Changes
/* Sky flat recipe */
== Sky flat recipe ==
If the sky conditions are photometric is clear during morning/evening twilight, you will be able to take sky flats. If you're starting with the facility closed, all you need to do is:
# Follow the [[#Start-up recipes| start-up procedure]].
# Follow the appropriate [[#Instrument start-up |instrument setup procedure]].
This will result in a stationary telescope pointing out of the open shutters with open mirror covers. If the telescope is already up and running, dome and mirror covers open, follow this procedure:On the TCS '''Advanced tab''' - # On the central '''Dome''' panel, make sure '''Tracking''' is switched ON, # On the left-hand '''Telescope''' panel, click '''Park Telescope'''. <! -- # On the TCS '''Advanced tab''', left-hand side under '''Telescope''', enter 80 in the Altitude box and enter an Azimuth to face the telescope in the opposite direction to the rising (270) or setting (90) Sun. Click '''Slew'''. Wait for the telescope to reach position and for the dome to catch up (watch the schematic or the webcam).# Click telescope '''Tracking OFF''' below the Alt-Az Slew button (make sure the dome is in position first else it will stop en route - it only follows a tracking telescope).-->
# On the instrument PC, '''select the required filter'''. If you need flats in a variety of filters, be sure to cycle through them in the correct order (e.g. UBVRI during evening twilight; IRVBU in the morning). This also applies if you need a range of prebin settings (i.e. start with low binning in the evening; high to low binning in the morning).
# You can easily take a minimum of 15 flats in each filter/prebin setting with SHOC; Sibonise has longer readout times.
