From: Chris Lidman (clidman@eso.org)
Date: Tue Aug 24 2004 - 10:32:46 PDT
Hi Alex,
Thanks for the clarification. Your original e-mail was clear enough.
I just misread it.
Cheers, Chris.
On Tue, 2004-08-24 at 13:06, Alexander Conley wrote:
> Hi Chris,
>
> Sorry if I wasn't clear, but the B and V observations aren't from
> different dates -- they are always within 0.1 rest frame days of each
> other, and frequently even less. The color evolution over a span of
> 0.1
> days is way below my measurement errors.
>
> If I were ever to combine observations from different dates then it
> would be necessary to do some sort of study of how well CMAGIC
> works under such circumstances, or try to figure out how to apply
> a correction to B-V. If we ever want to perform CMAGIC with the
> ACS data that we have been obtaining recently, we will have to
> think about this. There is certainly no a priori reason why it can't
> be done -- it just needs to be thought about carefully.
>
> However, for THIS data sample, this makes no difference. I don't
> gain a single additional B-V point for any SN unless I am willing to
> combine points that are more than 7 days away from each other,
> and even then it only helps a very small number of SNe. I thought
> that 7 rest frame days was definitely pushing it a little, so I didn't
> perform the combination.
>
> Alex
>
> On Aug 24, 2004, at 6:36 AM, Chris Lidman wrote:
>
>> Hi Alex,
>> Thanks for the quick reply. As a follow up question, do you correct
>> the measured B-V colour in some way, since the B- and
>> V-band observations are taken at different dates?
>>
>> Cheers, Chris.
>>
-- European Southern Observatory Alonso de Córdova 3107, Vitacura Casilla 19001, Santiago 19 CHILEPh. +56 2 463 3106 FAX +56 2 463 3101
This archive was generated by hypermail 2.1.4 : Tue Aug 31 2004 - 17:24:27 PDT