[AZ-Observing] Re: SQM readings
- From: "Jack Jones" <Telescoper@xxxxxxx>
- To: <az-observing@xxxxxxxxxxxxx>
- Date: Mon, 19 Mar 2007 20:46:31 -0700
You have to become comfortable with spreading light over an area rather than a
point source as a magnitude. You do this already when dealing with surface
brightness. Astronomers, who have to quantify everything or they are not
happy, picked the square arc-second (rather than say, a square arc-minute
which would be spreading it kinda thin).
Jack
----- Original Message -----
From: "Ken Sikes" <KGSikes@xxxxxxx>
To: <az-observing@xxxxxxxxxxxxx>
Sent: Monday, March 19, 2007 8:27 PM
Subject: [AZ-Observing] Re: SQM readings
Another good site explaining magnitudes per square arc-second
http://www.nightwise.org/magnitudes.htm
Ken Sikes
----- Original Message -----
From: "Peter Argenziano" <pargenz@xxxxxxx>
To: <az-observing@xxxxxxxxxxxxx>
Sent: Monday, March 19, 2007 8:19 PM
Subject: [AZ-Observing] Re: SQM readings
Ken, a Sky Quality Meter measures the sky darkness in magnitudes per square
arc-second.
More info here on the manufacturers website:
http://unihedron.com/projects/darksky/
Peter
----- Original Message -----
From: "Ken Reeves" <kreeves@xxxxxxxxx>
To: <az-observing@xxxxxxxxxxxxx>
Sent: Monday, March 19, 2007 8:08 PM
Subject: [AZ-Observing] Re: SQM readings
Pardon my ignorance, but what is an SQM and what is the scale of it?
Ken Reeves
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