Eric and all,
Many thanks for your interesting and really usful comments on SN1999by. I think I
calibrated the software incorrectly when measuring the mag. of the SN, will give it
another try later on. Summer is here now and there are no dark nights at all. I am
returning to my observatory in August, but in the meantime I hope to have my web
page ready....:-)
take care Alf J

Eric Schandall wrote:

> Alf,
> Have quite a few nights worth of images of this SN. I'm using a Pictor
> 416XT on a Meade 12". Just measured a 45 sec. exposure from last night,
> the 18th-19th. Not using any filters but with an Optec F3.3, the
> calibration being done on MaxIm-DL and comparing it to the AAVSO chart
> at
> http://www.aavso.org/alerts/alert258/NGC2841-E.GIF
> This gives me a Magnitude of 13.64. I believe this is pretty close as
> the other stars are the correct mag. when checked as reference to the
> calibration star's mag.
> This is new to me so forgive any ommissions of data. I used an unbinned
> image as it was a good evening. To shorten the download times I resized
> the image to NGC 2841 and a bit of the surrounding area.
> Am using a muffin fan on an extended arm from the wall of the
> observatory to help cool the main camera. It also dawned on me(an early
> dawn at that time of night) that it likely helps in cooling the Pictor
> 201 used on a 600 mm telephoto lense guiding shortish exposures. The fan
> can easily be aimed to take in both cameras.
> Regards,
> Eric

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