Startup Night 12 - 20150914 UT

Observers: JHill, BRothberg, OKuhn (Tucson)
Telescope Operator: GBechetti (LBTO)
AO Support:
Telescope Support: (LBTO)
Software Support: CBiddick
Instrument Support: ESolheid (LBTO)
Engineering Support: DAshby

Summary

Preparations

Details

Light rain early. Opened briefly just before midnight.

Open

06:45 Open to a partly cloudy sky.

06:50 ACQUIRE preset

06:55 ACTIVE preset - BS9101 - seeing is 1.1 - 1.4 arcsec.

LDG Field Aberration Confirmation

07:03 ACTIVE preset - BS9188

07:08 field_collect on BS9188 - seeing is 1.1 arcsec and we are struggling with clouds.

07:18 clouds to thick after 1 off-axis star measured.

Close

07:19 Close for clouds

dofpia

on the LBC side

08:15: Implemented for science production a version of dofpia which uses a region of chip 2 that is below the rotator center and is less affected by chip non-flatness, especially for LBC-Red.

On 20150912, we obtained 10 different superfoc sequences at the reference filters, V-BESSEL and r-SLOAN. The best-focus on-axis was determined to be -0.02 for LBC-Blue at V-BESSEL (reference was already -0.02, so using this different region had no effect on blue) and 0.0 for LBC-Red at r-SLOAN (reference was 0.045). (Note: this focus offset is only affected in second order by which rows of the chip are being read out as the delivered LBC optical focal plane is quite flat. We interpret the shift for LBC-Red being due to moving away from the non-flat region of the chip.)

Copied existing leftchannelfocus.dat and rightchannelfocus.dat files (in /lbccontrol/current/conf) to leftchannelfocus.dat.bak.20150914 and rightchannelfocus.dat.bak.20150914.

Edited rightchannelfocus.dat file to subtract 0.045 from the filter focus offset of each filter.

run name	avg best-foc on-axis	std	nstars	run name	avg best-foc on-axis	std	nstars
SF_focb0a	-0.0066	0.0006	116	SF_focr0a	-0.0174	0.0017	105
SF_focb180a	-0.0657	0.0067	97	SF_focr180a	-0.0196	0.0020	97
SF_focb0b	-0.0083	0.0009	87	SF_focr0b	0.0151	0.0015	100
SF_focb180b	-0.0208	0.0020	109	SF_focr180b	0.0203	0.0018	124
SF_focb0c	-0.0024	0.0002	99	SF_focr0c	0.0352	0.0029	148
SF_focb180c	-0.0070	0.0010	54	SF_focr180c	0.0273	0.0019	218
SF_focb0d	-0.0256	0.0097	8	SF_focr0d	-0.0031	0.0010	11
SF_focb180d	-0.0417	0.0170	7	SF_focr180d	0.0022	0.0016	3
SF_focb0e	-0.0657	0.0328	5	SF_focr0e	-0.0369	0.0213	4
SF_focb180e	-0.0531	0.0177	10	SF_focr180e	-0.0163	0.0081	5

on the IDL side

In /home/lbcobs/LBCFPIA/lbcfpia/src

09/14 8:17 lbcobs@obs2 ~/LBCFPIA/lbcfpia/src$ ls -l dofpia*
-rwxr-xr-x. 1 lbcobs domain users 22302 Sep  6  2014 dofpia.20140906.pro
-rwxr-xr-x. 1 lbcobs domain users 22373 Nov 18  2014 dofpiacent.pro
-rwxr-xr-x. 1 lbcobs domain users 22369 Nov 18  2014 dofpialow.pro
-rwxr-xr-x. 1 lbcobs domain users 22363 Sep 14 08:14 dofpia.pro

• dofpia.20140906.pro is the last version of dofpia with the old "high on chip2" readout
• dofpialow.pro is the test version we've been testing for some months (just yesterday on-sky in decent seeing) with the lower readout
• dofpia.pro is the new production version which plays the obs to get the lower readout.

Those same files have also been copied to /home/lbceng/WRS/src which is the combined LBCFPIA and WRS directory. The same change is being made to dowrs.pro.

These are the new Perl scripts which load the OBs:

-rwxr-xr-x. 1 lbceng domain users 557 Apr  2 06:46 load-ob40low-blue.pl
-rwxr-xr-x. 1 lbceng domain users 559 Apr  2 06:45 load-ob40low.pl
-rwxr-xr-x. 1 lbceng domain users 557 Apr  2 06:45 load-ob40low-red.pl

These are the new OBs:

-rw-r--r--. 1 lbceng domain users 4378 Apr  2 06:35 B_V40lowextra.ob
-rw-r--r--. 1 lbceng domain users 4374 Nov 17  2014 B_Vlowextra.ob
-rw-r--r--. 1 lbceng domain users 4380 Apr  2 06:35 RB_rV40lowextra.ob
-rw-r--r--. 1 lbceng domain users 4376 Nov 17  2014 RB_rVlowextra.ob
-rw-r--r--. 1 lbceng domain users 4378 Apr  2 06:34 R_r40lowextra.ob
-rw-r--r--. 1 lbceng domain users 4374 Nov 17  2014 R_rlowextra.ob

The new "low" region is rows 1201-2608 while the old "high" region was rows 3201-4608.

-- %USERSIG{JohnHill - 2015-09-14}%