Instructions from the PI
Dear NOT observer and staff.
This is a set of instructions for NOT monitoring programme P68-509
(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
------------
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/68-509
For these observations use the appropriate script for the date, complie the
OB if needed.
Observations
| Date | Time (UT) | Duration | Comments |
| 29-03 | (EAT-15m)-21:25 | 00:20 | epoch18 SDSSJ0542-2125 |
| 31-03 | (EAT-15m)-01:35 | 00:20 | epoch20 SDSSJ0909+4449 |
| 31-03 | (EAT-15m)-01:35 | 00:35 | epoch15 SDSSJ1153+0755 |
| 31-03 | 21:00-01:35 | 00:13 | epoch16 SDSSJ1326+4806 |
| 06-04 | (EAT-15m)-02:15 | 00:20 | SDSS J0909+4449 epoch1 |
| 06-04 | (EAT-15m)-03:15 | 00:35 | SDSS J1153+0755 epoch1 |
| 06-04 | (EAT-15m)-(SAT+15m) | 00:13 | SDSS J1326+4806 epoch1 |
| 11-04 | 23:10-03:30 | 00:35 | SDSS J1153+0755 epoch2 |
| 11-04 | 23:10-01:50 | 00:20 | SDSS J0909+4449 epoch2 |
| 14-04 | 02:00-(SAT+15m) | 00:13 | SDSS J1326+4806 epoch2 |
| 19-04 | 04:55-(SAT+15m) | 00:20 | SDSS J2222+2745 epoch1 |
| 26-04 | (EAT-15m)-22:30 | 00:20 | SDSS J0909+4449 epoch3 |
| 28-04 | (EAT-15m)-00:30 | 00:35 | SDSS J1153+0755 epoch3 |
| 28-04 | (EAT-15m)-00:30 | 00:13 | SDSS J1326+4806 epoch3 |
| 02-05 | (EAT-15m)-00:15 | 00:20 | epoch4 SDSSJ0909+4449 |
| 02-05 | (EAT-15m)-02:00 | 00:35 | epoch4 SDSSJ1153+0755 |
| 04-05 | (EAT-15m)-04:45 | 00:13 | epoch4 SDSSJ1326+4806 |
| 09-05 | (EAT-15m)-00:10 | 00:20 | epoch5 SDSSJ0909+4449 |
| 09-05 | (EAT-15m)-01:30 | 00:35 | epoch5 SDSSJ1153+0755 |
| 13-05 | 01:20-04:15 | 00:13 | epoch5 SDSSJ1326+4806 |
| 13-05 | 03:30-(SAT+15m) | 00:20 | epoch2 SDSSJ2222+2745 |
| 25-05 | (EAT-15m)-22:25 | 00:20 | epoch6 SDSSJ0909+4449 |
| 27-05 | (EAT-15m)-00:10 | 00:13 | epoch6 SDSSJ1326+4806 |
| 28-05 | (EAT-15m)-00:10 | 00:35 | epoch6 SDSSJ1153+0755 |
| Program Tracking |
| Proposal |
68-509 |
| Semester |
P69: 20240401 - 20241001 |
| Principal Investigator |
Hakon Dahle |
| Programme |
Cluster-lensed quasars as probes of H0 |
| Instrument |
ALFOSC |
| Time Allocation |
8x20m J0909, 15x13m J1326, 10x13m CJ0219, 6x20m CJ0335, 3x20m CJ0542, 9x35m CJ1153, 6x20m J2222 |
| Total Nights |
18.3h |
| Type |
Mon |
| Notes |
Fixed dates to be scheduled |
| Total Time Spent |
02:07 (hh:mm)
|
| Proposal |
Date |
Time |
Type |
Targets |
Files |
Comments |
Status |
|
| 68-509 |
2024-04-06 |
00:45 |
Mon |
SDSSJ0909, SDSSJ1326, COOLJ1153 |
ALHd060175 - ALHd060177, ALHd060186, ALHd060206 - ALHd060208 |
SDSSJ0909 and SDSSJ1326 were observed with the given requirements. COOLJ1153 was also tried when the seeing looked good enough. After the first exposure, however, the seeing appeared to be ~1.5''. The script was stopped (the first exposure file can be checked) and no other time windows for the seeing requirement came later on to attempts the target again. |
Observed |
|
| 68-509 |
2024-04-11 |
00:00 |
Mon |
|
|
Unable to observe any targets due to seeing conditions beyond defined constraints. |
Failed |
|
| 68-509 |
2024-04-14 |
00:11 |
Mon |
SDSSJ1326 |
ALHd140090 - ALHd140092 |
The target SDSSJ1326 was observed when seeing was ~1.9'' after the Moon had gotten below horizon. |
Observed |
|
| 68-509 |
2024-04-19 |
00:00 |
Mon |
|
|
Seeing worse than 1.3 and clashing with a hard ToO |
Failed |
|
| 68-509 |
2024-04-26 |
00:18 |
Mon |
SDSSJ0909 |
ALHd260263 - ALHd260265 |
Observed in clear skies with seeing around 0.8" |
Observed |
|
| 68-509 |
2024-04-28 |
00:00 |
Mon |
|
|
Failed because telescope could not be opened due to high
humidity and subzero temperatures. |
Failed |
|
| 68-509 |
2024-05-02 |
00:53 |
Mon |
SDSSJ0909, COOLJ1153 |
ALHe020152 - ALHe020154, ALHe020176 - ALHe020178 |
Observed in clear skies with seeing around 0.8" |
Observed |
|
The above information is collected from the ToO/Mon reports that have been created by the observer.
Should any of the observations have been carried out using the OB system, you will find additional information
HERE
|
