Hi,
reading the message "Spectroscopy SIG Targets April_June I got a spectrum of NGC 4151 at UTC 04:00 on 04/04/2026. The total exposure time was 3600 seconds.
I measured the redshift and it gives me ~1000 km/s.
Rainer
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I annotated my NGC 4151 spectrum new as I found some errors there. The Ångström values correspond to the shifted value. Is this correct or should I use the original vale for each element? Thanks
Rainer
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I saw my spectrum of NGC 4151 was presented due to a question of Mike Murray in the SSIG meeting from April 8th 2026. Below the attached 1D fit file so Mike you can use it as a reference file for your files when processing them. Be aware that all lines have the redshift but not as exact as the professional spectra.My calculated redshift is at about 984 km/s cz(Helio) versus 997 km/s cz(Helio) according to this website.
Rainer
NGC_4151_300s_G125-0012-SP_BD_1D.fit (14.1 KB)