Commissioning: 21 May 2010 UT

Observer: Andrew R, John H, Doug M Olga K (in Tucson)
Telescope Operator: SAllanson, WWack (in Tucson)
Telescope Support: Brian (LBTO)
Instrument Support: TShih (LBTO)
Adaptive Secondary Operator: Runa (LBTO)

Summary

Collected LUCIFER data to build an M2 Collimation model.

Preparations

8:00 after reverting to previous software build, reloading and reconfiguring for LBC we get started now. Adjusting pointing and collimation.

Details

All Lucifer image named luci.20100521.*.fits

Time	BS star	Image number	Elevation
08:58	9162	33	72
09:08	9166	35	55
09:19	9160	38	48
09:26	9155	40	33
10:01	9145	44	27
10:13	9156	46	39
10:24	9169	48	62
10:42	FS 149	52	80
10:55	FS 151	55	69
11:06	FS 149	58	85
11:25	9183	62	61
11:35	9182	64	52

Follow-up

JMH wrote to telescope work the following afternoon:

Dear Telescope,
        Following the Andrew et al. laser-tracker-based experiments of
the last three nights, I have restored the SX collimation and pointing
models to their traditional configuration.

Specifically:

1) The LUCIFER pointing model has been restored to
LUCIFERSX.20100501.ptmod

2) The LUCIFER PM collimation model has been restored to the contents
of SXPMLUCIFERCollimation.20100105.dat with the active file name
SXPMLUCIFERCollimation.dat .

(Yes, 0105 and 0501 are the correct dates, and not transposition typos.)

3) The LBC-Blue PM collimation model has been restored to the contents
of SXPMLBCCollimation.20100508.dat (which was the last update for the
hub shift to the summer position).  The active filename is of course
SXPMLBCCollimation.dat .

and finally unrelated to Andrew's activities,

4) I have updated the LBC pointing model LBCSX.20100521.ptmod to have
the current azimuth zeropoint of IA=-393 arcsec.  We saw a value
similar to this on 20100505, and I confirmed it was still true on
20100519 (although we were using Andrew's special M1 collimation model
at the time).  This particular value of IA is chosen to match the
LUCIFER pointing model from 20100501.

The LBC pointing model does need to be remeasured.  It has changed
since the azimuth absolute encoder has been fixed, and weight added to
the telescope has changed the elevation (tube flexure) term by several
(ten?) arcsec.

Ciao,
        John

M2 Collimation Model

hselect luci*.fits M2-X,M2-Y,M2-Z,M2RX,M2RY,TELALT,M1CTEMP,$I yes > /home/LBTO/M2.20100521_collimation.txt

-- DougMiller - 21 May 2010