S02-075

VLT FORS2 Data files:

Date: 5 June 2002

Exposure time:

Data reduced by: Chris

Weather note:

z (gal):

z (SN): 0.79

SN: [asc] [fits]

line cleaned SN: [asc] [fits]

Output file from Andy's program: [txt]

Andy's 1st Comparison (Cleaned, 5A binned): SN 1992a(Ia), +17d, z=0.79 [ps]

Andy's 2nd Comparison (Cleaned, 5A binned): SN 1994I(Ic), +11d, z=0.79 [ps]

Andy's 3rd Comparison (Cleaned, 5A binned): SN 1992a(Ia), +9d, z=0.79 [ps]

Output file from Lifan's program: [ps]

Gemini GMOS Data files:

Date: 5 June 2002

Exposure time:

Data reduced by: Isobel

Weather note:

z (gal):

z (SN):

SN: [asc] [fits]

line cleaned SN: [asc] [fits] [ps]

Output file from Andy's program: [txt]

Andy's 1st Comparison (Cleaned, 5A binned): SN 1990N, -7 d, z=0.76 [ps]

Comments:

Chris (VLT, preliminary): The spectrum has a S/N ratio of 1-2 and there are no strong features.

Andy (VLT, preliminary): Looks like a Ia or Ic at z=0.79. Look at the similarity between the Ia and Ic in the comparison plots. Ia's and Ic's are so similar in this redshift range at this epoch that it is doubtful that we could tell the difference even with a perfect spectrum.

Isobel (Gemini, preliminary): The spectrum looks similar to the VLT one, i.e. quite noisy but clearly red. There are no obvious lines to get a redshift unfortunately.

Andy (Gemini, preliminary): The Gemini spectrum is noisier than the VLT FORS2 spectrum, so it adds no new information. The best fit was SN 1990N at -7 or -14 days, but we know from the light curve that that is not correct, the spectrum is later. Therefore, I don't trust the redshift either, z=0.76.

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