[vsnet-campaign-sn 249] (fwd) SN 2001el further brightening

[Taichi Kato <tkato>]

Date: Mon, 24 Sep 2001 10:21:34 +0200
From: "Berto Monard" <LAGMonar@csir.co.za>
Subject: [vsnet-alert 6687] SN 2001el further brightening

Hi,

I must admit, I am quite proud about the performance of this SN...

It has brighened nearly 2 magnitudes since discovery over a period of just =
more than a week.

This morning's observations

SN2001el   20010923.945   128   MLF
SN2001el   20010924.121   129   MLF

I would call on Southern observers to follow up on this SN. It might be =
near maximum now, but I will possibly not be able to do observations for a =
week, starting on 25/09..

You can use my posted sequence below or the AAVSO published one with =
chart, which is not so bad, except for the 'great' omission of the =
comparison star close to the galaxy, opposite the nova, which has a =
calibrated magnitude of 12.75 (0.6). SN 2001el present brightness is about =
the same as this star's.=20

The following stars can be used to estimate SNe near NGC 1448.

They are derived fron UCAC1 magnitudes and USNO-A2.0 B and R magnitudes =
(used mainly for colour indication).

The R magnitudes are preferably used to measure in the R band, which is =
approximately the case with CCD measures without any optical filter. Since =
SNe are expected to be blue it means that the SN V-value equals its =
R-value.

(2000) position RA / DE / Magnitudes

034407.8 -443551 / 13.8V / 13.4R
034413.6 -443909 / 14.5V / 14.4R  a blue star / good reference
034417.3 -443746 / 14.7V / 14.4R
034421.8 -443839 / 15.7V / 15.3R
034429.5 -443728 / 14.8V / 14.4R  close by but reddish
034437.8 -443934 / 12.75V / 12.39R *
* from Loneos data base

All magnitudes are estimated to be accurate to within 0.2 magnitude in =
both bands. The Loneos data are accurate to much better, approx 0.05 =
magnitude.

Kind regards,

Berto

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