Subsections

Puntino analysis

SH computer: 10.75.1.48 (port 5900) tom/nmsuhsp vnc: nmsu-hsp

Mount Puntino with spacers!

Move filter wheel to OPEN position!

Offsets and tilts

post-April 2012

Moved focal plane back 1.7 inches by installing spacer

mount SH with TOP towards CCD controller
should use metal spacers if possible to allow guider to focus!

star at (680,320) in guider at guideloc 1500, INST 2 puts star
  in SH at INST 1 after GOFFSET 50 0
  (so 630,320!)

set rotator at approx 10-alt to get spiders diagonal:
   positive x offset moves dots down
   positive y offset moves dots right
   S tilt --> +x    N tilt --> -x
   W tilt --> +y    E tilt --> -y

pre-April 2012

focus around -2000
guidefoc 300
star at (680,320) in guider at guideloc 1500, INST 2 puts star
  in SH at INST 1

set rotator at approximately 20-alt
then:
positive x offset moves dots to the right
positive y offset moves dots up
N tilt --> +y   S tilt --> -y
W tilt --> +x   E tilt --> -x

Analysis

120501

Start image 321

120426

reference 28 taken as test
reference 29 taken just before sunset

saw relatively poor SH results with coma and spherical, and astigmatism
jiggled primary --> coma changed significantly
moved secondary to remove coma, and spherical seemed to improve
moved tertiary to remove astigmatism, and spherical seemed to improve

looked at range of altitudes in the east, and coma didn't change by too much

ended up at xtilt 0.02, ytilt -0.54, tertiary 31900

120219

reference 26 taken as test
reference 27 taken just before sunset

120226
595,575 at inst=2
590,585


185-...  moved star, moved focus to more position (hit guider range)

193 new star at higher alt

put in 1.375 (2 wood + 1 metal), move guider to opposite end of range (0),
focus much more negative (~-6000) no chance of guiding

196 still not in focus, actually maybe this is good!
 worked on centering, see 212
213 moved focus -50
214 df 25 to focus=-5325, very nice
changed PA by 20 degrees

--> Looks like moving back 1-1.25 inches will be good!

111111

  moved primary, SH gave tilts of 0.16,-0.36 around alt=50-60

111103

alt 55
focus -2725
(0.06, -0.04)
  102   coma 1.8  -88  0.11 -1.80

(0.06, 0.01)
  103   coma 2.67 -88  0.08 -2.67       bigger ytilt -> more negative y coma

(0.06, -0.09)
  104   coma 0.59 -101 -0.11 -0.58

(0.06, -0.11)                        (is this correct?)
  105   coma 0.51 -8.7  0.50 -0.077  (weird y?)

(0.04, -0.11)
  106   coma  0.42 -77  0.09 -0.41      

(0.02, -0.13)
  107   coma 0.6 154    -0.54 0.26      smaller xtilt -> more negative x coma

(0.02, -0.11)
  108   coma 0.58 135   -0.41 0.41

(0.03, -0.10)
  109   coma 0.58 136   -0.41 0.40
      focus 8.39
df -50
  110     focus 10.41
df 150 to -2625
  111     focus 4.36
focus -2575
  112     focus 2.27
focus -2525
  113      focus 0.47
        coma 1.3 -120   -0.65 -1.13
repeat
  114     coma 
repeat
  115    coma 1.1 -121   -0.56 -0.94
(0.03,-0.12)
  116     coma 0.67 -157 -0.62 -0.26
(0.01, -0.12)
117     coma 2.02 -153   -1.78 -0.92
(0.05, -0.12)
118     crash
119     coma 0.87 -5.6   0.87 -0.08
(0.04, -0.12)
120     coma 0.33 -20.6  0.31 -0.11
altitude at 45

move to higher altitude 67
122  coma   1.32 -147
123 bad
124 bad
125  coma  1.64 -146   
offset
126  bad offset
127 bad offset
128 still off
129 still off
130  coma 1.77 -130



230, 57, -78
Procedure:

  set filter to open position
  GOTO 170,alt with INST=2, guideloc 1500
    move star to 660,380
    inst=0, find guide star and star guiding
  Determine PA to align spiders to diagonal  
    pa=20, rotator=-48 at alt=68
           rotate=-15   at alt=35
       rotator=20-alt
  (figure out which direction in guider corresponds to which direction in SH)A
    goffset +x  moves SH image right
    goffset +y  moves SH image up
  Center image and guide 
  Focus
  Take several mirror images
  Adjust xtilt and ytilt seperate to determine effects on coma

        focus  alt   tilt      focus    coma
0145,           70 0.04,-0.12
0146   -2990    67
0147   -2740                     9.44    1.59, 0
0148   -2590                     2.65    1.48, -3
0149               0.04, -0.08           0.55, 1.5
0150            66       -0.06           0.55, 23.8
   center a bit
0151
   newstar
0152            31   forgot INST 1
0153                bad PA, and bad pointing
0154                 forgot INST 1
0155                bad pointing
     guideinst 2 0 -40
0156                still off in x, missing spots on R
     guideinst 2 40 0
0157                                    2.29, -178 pointing OK, missing spots, dome?
0158                                               still vignetted
0159                                    2.85  -178

0160                0.04, -0.14         1.6   175
     moved dome manually +5 degrees
0161         worse vigetting?
     moved dome manually -5 degrees
0162          even worse!
     moved manuall +15
0163           disaster!
     back to dome slaving!
0164  

move to new star
0165            40
    guideinst 0 -50
0166               0.04                  0.66  123

move to new star
0167            62


2016-08-18