Observation by David Strange: Spectrum of SN2020hvf in NGC 3643

Uploaded by

David Strange

Observer

David Strange

Observed

2020 May 11 - 20:55

Uploaded

2020 May 12 - 20:58

Objects

NGC3643
Spectrum

Equipment

C9 + ZWO ASI 183MM
SA100

Exposure

30x30s

Location

Salcombe Regis

Target name

SN2020hvf

Title

Spectrum of SN2020hvf in NGC 3643

About this image

Files associated with this observation

sn2020hvf_20200511_dgsc.jpg (76.1 kB)

Like this image

Jeremy Shears, Dr Andrew Smith, Andy Wilson, Callum Potter, Graham Winstanley, Hugh Allen, Andrew Dumbleton

Comments

Hugh Allen, 2020 May 15 - 20:23 UTC

Hi David,

Nice spectrum of the supernova. To calculate the line of sight expansion velocity, don't forget to include the galaxy redshift in the calculation. NED is a good source http://ned.ipac.caltech.edu/byname?objname=NGC%203643&hconst=67.8&omegam=0.308&omegav=0.692&wmap=4&corr_z=1 So the wavelength of the Si II absorption line is actually bluer than your measurement by the redshift of the galaxy. This will make your expansion velocity even higher!

Cheers

Hugh

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