|In NGS AO mode:|
Make sure that xguide is IDLE. Set the integration, and record image. The tool will automatically display the star in the sub-frame to the left, and a model to the right. The value for the FWHM is displayed on the tool. More values for the photometry is displayed in the xterm window.
|In LGS AO mode:
The tool shows up in this mode if the AO system is configured for LGS AO mode. Same use than in NGS-AO, make sure that xguide is IDLE. Set the integration, and record image. The tool will display more option to move the stages to be focused either on the NGS or for the LGS. It also gives the possibility to acquire manually the laser.
The AO operator may have to manually set WFS Neutral density filters to get the intensity
on the PSF star to match the one from the science target.
To set these WNDs, go to MAORI → WFS, click on the WND status display button and select a level of attenuation. There is no need to take a new background since the frame rate has not changed.
So, is it important??? the answer is:
Yes if the observer is doing long integration on the same object (NIRC2: spectroscopy, coronagraphy, looking for faint galaxies, etc. OSIRIS: in most cases since it is a spectrograph. IF: yes because their objects are a lot of time very red)
Not really in most cases. The observer would be doing short integration imaging. in those most common cases, make sure the B - V value is set within 0.3 - 0.5 and not set to an extreme value like -1 (very blue stars) or 2 (very red stars).
Image sequence showing misaligned image followe by images with several coarse moves. The red cross hair shows the position of the cursor for each coarse align step. The last image is a typical ACAM image of the spot when aligned. M3 ACAM image sequence
Xlib: connection to "polo:17.0" refused by server Xlib: Client is not authorized to connect to Server xrdb: Can't open display 'polo:17.0'
For the X axis,P1-Mtr5, Ix25 = 0xc2c010 means limits disabled and Ix25= 0xc0c010 means limits enabled For the Y axis,P1-Mtr6, Ix25 = 0xc2c014 means limits disabled and Ix25= 0xc0c014 means limits enabled.