night-report-2014-02-28

Observers: Heather Campbell, Nadejda Blagorodnova

Support team: Morgan Fraser

TAT: Joe Anderson, Maria Teresa Botticella

Weather:

Moon down during all night

Beginning night: Humidity 40%, wind 5 - 10 m/s, DIMM seeing 1", pretty cloudy, non-photometric.

Middle of the night: Humidity 40%, wind 15 m/s, DIMM seeing 1.2", clouds cleared.

End of the night: Humidity 50%, wind 10 m/s, DIMM seeing 1.2", no clouds.

Observations:

23:50 No skyflats taken, as the sky looked pretty cloudy.

23.55 Telescope focusing

00:07 L745a - spectrophotometric standard

00:34 PS1-14od

Classification 600s, Gr#13. SNID classification is a IIb, z=0.14, pre-max. Emission in Ca II

00:50 SKY_J1353283-5757506 (1h 30m)

Humidity 45%. Beginning of exposure: target at airmass 1.3 and seeing around 1.5". Middle: airmass 2.4 and seeing 1.". End: airmass 2.87 and seeing 1.2"

2x1200s in Gr#11 and 2x1200s in Gr#16 taken.

02:30 PS1-14mm

30s and 60s in V did not reveal the target. It has been aborted. Checked for NEOs, but: No known minor planets, brighter than V = 20.0, were found in the 15.0-arcminute region around R.A. = 05 56 32.33, Decl. = +09 34 53.3 (J2000.0) on 2014 02 21.00 UT.

02:37 OGLE-2014-SN-023

1x2700s Gr#13 Exposure.

The emission at 8400A is gone. Looks like a nice CV with Balmer absorption lines, and some little emission in H alpha. Has small emission associated with S.

03:32 LSQ14xm

1500s Gr#13 Classification - SN Ia around max at z=0.16

04:05 LSQ14pt (1h 40m)

3x1800s Gr#16 Taken.

05:50 Telescope focus

05:57 LSQ14aao

The target has moved around 17 arcsecs since the position on 27 of Feb.

06:08 LSQ14zz

900s Gr#13 Classification - SN Ia pre-max at z=0.045

06:26 SN2013bb

We had trouble identifying the target with 30s exposure in V. Finally we took 60s in R filter to identify it.

1x2400s. The exposure revealed poor S/N. The wind is 15 m/s and the seeing dropped to 1.5". As there was very little signal on the first spectrum, we decided to abort and return tomorrow.

07:32 LSQ14zu

With 120s exposure in the acquisition image, the target was not visible, so we gave up.

07:46 PS1-14oo

900s Gr#13 Classification - SN Ia, best match with subtype 91T, z=0.05 at pre-max.

08:20 PS1-14mv

1200s Gr#13 Classification - Taken with slit 1.5", as the seeing on the acquisition image is 1.6".

Another wonderful SN Ia, +2 weeks, z=0.14

08:00 Humidity 60%, DIMM seeing 1", wind 10m/s

08:45 PS1-14oa

900s Gr#13 Classification. Taken with slit 1.5", as the seeing on the acquisition image is 1.6". SN blended with host galaxy.

SN II at z=0.3 (measured from the galaxy emission lines), around +5d.

09:09 LSQ14yf

1200s Gr#13 Classification. Another SN Ia, +5d at z=0.18.

09:10 Twilight

09:44 EG274 - spectrophotometric standard

10:01 Skyflats grz

Aborted, as the flats contained too many stars. Then the sky was already too bright.