20231103

0510-0800

Bill, Katie, Tara, Roy

PHYS 401, 433C, Dome

1. Normal start-up procedures
2. Moved to Procyon
3. Focusing
   1. Starting Focus: 2611.4
   2. Ending focus is 2611
4. Achieving 15-17 pix FWHM
5. using phd2 autoguiding with RA tracking rate of 15.011 arcsec/sec
6. after we turned on autoguiding, the FWHM reported by sharpcap dropped to between 5 and 6.5 pix
7. saving all data to internal Z drive
8. On Procyon
   1. using subarray 1200×250 pan 48, tilt 914
   2. bin 1, mono16, .ser files, gain 279, brightness 40
   3. 2 sequences of 120s each in u and g filters, taken before timing calibration
   4. sequences also taken without .CameraSetting files
9. Moved to Venus
   1. Note, needed to disable autoguiding between sequences to adjust source in frame. Venus does not move with stars, so PHD2 guiding on stars doesn't keep Venus centered
   2. For all: TurboUSB at 100 (auto set to OFF) and High speed mode off
   3. U filter
      1. using subarray 1600×800 pan 48, tilt 640
      2. bin 1, mono16, .ser files, gain 279, brightness 40
      3. 2 sequences of 120s each in u filter, taken before timing calibration
      4. have .CameraSetting files
   4. G filter
      1. using subarray 1600×800 pan 48, tilt 640
      2. bin 1, mono16, .ser files, gain 100, brightness 40
      3. 2 sequences of 120s each in g filter, taken before timing calibration
      4. have .CameraSetting files
   5. Z filter
      1. using subarray 1600×800 pan 48, tilt 640
      2. bin 1, mono16, .ser files, gain 200, brightness 40
      3. 2 sequences of 120s each in z filter, taken before timing calibration
      4. have .CameraSetting files
   6. Another 2x120s in U
      1. Same settings as above
10. Slewed to LAWD 73 (GrW +708247)
    1. We expect this to be too dim to see with $12\mu s$ int time, so we slewed to something we could see (Polaris) to ensure pointing was correct. LAWD 73 is 13 mag, so we didn't want to just do a long exposure with the sky getting bright
    2. We call this process “Going In Blind”
    3. AND the SIMBAD ICRS RA & DEC were based on J2000, not J2023.5 (DFMTCS)
    4. We slewed to Polaris in J2023.5
    5. Then trusted that J2000 –> J2023.5 didn't change much with a proper motion of LAWD 73 at ~80mas/yr

• With ASI 178 pixel scale at $2.4\mu{m}/{pix}$, PICSARR should have angular res of $0.0317 pix/\mu{m} \times 2.4\mu{m}/{pix} = 0.076"/pix$
• Using DFM TCS and TS6 to give slew commands allowed scope to bypass limits on RA movement
  • This led to wires beginning to wrap – we need to pay attention to this in the future

At end of night

1. 9C in Dome
2. 4C ambient
3. -27.6C sky temp
4. 65% humidity