Observing Log Nov 22 2015

First half observers: Ian McGreer, Qian Yang

00:00 Dome opened, clear, low wind

00:45 Sky flats. First sequence of r+i, then two sequences of r+z. Seem to be affected by scattered moonlight.

01:10 Collimation

01:20 Copointing. First attempt failed. Trying again.

01:37 First science script (ri_01). Reduced r-band exposures to 3x100 and i to 4x60 to account for moon brightness. DIMM is reading 0.8". Getting more like ~1.0" in r-band and 0.7" in i-band.

02:13 First script finished. Collimating again.

02:19 Starting second script (ri_02). Changed i-band to 3x100 to match r-band, getting ~18K counts background. Now getting 0.6" in i, little better in r but still ~1". frame 02464 on the blue side has some trailing.

03:04 starting third script (ri_03) after another collimation and restarting LBC software to see if older revision fixes trailing issue.

03:48 starting fourth script (rz_01) after another collimation. Seeing ~0.7" in z band, and ~1.2" in r band. Reflection from moon light.

04:40 starting fifth script (rz_02) after another collimation. Seeing ~0.7" in z band, and ~1" in r band.

05:22 starting sixth script (rz_03) after another collimation. Seeing ~0.6" in z band, and ~0.9" in r band.

05:30 Lost tracking and stopped.

06:08 Copointing and Collimation.

06:12 starting sixth script (rz_03) again. Seeing ~0.4" in z band, and ~0.7" in r band.

06:55 starting seventh script (rz_04) after another collimation.. Seeing ~0.7" in z band, and ~0.8" in r band.

07:43 starting eighth script (rz_05) after another collimation. Seeing ~0.7" in r and z band.

08:25 starting ninth script (ri_04) after another collimation. Seeing ~0.8" in r and i band.

08:55 Stopped.

-- %USERSIG{EiichiEgami - 2015-11-22}%

Comments

 
Topic revision: r2 - 22 Nov 2015, EiichiEgami
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