V886 Her

Reference list 

Comparison stars: (H=Hipparcos T=Tycho) 

Finding chart: V886 Her 
 

IMAGE AND DATA PROCESSING DONE:

- zero, dark, flat processing 

- IRAF daophot psf photometry 

- catalogue match, (wcs obtained from GSC and matched with Hipparcos, Tycho for star names and magnitudes) 

- determined first order extinction on comparison stars with least squares 

- applied differential extinction and calculated standard (Tycho) magnitudes 
 

Observation date

Number of images

Filters

Extinction

coefficients

Extinction corrected

inst. magnitudes

Extinction corrected

light curve

Color corrected

light curve

Remarks

2000-05-14

358

VRI

Kv=0.186 

Kr=0.159

Ki=0.119

V

R

I

VRI

VRI with errorbar

good transparency, good seeing 
calm

2000-06-01

143

B

Kb=0.251

Asci files:

V886Her B

all stars B

B

B with errorbar

all stars

Good seeing

B

120 s

V

90 s

R

60 s

I

60 s