Spectrophotometry of type Ib/c SN 1997X: \ion He i lines near maximum light

Details Spectrophotometry of type Ib/c SN 1997X: \ion He i lines near maximum light Spectrophotometry of type Ib/c SN 1997X: \ion He i lines near maximum light

May 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998a%26a...333..159m&link_type=abstract

Astronomy and Astrophysics, v.333, p.159-162 (1998)

Astronomy and Astrophysics

Astrophysics

6

Supernovae: Individual: Sn1997X, Dust, Extinction, Galaxies: Individual: Ngc 4691

Scientific paper

Low resolution B&C+CCD (range 3600 Angstroms - 1.0 mu m) and high resolution Echelle+CCD (range 5800-8100 Angstroms) spectrophotometry of type Ib/c SN 1997X near maximum light is presented and discussed. The supernova is noteworthy in having presented absorption lines of He I at early phases (at an expansion velocity of 11000 km sec(-1) ). From the interstellar NaI D lines a reddening of E _{B-V}=0.18+/-0.02 mag has been derived, which arises in the host galaxy. From the emission lines of the underlying H II region, a density of N_e <= 100 and a velocity of RV_sun=1098+/-3 km sec(-1) are obtained.

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