Optical photometry and low-resolution spectroscopy of the SN 2014J
ATel #5843; Jonay I. Gonzalez Hernandez (IAC), Ricardo Genova-Santos (IAC), Jose Alberto Rubi~no-Martin (IAC), Pilar Ruiz-Lapuente (IFF-CSIC, ICC-UB)
on 1 Feb 2014; 18:03 UT
Credential Certification: Jonay I. Gonzalez Hernandez (email@example.com)
Subjects: Optical, Supernovae
Referred to by ATel #: 5876
We have obtained low-resolution spectroscopic data and broadband
(g,r,i,z) photometric images at the 4.2m-WHT equipped with the
instrument ACAM at the Observatorio del Roque de los Muchachos
(La Palma, Spain) on approximately January 28.13 UT.
A preliminary analysis of these spectra show the strong Si II (6355A)
line moving at ~12600 km/s, and CII (6580A) and SII (5468A) at ~13700km/s
and 12150 km/s, respectively.
The overall comparison of these spectra with those obtained
by Moreno-Raya et al. (ATel #5827), who provide a Si II (6355A) expansion
velocity of ~13400 km/s, suggest that SN 2014J is a low-velocity gradient supernova.
This is consistent with SiII moving at ~14100 km/s measured on January
23.75 UT reported by Bonev et al. (ATel #5829), and ~13900 km/s obtained on
January 23.05 UT by Altavilla (ATel #5818).