Nordic Optical Telescope

Program: 70-501 Sollerman ea

External Project: Extragalactic transient classifications for the Vera Rubin Observatory Community

Observing instructions:

Scripts:
~obs/scripts/70-501/

In this directory you will find the OB compiled scripts. Please execute the requested scripts.

P70 tracking
P71 tracking

Program Tracking

Proposal 70-501

Semester P72: 20251001 - 20260401

Principal Investigator Jesper Sollerman

Programme External Project: Extragalactic transient classifications for the Vera Rubin Observatory Community

Instrument AL+NC+FI

Time Allocation Roughly 35h hard ToO, 35h SoftToO, Vera Rubin project

Total Nights 7

Type ToO+SoftToO

Notes Override. Soft triggers during Nordic service or Technical nights

Total Time Spent 25:51 (hh:mm)

Proposal Date Time Type Targets Files Comments Status

70-501 2025-10-07 00:37 SoftToO ZTF24abzxalv ALIj070069 - ALIj070075 Observed with clear skies and seeing of about 1.2'' Observed

70-501 2025-10-10 00:59 SoftToO ZTF25abuojsb ALIj100132 - ALIj100137, ALIj100141 Observed with clear sky and seeing about 0.6''. We experienced an error with the last exposure for the Halogen flat, so we took it manually. See file: ALIj100141 Observed

70-501 2025-10-12 00:38 SoftToO ZTF25abqiaaj ALIj120058 - ALIj120064 Observed through thin clouds with seeing around 1.0". Observed

70-501 2025-10-13 00:37 SoftToO ZTF25abmjfcf ALIj130110 - ALIj130116 Observed through thin clouds and approx. 0.6 arcsec seeing. Observed

70-501 2025-10-14 00:42 SoftToO ZTF25abuvvga ALIj140098 - ALIj140104 The seeing was around 1.2". Thick clouds appeared in between observations, obscuring the target and leading to several cancelled attempts. The data may not be useful. Failed

70-501 2025-10-29 01:07 SoftToO ZTF25abwloaq ALIj290107 - ALIj290113 Observed with good conditions, clear and dark skies. couple of unfortunate cosmic ray hits in the spectrum Observed

70-501 2025-11-06 01:23 SoftToO ZTF25acaebmv, ZTF24abtczty ALIk060165 - ALIk060177 Clear, grey skies and seeing around 0.8" Observed

70-501 2025-11-09 00:39 SoftToO ZTF25abzyzac ALIk090070 - ALIk090076 Observed with clear skies and seeing around 0.8". Observed

70-501 2025-11-16 02:14 SoftToO ZTF25acbyhbm, ZTF25abwcymj,
ZTF25absjioz, ZTF25abyrwhz ALIk160049 - ALIk160055 , ALIk160083 - ALIk160089 , ALIk160158 - ALIk160170 Not including time spent on abwcymj with 1.3" slit since seeing was better than expected and the OB was terminated shortly after. Observed

70-501 2025-11-17 02:39 SoftToO ZTF25acdabfa, ZTF25abwvblg, ZTF25aatmfzy ALIk170096 - ALIk170103, ALIk170116 - ALIk170122, ALIk170172 - ALIk170179 Observed under clear sky and seeing around 1". Observed

70-501 2025-11-23 00:53 SoftToO ZTF24aatytqv ALIk230084 - ALIk230092 Clear skies, and the seeing was oscillating between 2.0" and 2.5". Observed

70-501 2025-11-27 00:40 SoftToO ZTF25abzyzac ALIk270077 - ALIk270082 One target observed with clear skies in varying seeing conditions ~1.5". A technical error occurred when taking the calibration frames. Please use the halogen biases from the end of the night. Observed

70-501 2025-12-15 01:03 SoftToO ZTF25acfswkq, ZTF25acemaph ALIl150027 - ALIl150040 Observed with clear skies and seeing around 2-2.5". Observed

70-501 2025-12-16 01:36 SoftToO ZTF25accmopr, ZTF25achiqqs ALIl160239 - ALIl160245, ALIl160265 - ALIl160271 Observed with clear skies and seeing around 1.5". Observed

70-501 2025-12-17 02:07 SoftToO ZTF25abzyzac,ZTF25abxlcab, ZTF25abyrwhz ALIl170161 - ALIl170174, ALIl170358 - ALIl170364 Observed during high clouds and varying seeing. It was difficult to find guide stars due to clouds. Observed

70-501 2025-12-20 01:22 SoftToO ZTF24abdiwwv, ZTF25acepvuo, ZTF25acemaph ALIl200107 - ALIl200108 , ALIl200238 - ALIl200244 , ALIl200280 - ALIl200286 ZTF24 failed to meet seeing limits. The other two targets completed without issue. Observed

70-501 2025-12-25 00:37 SoftToO ZTF25abwvblg ALIl250139 - ALIl250145 Clear skies, and the seeing was around 1.1". Observed

70-501 2025-12-26 00:35 SoftToO ZTF24abdiwwv ALIl260176 - ALIl260181 Clear skies, and the seeing was around 1.0". Observed

70-501 2025-12-27 00:38 SoftToO ZTF25acjbjpa, ZTF25acgtieb ALIl270228 - ALIl270234 Clear skies, and the seeing was around 1.3". Observed

70-501 2025-12-28 01:07 SoftToO ZTF25acjbjpa ALIl280160 - ALIl280167 Observed after sky started to clear up. Good seeing and high, thin clouds. Target was difficult to see from slit acquisition. Observed

70-501 2025-12-31 00:19 SoftToO ZTF25acglosh ALIl310091 - ALIl310097 Observed through thin clouds in approx. 2 arcsec. seeing. Observed

70-501 2026-01-08 00:35 SoftToO ZTF25acemaph ALJa080103 - ALJa080109 One target observed in decent conditions. Observed

70-501 2026-01-09 01:34 SoftToO ZTF25acfybcc, ZTF25acjbjpa ALJa090077 - ALJa090083, ALJa090185, ALJa090189, ALJa090192 - ALJa090193 Both targets observed with clear skies. For ZTF25acjbjpa the observation was aborted between the two science exposures. The correct files are ALJa090185 and ALJa090189 and the arcs are ALJa090192 and ALJa090193 for this target. Observed

70-501 2026-01-12 01:10 SoftToO ZTF24aatytqv ALJa120090 - ALJa120098 Observed in a clear patch of a sky with high clouds and seeing about 1.0'' - 1.1'' 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

Last modified: January 09 2026