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 |
2025-10-14 |
00:19 |
Monitoring |
SDSSJ2222 |
ALIj140076 - ALIj140078 |
Clear skies, and the seeing was around 1.0". |
Observed |
|
| 72-510 |
2025-10-15 |
00:00 |
Monitoring |
|
|
Could not be observed due to bad weather. |
Failed |
|
| 72-510 |
2025-10-18 |
00:19 |
Monitoring |
COOLJ0542-2125 |
ALIj180169 - ALIj180171 |
observed through thin clouds and approx. 0.8 arcsec. seeing. |
Observed |
|
| 72-510 |
2025-10-19 |
00:00 |
Monitoring |
None |
None |
All targets missed due to weather. |
Failed |
|
| 72-510 |
2025-10-25 |
00:22 |
Monitoring |
COOLJ0542-2125 |
ALIj250068 - ALIj250070 |
Observed under partial light cloud cover and seeing 1.1". |
Observed |
|
| 72-510 |
2025-10-28 |
00:00 |
Monitoring |
|
|
Could not observe any targets due to 100% humidity |
Failed |
|
| 72-510 |
2025-10-29 |
00:50 |
Monitoring |
SDSSJ0909 |
ALIj290104 - ALIj290106 |
Observed with good conditions and dark, clear skies. |
Observed |
|
| 72-510 |
2025-10-30 |
00:34 |
Monitoring |
SDSSJ1004 |
ALIj300129 - ALIj300131 |
Good seeing and clear sky |
Observed |
|
| 72-510 |
2025-11-13 |
00:00 |
Monitoring |
|
|
100% humidity |
Failed |
|
| 72-510 |
2025-11-16 |
01:04 |
Monitoring |
COOLJ0542-2125, COOLJ1153, SDSSJ1326 |
ALIk160150 - ALIk160152 , ALIk160210 - ALIk160215 |
COOLJ1153 failed to meet 1.3" seeing requirements; marked as failed. Difficulty getting guide star for 1326, so had to restart OB (time not included). |
Observed |
|
| 72-510 |
2025-11-17 |
00:34 |
Monitoring |
SDSSJ1004 |
ALIk170169 - ALIk170171 |
Observed under clear sky and seeing around 1". |
Observed |
|
| 72-510 |
2025-11-18 |
00:49 |
Monitoring |
SDSSJ0909 |
0909_gband_167_deep |
Observed under clear sky and good seeing. |
Observed |
|
| 72-510 |
2025-11-19 |
00:00 |
Monitoring |
|
|
Missed due to humidity and icy conditions |
Failed |
|
| 72-510 |
2025-11-23 |
00:19 |
Monitoring |
COOLJ0542-2125 |
ALIk230134 - ALIk230136 |
Clear skies, and the seeing was around 1.3". |
Observed |
|
| 72-510 |
2025-11-24 |
00:00 |
Monitoring |
|
|
Could not be observed due to bad weather. |
Failed |
|
| 72-510 |
2025-11-25 |
00:48 |
Monitoring |
SDSSJ0909 |
ALIk250124 - ALIk250126 |
Good conditions |
Observed |
|
| 72-510 |
2025-11-26 |
00:00 |
Monitoring |
|
|
Couldn't be observed due to bad weather. |
Failed |
|
| 72-510 |
2025-11-27 |
00:00 |
Monitoring |
- |
- |
Missed due to high seeing during the night. |
Failed |
|
| 72-510 |
2025-12-12 |
00:00 |
Monitoring |
none |
none |
Ice and storm. No opening. |
Failed |
|
| 72-510 |
2025-12-13 |
00:00 |
Monitoring |
none |
none |
Bad weather. No opening. |
Failed |
|
| 72-510 |
2025-12-14 |
00:00 |
Monitoring |
|
|
No targets observed as the telescope was closed all night due to bad weather. |
Failed |
|
| 72-510 |
2025-12-15 |
00:11 |
Monitoring |
ALIl150018 - ALIl150020 |
SDSSJ1326 |
Observed one target with clear skies and seeing of 2-3". Missed the other due to weather. |
Observed |
|
| 72-510 |
2025-12-16 |
00:34 |
Monitoring |
SDSSJ1004 |
ALIl160236 - ALIl160238 |
Observed with clear skies and seeing around 1.5". |
Observed |
|
| 72-510 |
2025-12-17 |
00:35 |
Monitoring |
COOLJ1153 |
ALIl170469 - ALIl170471 |
Observed during high clouds and seeing <1.3". |
Observed |
|
| 72-510 |
2025-12-18 |
00:19 |
Monitoring |
COOLJ0335-1927 |
ALIl180141 - ALIl180143 |
Observed during thin clouds and seeing below 1.3". |
Observed |
|
| 72-510 |
2025-12-20 |
00:19 |
Monitoring |
COOLJ0542-2125 |
ALIl200161 - ALIl200163 |
Observed at high airmass and variable seeing |
Observed |
|
| 72-510 |
2025-12-21 |
00:34 |
Monitoring |
COOLJ1153 |
ALIl210229 - ALIl210231 |
Observed in high humidity and some thin clouds |
Observed |
|
| 72-510 |
2025-12-25 |
00:18 |
Monitoring |
COOLJ0542-2125 |
ALIl250154 - ALIl250156 |
Clear skies, and the seeing was around 1.0". |
Observed |
|
| 72-510 |
2025-12-26 |
00:49 |
Monitoring |
SDSSJ0909 |
ALIl260434 - ALIl260436 |
Clear skies, and the seeing was around 1.0". |
Observed |
|
| 72-510 |
2025-12-27 |
00:33 |
Monitoring |
SDSSJ1004 |
ALIl270213 - ALIl270215 |
Clear skies, and the seeing was around 1.1". |
Observed |
|
| 72-510 |
2025-12-28 |
00:34 |
Monitoring |
COOLJ1153 |
ALIl280180 - ALIl280182 |
Clear skies and great seeing |
Observed |
|
| 72-510 |
2025-12-30 |
00:10 |
Monitoring |
SDSSJ1326 |
ALIl300195 - ALIl300197 |
Observed through clear skies and approx. 1 arcsec. seeing. |
Observed |
|
Should any of the observations have been carried out using the OB system, you will find additional information
HERE
