SN 2014J - 4 days worth

[jnp]

Conditions have improved allowing use of the slit spectrometer.  Here's a comparison of the same target, same evening, taken with the sa100. The sodium dip is evident.

Using a long transmission spectrometer without a flip mirror is a PITA on dim targets. If anyone has a spare 300 l/mm reflection grating then please let me know!

The chart below shows 4 days worth of sa100 spectra. Again I have done a quick scaling adjustment relative to a nearby star to get a meaningful indication of how the supernova is brightening.  The most recent profile has picked up the sodium dip.

Thanks for looking

John

[Gasman]

Cracking profiles there John, shows the changes in the SN very clearly! just proves how versatile the SA100 is.

Don't envy you trying to guide the slit without a flip mirror :-)

Steve