TrevorW
14-03-2009, 01:31 PM
Target: NGC4372
Camera: Canon 350d modified
Exposure Capture: DLSR Focus
Scope: SV80ED
Mount: EQ6 Pro
Exposure Setting: Prime focus, ISO800 ICNR off Daylight WB
Exposures: 20 x 90s 13/03/09
Seeing: Average although 90% Gibbous moon
Guiding: Orion Starshoot Autoguider using PHD, although my alignment was out
Focus: DSLR Focus
Stacking: DSS, 10 darks, 5 flats applied
Processing: PS7
Info: Situated in the Musca
RA: 12:25:45.4
Dec: -72:39:33
Distance from Sun: 18.9 kly
Distance from GalacticCenter: 23.2 kly
Apparent Diameter: 18.6 arc min
Brightness: 7.24 mag vis
:
Discovered by James Dunlop on April 30, 1826.
Globular cluster NGC 4372 was discovered by James Dunlop on April 30, 1826, and cataloged as Dunlop 67.
NGC 4372, a southern globular cluster of very low metallicity and very low central concentration, was chosen for a CCD photometric search for short-period binaries and SX Phe variables. We report the discovery of 19 variable stars with well-determined light curves and periods. Eight of these belong to the SX Phe class, and eight are contact binaries. All the SX Phe variables are concentrated towards the centre of the cluster and are blue stragglers, while contact binaries occupy various locations in the cluster colour-magnitude diagram. Half of the SX Phe stars pulsate in the fundamental mode, and the other half probably pulsate in the first overtone. An eclipsing variable that is either a short-period detached main-sequence binary or a cataclysmic binary is discovered
Camera: Canon 350d modified
Exposure Capture: DLSR Focus
Scope: SV80ED
Mount: EQ6 Pro
Exposure Setting: Prime focus, ISO800 ICNR off Daylight WB
Exposures: 20 x 90s 13/03/09
Seeing: Average although 90% Gibbous moon
Guiding: Orion Starshoot Autoguider using PHD, although my alignment was out
Focus: DSLR Focus
Stacking: DSS, 10 darks, 5 flats applied
Processing: PS7
Info: Situated in the Musca
RA: 12:25:45.4
Dec: -72:39:33
Distance from Sun: 18.9 kly
Distance from GalacticCenter: 23.2 kly
Apparent Diameter: 18.6 arc min
Brightness: 7.24 mag vis
:
Discovered by James Dunlop on April 30, 1826.
Globular cluster NGC 4372 was discovered by James Dunlop on April 30, 1826, and cataloged as Dunlop 67.
NGC 4372, a southern globular cluster of very low metallicity and very low central concentration, was chosen for a CCD photometric search for short-period binaries and SX Phe variables. We report the discovery of 19 variable stars with well-determined light curves and periods. Eight of these belong to the SX Phe class, and eight are contact binaries. All the SX Phe variables are concentrated towards the centre of the cluster and are blue stragglers, while contact binaries occupy various locations in the cluster colour-magnitude diagram. Half of the SX Phe stars pulsate in the fundamental mode, and the other half probably pulsate in the first overtone. An eclipsing variable that is either a short-period detached main-sequence binary or a cataclysmic binary is discovered