LBBG Commissioning with AGW1: 03 November 2011 UT

Observer: JHill, JHeidt, RPogge (LBTO) DMiller (Tucson) JStorm (Potsdam)
Telescope Operator: DHuerta (LBTO)
Telescope Support: RHansen (LBTO)
Instrument Support: JMorris (LBTO)

Summary

Rick wants to switch to taking MODS1 data in this photometric weather with 0.5 arcsec seeing, but we wouldn't let him. smile

The last X-flip correction (pcsmx) from last night has been verified.

On-axis active optics is now working for both GCS and IDL. Off-axis active optics has passed the initial check, but not detail calibrations. Something is making far off-axis active optics diverge in GCS.

The Focus position on the IRTC (relative to WFS) has been verified.

We started collecting transform data, and uncovered a couple minor bugs in IDL.. We got an initial transform data set of 17 stars on Stone_A2. Rick processed the data and Jesper made a new transform for us.

We got a set of field data on BS9107 in superb seeing, but had a lot of trouble because the rotator reports ready while it is still moving. There also seem to be some active optics problems (unspecified) with the field_collect script.

We worked a bit on M3 aligment, but didn't find any position better than what we had. We installed our M3 positions into oss.conf to make collimation go faster.

Preparations

cp -p AIP_L_RM_sub11.cfg AGW1_IRTC_RM_sub11.cfg (it had previously duplicated RFBG zernike gains which are different). This was why GCS active optics diverged in coma last night.

LBTI has retroreflector on M2 on the right side for continuing adaptive optics calibrations.

Michele gave us a patch to PCS related to rotator RPC errors.

Details

Open

00:42 Open to some gorgeous photometric weather. T=5.7 degC, D=-33.5 degC, Wind steady at 6 m/sec from WNW.

ACQUIRE preset to pointing star. Had to enable RZ collimation (whenever we have the global offset).

01:02 ACQUIRE preset to BS9183 - Why is the star significantly out of focus? This collimation model has been magnificent until now. David had to add 0.6 mm to M1 Zglobal. Temp1=5.93 Temp2=3.14. Could be that the mirrors are cold from last night.

01:12 GUIDE preset gs=1 PA=INDEF=30 - OK x=0 y=562

01:14 GUIDE preset gs=1 PA=60 x=-24.9 y=569.2 - OK pcsmx flip is OK

Initial Active Optics Comparison

01:17 ACTIVE preset gs=0 on-axis - converges quickly to 0.5 arcsec (5 iterations)! But image is slightly triangular (seeing is better than 0.5 arcsec and Z9 - Z10 are crosstalking).

Jochen starts eavesdropping WFS analysis in IDL using gcs_wfsc_display. This allows us to compare GCS and IDL results.

01:30 +200 Z9

/Repository/20111103/GCS/left_wfscimage000020.fits

                Measured         Rotated           Field                           Scaled to
  Zern #    (Center-of-Weight)  to Primary       Correction         Total         Send to PSF
                IDL    GCS       IDL    GCS       IDL    GCS       IDL    GCS       IDL    GCS
  -----------------------------------------------------------------------------------------------
  Z[ 2] =        46   -567        45 -32768         0      0        45 -32768         0      0
  Z[ 3] =        23   -841        25 -32768         0      0        25 -32768         0      0
  Z[ 4] =       -67    -55       -67    -55         0      0       -67    -55        81     66
  Z[ 5] =       -37      7       -30     10         0      0       -30     10       -41     14
  Z[ 6] =        81     38        84     37         0      0        84     37      -108    -48
  Z[ 7] =        -4      3        -1      5         0      0        -1      5         2     -6
  Z[ 8] =        57     68        57     68         0      0        57     68        64     76
  Z[ 9] =         5    -53        14    -53         0      0        14    -53        19    -72
  Z[10] =        67      1        66      8         0      0        66      8       -90    -11
  Z[11] =       -11    -20       -11    -20         0      0       -11    -20        11     21

