[AstroPy] how to flatten an optical spectrum of a star

gonghang.naoc ghang.naoc at gmail.com
Tue Sep 2 07:45:26 EDT 2014


Thanks, Joe. Now I get it.
best
hang


On Tue, Sep 2, 2014 at 2:24 AM, Joe Philip Ninan <indiajoe at gmail.com> wrote:

> Hi Hang,
> I am not sure, i understand exactly what you mean by flattened spectrum.
> Are you talking about Continuum Normalised Spectrum?
>
> If so, you can do it in python, by dividing the original spectrum with a
> smooth curve, which is obtained by fitting the spectrum with a heavily
> smoothed spline OR low order polynomial.
> You can use scipy and numpy modules for it.
> -cheers
> joe
>
>
>
> On 1 September 2014 08:39, gonghang.naoc <ghang.naoc at gmail.com> wrote:
>
>> Hi all,
>> Sometimes we can see a star's spectrum is flattened. That is because we
>> have already known its black body continuum well and a flattened spectrum
>> can save space, right?
>>
>> A naive question is generally how to make that kind of spectrum?  Every
>> point is divided by its neighbours‘ values?
>> Is there any ready made python module to do that?
>>
>> Thank you.
>> hang
>>
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>>
>>
>
>
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