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The exposure time is now 4 hours total.
Comparing to the previous 1 hour exposure there is now a noticeable reduction in noise and sharper emission peaks that allows a more accurate measurement of the redshifted hydrogen wavelengths.
The redshifted OIII wavelength is now visible above the noise level.
The redshifts are now z(H-Gamma)- 0.160, z(H-Beta)- 0.160, z(H-Alpha)-0.156.
Average z-0.159.
Steven
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