More IRO
General Notes
Potentially, the ’N’ filter can see down to 20th mag on a good night. There is some fringing though that could interfere with an observation.
Otherwise, most filters can see 19th mag.
The Grism can see down to 14th to 15th mag, since the grism spreads the continuum light into multiple channels.
The sloan r’ and g’ filters have higher sensitivity than the X, V, and B filters, so the sloan filters are best used for photometry, whereas the X, V, and B filters are good for making trip-color images.
The Deimos program mk-mosic-shed will take a central RA and Dec and make a NxM field around it. This is useful for making mosaics of extended objects like nebulae which are larger than 28 arcmin, or for looking at clusters of galaxies.
The scheduling program understands SIMBAD names of objects. Essentially, if your object is in SIMBAD, you do not have to specify an RA and Dec.
Filter Codes
| Filter | Code | Notes |
|---|---|---|
| None | N | No filter |
| Red | X | 625 nm-690 nm; Used for making tri-color images |
| Visual | V | Used for making tri-color images |
| Blue | B | Used for making tri-color images |
| 300 Grism | 3 | 300 line per mm grim |
| H alpha | H | 656.3 nm |
| Oxygen III | O | 500.7 nm |
| Sulfur II | S | 671.6 nm |
| Longpass | W | 650 nm and up |
| Sloan g' | G | 401-550 nm; Used for photometry |
| Sloan r' | R | 560-695 nm; Used for photometry |
| 600 Grism | 6 | 600 line per mm grism |