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.