Log Book Entry No.87
Created: 03 Feb 2016 16:24:50 |
Last Revised: 03 Feb 2016 21:36:43 |
DavidHadden |
20160203 Observation |
Started data taking at 13:20.
cooler set to -15 degrees, ambient temperature 8 degrees
Sequence of:
- bias, (dark) 0.1 10, 30, 60, 90, 120
- Repeated every 30 minutes.
- Took a large piece of card and evenly illuminated it in order to take flat frames. In order to investigate the cooling ring/dust. Note that if the focus is changed this will have to be repeated.
- Had to place cover on telescope for dark frames, as an illuminative effect was seen.
- Ring appeared to be gone as of 15:10, took 01:50 taken to disappear.
- Bright border remains after above time.
- at 15:20 started taking 1 second dark and flat frames.
- 15:50 began taking master bias, dark and flat frames.
- Joined by Claire at 17:00
- We started observing at6pm
- We went Procyon and aligned the telescope using it.
- We looked at the Beehive cluster but there were not enough stars.
- We chose M39 cluster.
- Taaking images in no, red, blue, green, luminance filters.
- No filter: 60 sec exposure
- Red filter: bad target
- new targetr: ra: 2h43min07sec, dec:+47deg47arcmin01arcse3c
- nf 30s rf 120s bf 120s
- same cluster, new location: ra:2hr43min15sedc, dec:42deg49arcmin00arcsec
- nf 30s, bf 120s, rt 60s. Blue ewass terrible.
- new loc: ra: 2hr43min11sec, dec:42deg51arcmin30arcs
- nf: 30s, bf:90s, rf: 90s.
- new loc: ra 2hr43min21sec, dec 42deg56arcm50arcs
- nf 90s, bf failed. The stars were too dim.
- Finished at 21.31
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