From: Piero Rosati (prosati@eso.org)
Date: Fri Jan 26 2007 - 08:27:45 PST
Ok, so this should be said in the caption, so the reader won't start
wondering about the scatter or use it in a negative way. We should
give the straight definition of n_gal and emphasize the demonstration
purpose of this plot. Again, more meaningful relations will come
using Xray/SZ physical parameters.
On Jan 26, 2007, at 4:58 PM, Henk Hoekstra wrote:
> Dear Anthony,
>
> I don't. I did a crude measurement of n_gal myself, in a fixed
> aperture and tried to incorporate the change in apparent
> magnitude. Not sure if Kyle did the same. In practice, however, I
> found doing this in more detail makes relatively little difference at
> this stage. Keep in mind that the plot is very preliminary. I must
> admit I was surprised to see how well it worked out!
>
> Cheers,
> Henk
>
> On Fri, Jan 26, 2007 at 09:47:19AM -0500, Anthony Gonzalez wrote:
>>
>>> By the way, n_gal is the number of early type galaxies in the ACS
>>> field (Kyle can correct me, as he measured it). I guess we need
>>> to define this in the figure caption.
>>
>> Is a correction applied to ngal for how far down the luminosity
>> function
>> the data probe at different redshifts, or is this a straight
>> measurement
>> from the ACS data?
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