S01-005
Bizet / Seine

This SN was also observed by ESI but I do not know if that data has been reduced.

Keck LRIS Data files:

Date: 21 April 2001

Exposure time:

Data reduced by: Isobel

Weather note:

Reduction notes.

Preliminary reduction: [asc] [fits]

VLT Data files:

Date: 21 April 2001

Exposure time: 2 x 1200s = 2400s

Data reduced by: Chris

Weather note: Previously cirrus, now clear, but wind from the North is increasing. Seeing has degraded to 1.3" and is getting worse.

SN: [asc] [fits] [epoch 1 fits] [epoch 2 fits] [epoch 3 fits]

Sky: [asc] [fits]

Preliminary reductions: [smoothed ps] [unsmoothed fits]

Comments:

Chris (preliminary VLT): Difficult to say with this seeing and the heavy blending with a nearby galaxy.. Possibly a SN.

Isobel (preliminary LRIS): No lines but break at 6000A > z~0.46

Isobel (preliminary VLT): z=0.484? Weak SN features + break. Possibly galaxy absorption lines?

Chris (final VLT): SN Ia z=0.478 OII from an offset trace

Andy (final VLT): It looks like SN 1992A at +6 days. S01-005.92a.p05.ps was S-G smoothed. However, in a normal SN Ia there are 2 peaks in the 4000 A (rest) region, which is 6000 A in the observed Bizet spectrum. Bizet has 3 peaks. The third peak, at 6200 A (observed) usually gets strong a few days later, at around 10 days, but when that happens, the second peak decreases. Here, all 3 peaks are about the same intensity. I have never seen this.   It is possible that this is due to some artifact from night sky lines or galaxy subtraction, but this three peak structure is also seen in Bruch, at a different redshift.