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Date: 25 Aug 2006 12:47:46
From: canopus56
Subject: What is a C-band filter?
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I have been reading about a new currently visible Type I supernova,
2006SNej in Cetus (R.A. =3D 00h38m59s.77, Decl. =3D -09=B000'56".6), at the
Puckett Obs supernovae site:
http://www.rochesterastronomy.org/supernova.html#2006ej
Discovery image:
http://astro.berkeley.edu/~bait/2006/sn2006-n0191a.gif
Swift image:
http://lheawww.gsfc.nasa.gov/users/immler/SN2006ej/SN2006ej_Swift_UVOT.jpg
The reported magnitude is 14.7 in the "C" band.
I'm not familiar with this "C" filter band. What wavelengths does it
cover?=20
- Canopus56
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Date: 25 Aug 2006 14:44:18
From: atasselli@hotmail.com
Subject: Re: What is a C-band filter?
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canopus56 wrote:
> I have been reading about a new currently visible Type I supernova,
> 2006SNej in Cetus (R.A. =3D 00h38m59s.77, Decl. =3D -09=B000'56".6), at t=
he
> Puckett Obs supernovae site:
>
> http://www.rochesterastronomy.org/supernova.html#2006ej
>
> Discovery image:
> http://astro.berkeley.edu/~bait/2006/sn2006-n0191a.gif
> Swift image:
> http://lheawww.gsfc.nasa.gov/users/immler/SN2006ej/SN2006ej_Swift_UVOT.jpg
>
> The reported magnitude is 14.7 in the "C" band.
>
> I'm not familiar with this "C" filter band. What wavelengths does it
> cover?
>=20
>=20
C stands for Clear Filter, i.e. no filter at all.
Andrea T.
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Date: 25 Aug 2006 12:58:19
From: Stupendous_Man
Subject: Re: What is a C-band filter?
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canopus56 wrote:
> The reported magnitude is 14.7 in the "C" band.
>
> I'm not familiar with this "C" filter band. What wavelengths does it
> cover?
It means "measured with a CCD and no filter."
The effective wavelength depends on the particular
CCD sensor (and atmospheric conditions, to a much
lesser extent), but often lies somewhere between
the standard V and R passbands.
Michael Richmond
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