This is a set of instructions for NOT monitoring programme P70-502
(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.
For the "monitoring" observations use
the script indicated by the OB.
For these observations use the appropriate script for the date, complie the
OB if needed.
| Proposal |
Date |
Time |
Type |
Targets |
Files |
Comments |
Status |
|
| 72-510 |
2026-04-04 |
00:00 |
Monitoring |
None |
None |
Night lost due to humidity |
Failed |
|
| 72-510 |
2026-04-05 |
00:00 |
Monitoring |
|
|
Not observed due to high levels of humidity. |
Failed |
|
| 72-510 |
2026-04-07 |
00:24 |
Monitoring |
SDSSJ1004 |
ALJd070130 - ALJd070131 |
The script was aborted after a two exposures since the seeing was well above the set limit |
Failed |
|
| 72-510 |
2026-04-12 |
00:49 |
Monitoring |
SDSSJ0909 |
ALJd120074 - ALJd120076 |
OK |
Observed |
|
| 72-510 |
2026-04-13 |
00:33 |
Monitoring |
COOLJ1153 |
ALJd130184 - ALJd130186 |
Dark night OK seeing |
Observed |
|
| 72-510 |
2026-04-14 |
00:45 |
Monitoring |
COOLJ1153, SDSSJ1326 |
ALJd140117 - ALJd140119, ALJd140145 - ALJd140147 |
Observed targets with seeing between 3-4". |
Observed |
|
| 72-510 |
2026-04-15 |
00:48 |
Monitoring |
SDSSJ0909 |
ALJd150104 - ALJd150106 |
Observed with clear skies and seeing 1.3''. |
Observed |
|
| 72-510 |
2026-04-16 |
00:00 |
Monitoring |
|
|
Software problem during obs and seeing more than 1.5", when problem was resolved. |
Failed |
|
| 72-510 |
2026-04-20 |
00:33 |
Monitoring |
COOLJ1153 |
ALJd200159 - ALJd200161 |
Observed with clear sky and seeing about 0.9'' |
Observed |
|
| 72-510 |
2026-04-23 |
00:30 |
Monitoring |
SDSSJ1326, SDSSJ2222 |
ALJd230136 - ALJd230141 |
Observed under clear skies and sub-arcsec seeing. |
Observed |
|
| 72-510 |
2026-05-03 |
00:11 |
Monitoring |
ALJe030093 - ALJe030095 |
SDSSJ1326 |
No sky flats, seeing 1.0" |
Observed |
|
| 72-510 |
2026-05-05 |
01:21 |
Monitoring |
SDSSJ0909, SDSSJ1004 |
ALJe050072 - ALJe050079 |
Observed with clear skies and good seeing. |
Observed |
|
| 72-510 |
2026-05-09 |
00:00 |
Monitoring |
|
|
Observations were missed due to ToOs |
Failed |
|
| 72-510 |
2026-05-11 |
00:33 |
Monitoring |
SDSSJ1004 |
ALJe110077 - ALJe110079 |
Good seeing and clear skies |
Observed |
|
| 72-510 |
2026-05-12 |
00:33 |
Monitoring |
COOLJ1153 |
ALJe120092 - ALJe120094 |
Clear skies and good seeing |
Observed |
|
| 72-510 |
2026-05-14 |
00:00 |
Monitoring |
|
|
Lost due to weather. |
Failed |
|
| 72-510 |
2026-05-15 |
00:48 |
Monitoring |
SDSSJ0909 |
ALJe150076 - ALJe150078 |
Observed under clear skies. Seeing varied throughout the observation, around 1.26" at the start of the observation and around 1.7" at the end. |
Observed |
|
| 72-510 |
2026-05-16 |
00:47 |
Monitoring |
SDSSJ1004, COOLJ1153 |
ALJe160081 - ALJe160083, ALJe160090 - ALJe160092 |
Observed under clear skies with varying seeing between 1.0"-1.9". |
Observed |
|
| 72-510 |
2026-05-24 |
00:11 |
Monitoring |
SDSSJ1326 |
ALJe240125 - ALJe240127 |
Observed under clear skies and seeing 1.5"-1.6". |
Observed |
|
| 72-510 |
2026-05-25 |
00:00 |
Monitoring |
|
|
Missed due to high clouds. |
Failed |
|
| 72-510 |
2026-06-03 |
00:46 |
Monitoring |
SDSSJ1326, SDSSJ1004 |
ALJf030095 - ALJf030097, ALJf030098 - ALJf030100 |
Observed under clear skies and seeing less than 1.7". |
Observed |
|
| 72-510 |
2026-06-05 |
00:00 |
Monitoring |
|
|
Telescope had to close due to bad weather. No targets observed. |
Failed |
|
| 72-510 |
2026-06-09 |
00:11 |
Monitoring |
SDSSJ1326 |
ALJf090193 - ALJf090195 |
clear skies and seeing around 1.2" |
Observed |
|
| 72-510 |
2026-06-10 |
00:00 |
Monitoring |
COOLJ1153 |
ALJf100276 - ALJf100276 |
Attempted, but seeing limit not met due to high airmass. |
Failed |
|
| 72-510 |
2026-06-16 |
00:34 |
Monitoring |
COOLJ1153 |
ALJf160073 - ALJf160075 |
Observed with clear skies |
Observed |
|
| 72-510 |
2026-06-17 |
00:11 |
Monitoring |
SDSSJ1326 |
ALJf170076 - ALJf170078 |
Observed with clear skies and seeing <1 |
Observed |
|
| 72-510 |
2026-06-19 |
00:19 |
Monitoring |
SDSSJ2222 |
ALJf190205 - ALJf190207 |
Observed with clear sky and seeing about 0.7'' - 0.9'' |
Observed |
|
Should any of the observations have been carried out using the OB system, you will find additional information
HERE
