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Night Report 2014-05-04

Observers: Sandra Benitez, Joe Polshaw
Support: Cosimo Inserra
TAT on duty: Maria Teresa Botticella, Emma Walker

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WEATHER CONDITIONS:
start: wind 3 m/s; temp. 12.8 C; humid. 21%; Clear
middle: wind 6.3 m/s; temp. 11.9 C: humid. 19%; Clear
end: wind 9.1 m/s; temp. 12.1; humid. 16%; Some cirrus

The night was mostly clear, but there was some cirrus in the morning.

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INSTRUMENTS: EFOSC2, SOFI

CALIBRATIONS

Afternoon:
-- SOFI dome flats

Evening
-- EFOSC2 UVi sky flats (May have been too late for some of the V- and i-band flats)

Morning:
-- EFOSC2 bias, spec. flats, arcs (We asked for these to be taken in the morning, but they were actually taken during afternoon of the next day)

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OBSERVATIONS

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

*** EFOSC2 ***

LSQ14bdq             Class.                        23:26             Gr13                       1                    0.6             (1)
CSS140424...        Follow (SPEC)             23:57             Gr11                       1                    0.8             (2)
CSS140424...        Follow (IMAG)            01.09             UBVRi                      N/A                1                (3)
CSS140421...        Follow (SPEC)             01:25             Gr13                       1                    1.1             (4)
CSS140421...        Follow (IMAG)            03:06             UBVRi                      N/A                1.1             (5)

*** CHANGE TO SOFI ***

Illum. Mask          STD (IMAG)                 03:52             JHKs                        N/A                0.8             (6)       
CSS140421...       Follow (IMAG)             04:12             JHKs                         N/A               1.1             (7)
CSS140424...       Follow (IMAG)             05:25             JHKs                         N/A               0.9             (8)

*** CHANGE TO EFOSC2 ***

LTT7379              STD (SPEC)                  06:17             Gr11/13/16             1/1.5            0.9             -
LSQ14bjh             Class.                         06:39             Gr13                         1                  1.1             (9)
PG1657                STD (PHOT)                07:13             UBVRi                       N/A               1               -
PG1633                STD (PHOT)                07:18             UBVRi                       N/A               1               -
Marka                   STD (PHOT)                07:24             UBVRi                        N/A               1               -
CSS140501...        Class.                        07:34              Gr13                        1                   1.             (10)
LSQ14bjb              Class.                        07:59              Gr13                        1                   1.             (11) 
SN2009ip             Follow (IMAG)             08:38             BVRi                         N/A               1.2           (12)
LSQ14bjb              Class.                        09:49              Gr16                        1                  1.3            (13) 
EG131                  STD (SPEC)                 10:30              Gr11/13/16             1                  1.1            (14)

(1) Very long rise-time (>30 days), hostless. Very blue spectrum with some lines in the blue. Could it be a SLSN?
(2) CSS140424-133007-212728. 2*1800s gr11
(3) CSS140424-133007-212728. 300s U, 45s B, 30s V, 20s Ri. Lost a small amount of time at the start of the OB since the telescope needed to be re-focused.
(4) CSS140421-142042+031602. 3*1800s grism 13
(5) CSS140421-142042+031602. U 2*250s, B 120s, VRi 60s (exptimes slightly reduced from the previous OB since we are running slightly behind schedule).
(6) Same OB as 2014-04-28
(7) CSS140421-142042+031602. 1080s J, 1440s H,Ks
(8) CSS140424-133007-212728. 400s J, 360s H, 720s Ks. Used the OB "JHK_J_16_0__17_5__gal_less90sec.obx".
(9) SN type II about a month after max., z=0.04211 (host spec.)
(10) CSS140501-170414+174839. A SN type Ia, probably normal, z~0.075 to 0.08, pre-max.
(11) Looks very faint in the acquisition image. Increased exp. time to 1800s. The seeing increased to ~1.5" during the OB. Looks very weird. Potentially super interesting - is it PS1-10afx like? Extremely red with very little emission in the blue. Will repeat with gr16 at the end of the night.
(12) Telescope re-focused. 5*200s BVi, 3*100 R (in order iRVB). Seeing began at ~1.2", but fluctuated between 1.2" and ~1.4" during the rest of the OB.
(13) Try LSQ14bjb again with Grism 16 this time to see if we can learn anything more. We planned to go for PSNJ23322284+1551106 here but it's very low, so will go for it on the second or third night.
1800s exposure - it is much brighter in the i-band acquisition image than V. Seeing began at 1.2 to 1.3", but increased to 1.5" during the exposure, then back down to 1.3". Observing into twilight. There seem to be a couple of narrow lines.
(14) Just did 1" slit since 1.5" was not used, and also observing well into twilight... Grism 13 probably useless (too late).

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