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Night Report 2014-04-21

Observers: Sandra Benitez, Joe Polshaw
Support: Matt Nicholl, Stephen Smartt
TAT on duty: Morgan Fraser, Nancy Elias-Rosa, Joe Anderson

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WEATHER CONDITIONS:
start: wind 1.7 m/s; temp. 15.4 C; humid. 21%; Clear. 
middle: wind 1.3 m/s; temp. 14.2 C: humid. 19%; Clear.
end: wind 4.4 m/s; temp. 14.8 humid. 14%; Clear

Conditions were photometric. The seeing fluctuated between 04:00 and 06:00 UT, between 1” to 1.5” and very briefly up to 2", then settled to ~1" for the rest of the night.

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INSTRUMENT: SOFI + EFOSC2

CALIBRATIONS

Afternoon:
 -- SOFI JHKs flats 

Morning twilight:
-- Sky flats: z
-- EFOSC2 bias, flats, arcs - we did not have time to do these in the evening since we began with SOFI. The TO should run them in the morning. ** To access the morning bias, spec flats and arcs on the ESO archive, search for the night 2014 04 22**

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OBSERVATIONS

Target                   Type                         UT-Start         Filter/Grism           Slit (")         Seeing (")      Notes

*** SOFI ***

ILL_S264-D           STD (Illum. mask)      23:26              JHKs                       N/A              0.58              (1)
LSQ14asn             Follow. (IMAG)           23:46              JHKs                       N/A               0.75             (2)

*** Change to EFOSC2 ***

SN2013dg              Follow. (IMAG)          00:50              r                             N/A             1.0                (3)
LSQ14aqz              Class.                       02:53              gr13                        1                1.0                (4)
EG274                   STD (SPEC)                03:10              gr11/13/16            1/1.5          1.0                 -
LSQ14azn             Class.                        03:44              gr13                        1                1.0                (5)
LSQ14an               Follow. (IMAG)           04:04             griz                          N/A            1.1                 -
LSQ14asn             Follow. (SPEC)            05:06             gr11                         1                1.2                (6)
LSQ14ayn             Class.                        06:44             gr13                         1                1.3                (7)
LSQ14aqn             Class.                        07:13            gr13                          1                1                  (8)
LTT7379               STD (SPEC)                07:46             gr11/13/16              1/1.5          1                   -                       
SN2009ip             Follow. (SPEC)            08:13             gr13                         1                 1                 (9)
LSQ14bcr             Class.                        09:57             gr13                         1                  1                (10)

(1) STD star observation with SOFI for the illumination mask.
(2) Forgot to update the field "exposure name" in the OB (so the files may be called "name_J.." etc.),
(3) There was a little bump to 1.2" in the DIMM seeing during the first 5 mins, then settled to 1", before fluctuating between 1" and 1.3". A satellite crossed the first image but should not be a problem.
(4) Gelato gives good fits to an old type Ic (anything from 60 to 150 days post-max). Very nearby (NGC 3287, ~22Mpc). 
(5) Normal type Ia, z~0.08, ~1 week after max, with some contamination from the host.
(6) The DIMM seeing was 1" to 1.5" during first exposure. It increased to ~2" for a very short while during the middle of the second exposure but dropped back to ~1.3" about 15 mins before the end.
(7) Normal SN Ia, 3 days to 1 week after max, z~0.077
(8) Normal SN Ia, about 2 weeks after max, z~0.09
(9) Began at high airmass. DIMM seeing ~1", but higher on acquisition image. Remained ~1" for the rest of the night.
(10) Into twilight. Noisy spectrum due to observing in twilight and reduced exposure time in order to fit it in. It's a Ia close to peak at z~0.07 to 0.09.

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