SN 2022hrs spectrum (13,0 mag)
- Meade SCT 0.25m f/6.3
- 4 x 1200 s exposure, Trius SX-825 camera
- Spectroscope SN-Spec II, dyspersja 25 A/piksel
- Date: 2022.04.21
- conditions: good
Classification was done with GELATO (Harutyunyan et al. 2008, A&A 488, 383):
fit to SN 2002bo type Ia (7 days before maximum).
Spectrum in DAT file: *** DOWNLOAD ***
Spectrum in 1D FIT file: *** DOWNLOAD ***
Expansion velocity estimating based on SiII blue shifted absorption feature:
Observed SiII(6355) wavelength ------> 6062A
NGC 4647 redshift ------> z = 0.0047
Expansion velocity ------> Vexp = c * (6062 - 6355 * (1 + z) / (6355 * (1 + z))) = -15160 [km/s]
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