S01-033
Holst

Keck LRIS Data files:

Date: 21 April 2001
Exposure time: 1200
Data reduced by: Isobel
Weather note:
Reduction notes.
Preliminary reduction: [asc] [fits]

Keck ESI Data files:

Date: 22 April 2001
Exposure time: 480s
Data reduced by: Isobel
Weather note:
Reduction notes.
Preliminary reduction: [asc] [fits]

VLT Data files:

Date: 21 April 2001
Exposure time: 1 x 1200s
Data reduced by: Chris
Weather note: Previously cirrus, now clear, but wind from the North is increasing. Seeing 2.1".
SN: [asc] [fits]
Sky: [asc] [fits]
Preliminary reductions: [smoothed ps] [unsmoothed fits]

Comments:

Chris (preliminary VLT): A type Ia at z~0.35. But the seeing was very poor.

Isobel (preliminary LRIS): z=0.36 from SN. No gal lines obvious. Try blue side?

Isobel (preliminary ESI): Poor S/N but z=0.36 SN OK. SiII feature possibly.

Isobel (preliminary VLT): z=0.36 from SN. Good Ia match. See Holst_snz.ps

Chris (final VLT): SN Ia z=0.363 OII from an offset trace

Andy (final VLT): This is certainly a Ia see the comparison to SN 1981b at: S01-033.81b.max.ps. You can tell it is a Ia from the Si II absorption at 5500 A, but note that you can't really see the main Si II feature at 8500 A. I don't think this is a problem, though because you can't really trust any of the spectra in the red (this spectrum has been S-G smoothed). The Keck data shows some hint of what might be Si II there, but it is hard to say without the final reduction.

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