08jun00: j1743-038 seems anomalous-- the other sources don't show a large offset. 1743 is 95 deg from the moon. However the primary calibrator, 1230+123, is 19 deg from the moon. And we did do a primecal calibration.

08jun00: j1743-038 seems anomalous-- the other sources don't show a large offset. 1743 is 95 deg from the moon. However the primary calibrator, 1230+123, is 19 deg from the moon. And we did do a primecal calibration. I reran the calibration and left out pcorr, and the offset looks like a real offset; the residuals look random. J1230+123 is another story: the residuals are highly patterned and the noise level twice theoretical.

31jul00: 12h sources at 45 deg from moon. primary calibrator has large fitted offset too-- huh?

31jul00: 12h sources at 45 deg from moon. primary calibrator has large fitted offset too-- huh? Oh, actually we used jupiter as the primary calibrator. It looks to me like there was an attenuator change between jupiter and the data, why this got written out I have no idea!! Ok, it seems that I only see the second atten change in the morning (01aug) in my current run of cbical, and it is correlated with an I/O error--corrupt file 20000801_084409.dat. maybe bogus. When I take out checkAtten, the residuals on the problem child 1549 look fine. (though other sources this day also show crappy offsetts)

29jul00: primary calibrator has large fitted offset-- huh?

29jul00: primary calibrator has large fitted offset-- huh? Used jupiter here too.

12jun00: primary calibrator 37 degrees from the moon. primecal is j1230+123.

20jun00: primecal is j1230+123, it is 131 deg from the moon. residual map for this guy is also highly patterned and noise is twice theoretical. actual noise is 54 mJy RMS; on a 16 Jy source this represents a dynamic range of about 900. Qualitatively the residuals are quite similar to those on 08jun.

The Best of Times:

163 j2253+161 8.74 0.021 13.8 6.6 j1230+123 15.2971    12jun
171 j2253+161 8.82 0.032 10.9 10.8 j1230+123 15.3444   20jun
178 j1337-129 10.31 0.042 15.3 1.3 j1230+123 15.3551   27jun
172 j1743-038 5.15 0.019 5.2 14.5 j1230+123 15.4042    21jun
176 j1743-038 5.47 0.025 15.1 -3.1 j1230+123 15.4149   25jun
158 j1549+026 1.70 0.019 -1.9 -15.3 j1230+123 15.4175  07jun
196 j1229+020 16.45 0.030 13.6 -7.9 j1230+123 15.728   15jul
175 j1549+026 1.81 0.018 11.0 11.3 j1230+123 15.7699   24jun
201 j1229+020 16.44 0.034 9.4 12.7 j1230+123 15.8003   20jul

The Worst of Times:

To Do

• rerun bad and typical days without phase calibration on the phasecals (ie, referred only to the primary source)
• inspect the data
• learn something?
• define a cut for spectrum runs.

Notes on Bad Days and Sources

08jun00: j1743-038 seems anomalous-- the other sources don't show a large offset. 1743 is 95 deg from the moon. However the primary calibrator, 1230+123, is 19 deg from the moon. And we did do a primecal calibration.

31jul00: 12h sources at 45 deg from moon. primary calibrator has large fitted offset too-- huh?

29jul00: primary calibrator has large fitted offset-- huh?

Notes on Typical Days and Sources

%META:TOPICINFO{author="BrianMason" date="1185242148" format="1.0" version="1.1"}%

212 j1743-038 7.10 0.027 -37.3 25.2 j1230+123 45.0148 31jul00
212 j1229+020 18.77 0.048 -45.5 -3.0 j1230+123 45.5988 31jul00
210 j1229+020 19.67 0.062 -31.2 -37.5 j1230+123 48.7821 29jul00
210 j1337-129 11.47 0.036 -29.1 -40.4 j1230+123 49.7893 29jul00
212 j1230+123 19.19 0.052 -50.8 -6.7 j1230+123 51.2399 31jul00 
197 j1337-129 10.22 0.030 44.9 -27.6 j1230+123 52.7046 16jul00
206 j1229+020 15.65 0.218 11.6 -53.7 j1230+123 54.9386 25jul00
210 j1230+123 19.78 0.063 -35.3 -45.1 j1230+123 57.2722 29jul00
206 j1743-038 5.93 0.030 -18.5 56.6 j1230+123 59.5467 25jul00
205 j1743-038 6.07 0.019 -18.1 57.8 j1230+123 60.5677 24jul00
212 j1549+026 2.13 0.020 -58.1 18.7 j1230+123 61.0352 31jul00
159 j1743-038 5.38 0.022 -6.3 -92.9 j1230+123 93.1134 08jun00

-- BrianMason - 24 Jul 2007