
SGRV4018   990413.0   117   MLF
SGRV1988   990413.0   131   MLF     fading
SGRFN   990413.0   117   MLF
SGRV4368   990413.0   103   MLF
SGRV919   990413.0   134   MLF

NORRZ   990413.0   118   MLF     fading?
CRAWX   990413.0   <143   MLF
SGRGU   990413.0   103   MLF
SGRV1860   990413.0   121   MLF
SGRV1157   990413.0   112   MLF

* confirming that this nova is still bright in the visual (scotopic)
wavelength region, as T Kato did explain sometime ago! This and other
observations of this nova were made using the nearby reference stars
measured by A Henden in 1998, specifically those with magnitudes 12.3
and 12.5. These stars are reddish with B-V around 1.8 which makes them
look quite fainter than whitish stars of the same magnitudes. 
Perhaps observations of this nova with photopic vision (no dark
adaptation) would render fainter magnitudes for it as the comparison
stars would look relatively brighter.......

Regards,

Berto Monard
Pretoria

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