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Instructions from the PI

Dear NOT observer and staff.

This is a set of instructions for NOT monitoring programme P61-506 (PI:Håkon Dahle), scheduled for service observations. The purpose is to monitor three of the five currently known gravitationally lensed quasars where the lens is a galaxy cluster. The main purpose of the observations is to use the light curves to make time delay measurements between multiple lensed quasar images in order to estimate the value of the Hubble constant. We will also determine the level of microlensing in each lens system. The target information and the observing strategy are reported below.

Please let us know whether you carried out these observations.

Thank you!

Best regards,
Håkon Dahle

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For the "monitoring" observations use the script indicated by the OB.

Calibrations:

For calibration we request:

- A set of three twilight flats for the SDSS g' filter
- alfosc-calibs


Available scripts

Go to the directory
  cd ~/scripts/61-506

For these observations use the appropriate script for the date, complie the OB if needed.


Observations

J0909+44

20 minutes per epoch

J1326+48

20 minutes per epoch

J2222+27

36 minutes per epoch


Date Time (UT) Duration Comments
03-04 22:30-02:05 00:20 epoch1 J1326
11-04 22:10-04:15 00:20 epoch2 J1326
18-04 01:25-03:50 00:20 epoch3 J1326
29-04 (EAT-15m)-22:50 00:20 epoch4 J1326
08-05 (EAT-15m)-02:30 00:20 epoch5 J1326
18-05 01:40-03:00 00:20 epoch6 J1326
28-05 (EAT-15m)-22:45 00:20 epoch7 J1326
08-06 (EAT-15m)-00:30 00:20 epoch8 J1326
16-06 00:55-02:00 00:20 epoch9 J1326
26-06 (EAT-15m)-22:20 00:20 epoch10 J1326
11-07 (EAT-15m)-23:25 00:20 epoch11 J1326
26-07 (EAT-15m)-22:15 00:20 epoch12 J1326
01-08 (EAT-15m)-23:00 00:20 epoch13 J1326
08-08 (EAT-15m)-22:00 00:20 epoch14 J1326
26-08 (EAT-15m)-21:25 00:20 epoch15 J1326

P61 tracking P62 tracking

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