01:36 -200 Z10

/Repository/20111103/GCS/left_wfscimage000030.fits

                 Measured         Rotated           Field                           Scaled to
  Zern #    (Center-of-Weight)  to Primary       Correction         Total         Send to PSF
                IDL    GCS       IDL    GCS       IDL    GCS       IDL    GCS       IDL    GCS
  -----------------------------------------------------------------------------------------------
  Z[ 2] =        36   -345        36 -32768         0      0        36 -32768         0      0
  Z[ 3] =        30   -894        30 -32768         0      0        30 -32768         0      0
  Z[ 4] =       -66    -68       -66    -68         0      0       -66    -68        79     81
  Z[ 5] =       -44     39       -45     40         0      0       -45     40       -61     55
  Z[ 6] =        11    -55        10    -54         0      0        10    -54       -13     69
  Z[ 7] =        -6    -30        -7    -30         0      0        -7    -30         8     34
  Z[ 8] =        18     19        17     19         0      0        17     19        20     21
  Z[ 9] =        20    -19        19    -16         0      0        19    -16        27    -23
  Z[10] =        21    -86        22    -87         0      0        22    -87       -30    118
  Z[11] =        -7      4        -7      4         0      0        -7      4         8     -4

01:48 +1500 Z5

/Repository/20111103/GCS/left_wfscimage000050.fits

                 Measured         Rotated           Field                           Scaled to
  Zern #    (Center-of-Weight)  to Primary       Correction         Total         Send to PSF
                IDL    GCS       IDL    GCS       IDL    GCS       IDL    GCS       IDL    GCS
  -----------------------------------------------------------------------------------------------
  Z[ 2] =        33   -562        34 -32768         0      0        34 -32768         0      0
  Z[ 3] =         9     25         5 -32768         0      0         5 -32768         0      0
  Z[ 4] =      -141   -161      -141   -161         0      0      -141   -161       170    193
  Z[ 5] =      -674   -820      -719   -865         0      0      -719   -865      -977  -1176
  Z[ 6] =       277    293       123    107         0      0       123    107      -157   -137
  Z[ 7] =        -7     -9       -13    -17         0      0       -13    -17        14     19
  Z[ 8] =        47     68        46     67         0      0        46     67        51     75
  Z[ 9] =         2    -51        -4    -31         0      0        -4    -31        -5    -42
  Z[10] =        20    -53        20    -66         0      0        20    -66       -27     91
  Z[11] =        27     53        27     53         0      0        27     53       -28    -55

01:54 -1500 Z6

/Repository/20111103/GCS/left_wfscimage000061.fits

                 Measured         Rotated           Field                           Scaled to
  Zern #    (Center-of-Weight)  to Primary       Correction         Total         Send to PSF
                IDL    GCS       IDL    GCS       IDL    GCS       IDL    GCS       IDL    GCS
  -----------------------------------------------------------------------------------------------
  Z[ 2] =        34    122        34 -32768         0      0        34 -32768         0      0
  Z[ 3] =         0   -810        -5 -32768         0      0        -5 -32768         0      0
  Z[ 4] =       -91    -40       -91    -40         0      0       -91    -40       110     48
  Z[ 5] =      -286   -280       -97     -3         0      0       -97     -3      -133     -5
  Z[ 6] =      -549   -830      -612   -876         0      0      -612   -876       783   1122
  Z[ 7] =        -3    -30        -3    -32         0      0        -3    -32         4     36
  Z[ 8] =         0     14         0      9         0      0         0      9         0     11
  Z[ 9] =       101     74        84     84         0      0        84     84       115    114
  Z[10] =        10    -39        56      0         0      0        56      0       -76      0
  Z[11] =       -16    -36       -16    -36         0      0       -16    -36        17     37

After talking to Doug, I'll bet we have the wrong reconstructor in IDL. (sextractor test version)

NOTE: The correct reconstructor is being used. I did switch off subtraction of reference centroids and it improved things a bit. I turned on subtraction of the background and the results got worse. I thought Torsten had background subtraction on in GCS so I don't understand why the IDL results go worse. DLM 20111104

Z4,Z5,Z6 have effective gains about x2 lower than GCS. Z9,Z10 are down by x3-x4. (we didn't test Z7, Z8,Z11)

I don't see any evidence of crosstalk between the mode pairs.

