Reducing Keck data, May 00    -IMH
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using dualamp mode:

prepix=21
postpix=80

left side: [43:1066,1:2048]  but bad column so use [44:1066,1:2048]

overscan:  [2091:2170,1:2048]

rightside [1067:2090,1:2048] but bad column so use [1067:2089,1:2048]

overscan:  [2171:2250,1:2048]

arc: l013x
standard: 034

night 1 seeing 0.8-0.9"

night 2 : bias levels have changed ! CCD crate was rebooted before
start of night 3 and that brought levels back (1000 on left, 1100 on right)

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Bernstein:

runs #039, 040

 object at row 327 (pivot star at 460)
     AGN: OIII, Hb, OII z=0.599

 files: l039c.fits, bernstein.asc, bernstein.ps

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Beethoven

l041, l042
l046, l047

z~0.546 (OII line + type Ia like SN features)
files beet_1.fits, beet_2.fits (summed pairs of 20 minutes)

beet_c.fits, beethoven.asc

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Berlioz

l050, l051  > berl_1
l053, l054  > berl_2
l057, l058  > berl_3

positions of pivot stars
                shift
l050  363.157    0.0
l051  363.799   -0.642
l053  311.904   51.253
l054  312.568   50.589
l057  270.594   92.563
l058  271.024   92.133
l061
l062

flats:
l052 - different slit function from the other flats ?
l056
l059

combined 056,059 > berl_flat
normalise!
used this to flatten all the images.

sky subtract them all, rows 300-600 avoiding pivot star & object
shift them and combine.
Extract from combined image > berl_shc.asc

Night2 berlioz:

l137 364.082    0.0
l138 364.606   -0.524
l141 432.571  -68.489
l142 432.606  -68.524
l144 494.939 -130.857
l145 495.602 -131.52
l147 302.588   61.494
l148 303.125   60.957

flat: 140,143,146
fringe pattern looks pretty stable
combine flats and use this one for all

made fringe frame - not great cos pivot star in one frame overlaps object

extracted 3 objects this time > berl_n2_shc
ap1 = QSO
ap2 = pivot star
ap3 = Target

combined nights one and two > berl_n1_n2c

then did this accounting for wavelength shifts: berl_all
berl_allc.fits, berl_allc.asc
 
Maybe maybe a line at 6982A confirmed. Probably OII at z=0.873.
No clear Sn features. There may be a bump at the blue end but this
may be a flux-calibration problem. Needs more work.

N.B neighbouring object, not extracted cos no continuum, has line at 767pix 
 >> z = 0.874

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JC Bach

130,133
flat = l131

biases : 134, 135, 136

QSO at z=1.25 ???

files: bach_c.fits, bach_c.asc, bach.ps

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rey33

couldn't see anything in 2d frames

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Kabalevsky

l154

possible line in 2d image OII at z~0.9 ? (pix 952)
= 7318.7 
if OII then z=0.96

Needs more tomorrow.

night 2 data: (NB rotated by 180 deg).
use bias_n3

l246s 573.892
l247s 574.181
l249s 489.115
l250s 489.607


flats: 248

Emission line is confirmed.
No obvious SN features but spectrum is noisy.

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