[Aavso-photometry] Spectra of GE Reveal bulbs

[David Daiku Trowbridge]

Robin,

That's right, I have not corrected for the instrument spectral response. I
assume I would have to divide by the quantum efficiency of the KAF-0402 chip
in the ST-7 camera, such as that shown at
http://www.sbig.com/sbwhtmls/app_notes.htm
But I don't have the data for that curve. Any idea where one could find a
table of QE values vs. wavelength for this particular chip?

David

-----Original Message-----
From: Robin account [mailto:robin at leadbeaterhome.fsnet.co.uk] 
Sent: Friday, December 26, 2008 4:27 AM
To: David Daiku Trowbridge
Subject: Re: [Aavso-photometry] Spectra of GE Reveal bulbs

Hi David,

These are uncorrected for the instrument spectral response I would guess. It

shows the effect of the Neodynium glass nicely (I did not realise there was 
another absorption band in the IR)

Robin
www.threehillsobservatory.co.uk

----- Original Message ----- 
From: "David Daiku Trowbridge" <David at tinyblue.com>
To: "AAVSO Photometry" <aavso-photometry at mira.aavso.org>
Sent: Wednesday, December 24, 2008 7:13 PM
Subject: [Aavso-photometry] Spectra of GE Reveal bulbs


>
> To follow up on the discussion about GE Reveal bulbs, I used an ST-7E 
> camera
> on a DSS-7 spectrograph to obtain spectra for a 60W Reveal bulb and a 60W
> regular incandescent bulb, at full brightness and dimmed. The spectrum
> images were reduced and calibrated using a Neon calibration lamp. The
> spectra were generated using SBIG's Spectral Calibration Program. 
> Resulting
> graph is at:
>
>
>
> http://www.tinyblue.com/user/Reveal_Incandescent_bulbs.gif
>
>
>
> David Trowbridge
>
> Tinyblue Observatory
>
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