Focus of IRTC

Unrestrict DD variables for LBTtools.IRTC.takepic

In the DD variable list called by takepic, there is an obsolete entry.
Thu Nov  3 02:09:33.448 2011  GetMultiDDEntry alert for left IRTC: Offset not found: ecs.weatherStation.smt.ambientTemperature
The actual variable is env.weather.smt.....etc.
Dave fixed this, but reminds us that the IRTC subpackage in LBTtools is obsolete.

Can't see BS9183 star on IRTC. It looks like the IRTC cooler isn't working. Rebooted IRTC Windows PC. That fixed the problem, but the problem wasn't necessarily the cooler.

02:26 ACQUIRE preset to Stone_O

ACTIVE preset to Stone_O - seeing is 0.45 arcsec on guider. We continue to lose ~30% of WFS images.

TRACK preset to Stone_O

02:48 Start of data from focus_seq.cl (headers on the single images only) Raw images in /newdata/
-rw-r--r-T 1 nfsnobody nfsnobody  178560 Nov  3 02:47 irtc.20111103.024732.fits
-rw-r--r-T 1 irtc           1142 4919040 Nov  3 02:48 irtc_20111103.20111103.00001_cube.fits
-rw-r--r-T 1 nfsnobody nfsnobody  178560 Nov  3 02:48 irtc.20111103.024843.fits
-rw-r--r-T 1 irtc           1142 4919040 Nov  3 02:49 irtc_20111103.20111103.00002_cube.fits
-rw-r--r-T 1 nfsnobody nfsnobody  178560 Nov  3 02:49 irtc.20111103.024956.fits
-rw-r--r-T 1 irtc           1142 4919040 Nov  3 02:50 irtc_20111103.20111103.00003_cube.fits
-rw-r--r-T 1 nfsnobody nfsnobody  178560 Nov  3 02:51 irtc.20111103.025108.fits
-rw-r--r-T 1 irtc           1142 4919040 Nov  3 02:52 irtc_20111103.20111103.00004_cube.fits
-rw-r--r-T 1 nfsnobody nfsnobody  178560 Nov  3 02:52 irtc.20111103.025221.fits
-rw-r--r-T 1 irtc           1142 4919040 Nov  3 02:53 irtc_20111103.20111103.00005_cube.fits
-rw-r--r-T 1 nfsnobody nfsnobody  178560 Nov  3 02:53 irtc.20111103.025334.fits
-rw-r--r-T 1 irtc           1142 4919040 Nov  3 02:54 irtc_20111103.20111103.00006_cube.fits
-rw-r--r-T 1 nfsnobody nfsnobody  178560 Nov  3 02:54 irtc.20111103.025446.fits
-rw-r--r-T 1 irtc           1142 4919040 Nov  3 02:55 irtc_20111103.20111103.00007_cube.fits
-rw-r--r-T 1 nfsnobody nfsnobody  178560 Nov  3 02:56 irtc.20111103.025559.fits
-rw-r--r-T 1 irtc           1142 1641600 Nov  3 02:56 irtc_20111103.20111103.00008_cube.fits

Focus Analysis - measured stars on a stack of the cubes with median sky subtracted from the stack. Stars measured as 2D Gaussians:
   #
   # IRTC Focus Cube Reduction - Gaussian Fit to irtc_focplate.fits
   # Source images irtc_20111103.*.000Img_cube.fits
   # 2011 Nov 3 UTC [rwp/osu]
   #
   #Img  m2foc    x      y     Peak  fwhm    sky    maj   min    phi
    001  0.045  314.4  155.2   2700  8.08   431.4   8.08  8.08     0
    002  0.030  265.4  149.9   4871  5.92   427.6   5.92  5.92     0
    003  0.015  216.5  142.9   7239  4.39   421.3   4.39  4.39     0
    004  0.000  169.7  135.1   5905  4.58   422.1   4.70  4.45    55
    005 -0.015  121.0  126.0   6944  4.68   424.4   5.25  4.17   108
    006 -0.030  129.5   79.5   3854  6.18   427.2   6.38  5.99   123
    007 -0.045  141.2   34.1   2344  8.61   402.8   8.61  8.61     0
The focus curve is basically symmetric, bottoming out on the middle 3. Best focus consistent with the 0.00 offset. Present AGW focus setting is 31.6 in AGW1_IRTC.cfg. Data are in /OldRepository/IRTC_Data/20111103_IRTC/

Removing the M3 selector slowness from collimation updates.

oss.side[0].terc.focal_stations.bentGregorianBack string "-915.0 880.0 0.0 -25.789"

02:59 ACQUIRE

Remove global offsets from M3. Stop and restart OSS. Tell OSS to move to focal station. Collimate M3. Disable RZ collimation.

