From hpw@dogwood.nrl.navy.mil Tue Nov 18 16:42:37 2003
Date: Wed, 20 May 1998 15:20:54 -0400 (EDT)
From: Harry P. Warren <hpw@dogwood.nrl.navy.mil>
Reply-To: sumer-soft@esa.nascom.nasa.gov
To: sumer-soft@esa.nascom.nasa.gov
Subject: Re: SUMER-SOFT: sumer units


Dear David,

I believe that "line" refers to the total counts in the line (i.e.,
peak*sigma*sqrt(2!pi)) and is used to convert the total counts per
unit time to total line intensity. Other options are available for
converting the counts in a pixel to specific intensity (i.e.,
ergs/cm^2/s/str/A). Klaus just published a paper on SUMER's absolute
calibration which may be helpful:

@Article{wilhelm1998,
    author  = "{Wilhelm}, K. and {Lemaire}, P. and {Dammasch},
	       I. E. and {Hollandt}, J. and {Schuehle}, U. and
	       {Curdt}, W. and {Kucera}, T. and {Hassler},
               D. M. and {Huber}, M. C. E.", 
    title   = "Solar irradiances and radiances of UV and EUV lines
	       during the minimum of sunspot activity in 1996 ",
    journal = aa,
    year    = 1998,
    volume  = 334,
    pages   = "685--702"
}

You can download a pdf version from the A&A web site.

Good luck,

Harry Warren

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