Transform Data on Stone_O (test)

Jochen created .list file for Stone_O for LBBG at PA=180 as the other list was for star appropriate for MODS at PA=0.

The first off-axis active preset converged OK with GCS.

03:30 transform_collect, /GCS had a problem with the IRTC argument to instrument_........ Called Doug for a patch. Doug fixed that in 10 minutes.

Then transform_collect choked when fits_gcs_to_struct failed to find a .info file for a .fits image which was bogus.

Field Aberration Data (test)

Also choked when fits_gcs_to_struct failed to find a .info file for a .fits image which was bogus.

04:00 a new airmass arrives with higher dewpoint and worse seeing, 1.2 arcsec

M3 fine alignment (or not)

04:27 ACQUIRE preset to pointing star, and offset the star out of the field

wfsc 004 (sky, before we moved)

Apply to SX M3 Global RZ to -0.4 (absolute= -26.189) IE=-172 CA=-37

wfsc 005 (sky, much better centered on the lenslet array)

04:39 GUIDE preset on-axis to Persson star BS9107 PA=0

wfsc 006 (star)

04:43 offset 0 0 ROT=90

wfsc 007 (star)

04:45 offset 0 0 ROT=90

wfsc 009 (star)

04:47 offset 0 0 ROT=90

wfsc 011 (star)

This has a wobble of about 3 lenslets - not an improvement. Thus we return to our selector position adopted last night of -25.789.

04:54 on-axis ACTIVE preset failed

04:55 repeating same preset succeeded with star in different place in acq image. Looks like rotator is reporting ready while still moving. Issue 3774.

Transformation Data on Stone_O (take 2)

LEFTZEROPOINT is 114.8

05:00 back to Stone_O for transformation data, but still some IDL bugs

06:14 another try at transform_collect, /GCS still on Stone_O at EL=25 degrees. The bugs are getting more subtle, as it crashed only when there were three bad WFS images in a row. Images are 0.75 arcsec at EL=23.3 degrees.

06:28 transform_collect, /GCS

Transformation Data on Stone_A2

06:40 Coma diverged off the Y-axis when we came back from EL=23 to EL=53. Cleared corrections and try again.

06:46 Clear Active Optics on both mirrors.

06:47 ACTIVE preset on-axis to recollimate - guider seeing is 0.55 arcsec.

06:51 transform_collect, /GCS

Even from a good starting point, GCS active optics diverges badly at x=68 y=542

06:57 ACTIVE preset on-axis to recollimate, Clear Active Optics on M2 and M1

07:02 transform_collect, /GCS but now David will block sending of zernikes to PSF. Guider seeing is 0.4 arcsec at EL=50 deg.

07:20 transform_collect stopped at star 5, PA=180, not clear why, suspect is rotator not yet ready

07:22 Redo: transform_collect, /GCS, limit=4000, STAR=3, failed again, star seems not to exist, restart with STAR=4, failed also, preset on-axis, redo, OK, star is there

07:35 transform_collect Stone_A2_LBBG, /GCS, LIMIT=4000 Seeing is excellent, we'll try to collect quite a few transformation data

07:46 recollimate, on-axis, continue with Stone_A2_LBBG, PA=90

07:57 star 13 was out of reach at PA=90. continuing, stopped after 17th star at PA=180

Data:

GStar wfsc # Single Image Cube Image
0 0 irtc.20111103.073746.fits irtc_20111103.20111103.00033_cube.fits
7 397 irtc.20111103.073909.fits irtc_20111103.20111103.00034_cube.fits
21 400 irtc.20111103.074037.fits irtc_20111103.20111103.00035_cube.fits
20 402 irtc.20111103.074308.fits irtc_20111103.20111103.00036_cube.fits
GStar wfsc # Single Image Cube Image
1 417 irtc.20111103.075433.fits irtc_20111103.20111103.00037_cube.fits
9 418 irtc.20111103.075604.fits irtc_20111103.20111103.00038_cube.fits
GStar wfsc # Single Image Cube Image
2 420 irtc.20111103.075952.fits irtc_20111103.20111103.00040_cube.fits
16 422 irtc.20111103.080122.fits irtc_20111103.20111103.00041_cube.fits
18 423 irtc.20111103.080319.fits irtc_20111103.20111103.00042_cube.fits
7 424 irtc.20111103.080449.fits irtc_20111103.20111103.00043_cube.fits
17 426 irtc.20111103.080617.fits irtc_20111103.20111103.00044_cube.fits
GStar wfsc # Single Image Cube Image
4 431 irtc.20111103.081136.fits irtc_20111103.20111103.00046_cube.fits
1 440 irtc.20111103.081259.fits irtc_20111103.20111103.00047_cube.fits
9 441 irtc.20111103.081638.fits irtc_20111103.20111103.00048_cube.fits
13 444 irtc.20111103.081803.fits irtc_20111103.20111103.00049_cube.fits
2 445 irtc.20111103.082034.fits irtc_20111103.20111103.00050_cube.fits
16 446 irtc.20111103.082203.fits irtc_20111103.20111103.00051_cube.fits
18 448 irtc.20111103.082327.fits irtc_20111103.20111103.00052_cube.fits

Data were measured with the IDL program transform_process_set, see file transform.dat attached below.

Field Aberration Data on BS9107

08:26 Preset to BS9107, on-axis, collimate (Guider reports 0.3")

08:36 field_collect BS9107_fieldnew failed (see ISSUE 3774)

08:40 redo field_collect BS9107_fieldnew, when going to star 2, failed again, seems that we have to do it one by one

08:49 redo field_collect BS9107_fieldnew, STAR=2, didn't collimate within 3 cycles (bad WFSC-images), redo,

09:32 redo, now john_collect BS9107_fieldnew, STAR=7, (modified field_collect does a preset=track before)

09:53 Star 7 won't work for whatever reason, skip that and continue with Star 8

09:59 john_collect BS9107_fieldnew, STAR=8

10:10 john_collect BS9107_fieldnew, STAR=9

10:33 john_collect BS9107_fieldnew, STAR=10

11:01 john_collect BS9107_fieldnew, STAR=12

11:13 john_collect BS9107_fieldnew, STAR=13

11:45 john_collect BS9107_fieldnew, STAR=15

INSERT LOGFILE HERE BS9107_fieldnew_field.log

13:00 Despite 1h of attempts it was not possible to catch aberration data with GS 15! The WFS got crappy on a regular basis, the error message was always the same:
 255 nm rms error in image left_wfscimage000648.fits (rms error varied)
 
 => Running collimate_process: /Repository/GCSfiles/dailyimages//left_wfscimage000648.fits

  => Collimated in 2 iterations (sometimes collimated in 1 iteration)

% Program caused arithmetic error: Floating illegal operand

JMH (20111123): Andrew's verbal report on this field data was that there was a slight focal plane tilt, but no serious problems.

Evaluating the new transform

11:50 Installed Jesper's new transform as oacontrol.conf. Jesper wrote:
  I have computed a new transform assuming the hotspot on the IRTC to be at
(x,y)=(156,137.5). I had to remove three bad stars but then the fit was below
50microns RMS. If I use only the data with PA=180 the RMS gets below
30microns.

  The revised config file is in the home directory of the agwuser account with
the name: /home/agwuser/oacontrol.conf.20111103a
and you can install it at your convenience.

11:57 added WFS_lenslet_rotation -1.06 double # degrees of rotation between lenslet array grid and the CCD pixel grid on the WFS camera
to AGW1_IRTC.cfg

13:05 Some nice "fish egg" images on the WFS for checking lenslet alignment.

Close

13:10 Closing dome for impending dawn T=3.5 degC, D=-10.8 degC, Wind 10 m/sec steady from SW.

-- JohnHill - 03 Nov 2011
Topic attachments
I Attachment Action Size Date Who CommentSorted ascending
transform.datdat transform.dat manage 3 K 03 Nov 2011 - 10:23 RichardPogge AGW transformation data from transform_process_set
Topic revision: r18 - 06 Dec 2011, JohnHill
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