Observers: Mat Smith (Southampton), Anais Möller, Melissa Amenouche (Clermont-Ferrand)
Support Team: Charlotte Angus (DARK), Miika Pursiainen (Southampton)
TAT: Priscila Pessi (CONICET), Giuliano Pignata (UNAB/MAS), Phil Wiseman (Southampton)
Afternoon Calibrations: Dome flats, Arcs, Bias frames (x3)
Weather:
Afternoon: High wispy cloud
Sunset: 8.30 (local); 23.30 UT; stunning, but through wispy cloud; no sky flats taken
Post-sunset: Seeing 1.0"; Wind: 2m/s
Middle of night: Seeing 0.8"; Wind: 3m/s + high cloud covering 50% of the sky. That + moon means no photometry tonight.
Early morning: Seeing 1.3"; Wind: 4m/s. Heavy clouds == no more follow-ups.
07:45UT: Heavy clouds mean that we close for the night. 1.5+ hours lost
Comments:
1. One potential target (AT2020bxd) is already classified as a SNIa, so was not targeted.
2. ZTF20aamamnp is aka AT2020chy, but the marshall doesn't know that.
Observations:
| UT | Target | Purpose | Grism/Filter | Conditions | Exp. time | Classification | Notes |
| 00:25 | L745a | Standard | gr11+gr13+gr16 | 1.0"; airmass 1.2 | --- | --- | ==> image analysis |
| 01:05 | SN2019pcr | Follow-up | g13 | 1.0"; airmass 1.7-2.1 | 1x45 mins | (SNII) | Object is setting; 1x2700s today, 1x2700s tomorrow :) |
| 01:55 | AT2020bdh | Classification | gr13 | 1.0"; airmass 1.9 | 1x15 mins | Unclassified | Discovered by ZTF prior to ATLAS. Object is visible in acq. Spectrum is low S/N |
| 02:15 | AT2019qiz | Follow-up | gr11 | 0.9"; airmass 1.4 | 2x30mins | (TDE) | Pointed at galaxy centre |
| 03:20 | AT2019xis | Follow-up | gr13 | 0.8"; airmass 1.5 | 2x30mins | (Light-echo) | Object is visible in acq. Due to rising moon and high clouds, imaging is left for another night |
| 04:30 | AT2020chy (ZTF20aamamnp) | Classification | gr13 | 1.0"; airmass 1.2 | 1x15 mins | SNII @ z=0.054; pre-max | Discovered by ZTF |
| 04:55 | SN2019ahk | Follow-up | gr11 | 1.0"; airmass 1.5 | 1x45 mins | (TDE) | No evidence of transient 'rebrightening' is visible in 1D extraction |
| 05:55 | SN2019tsf | Follow-up | gr13 | 1.1"; airmass 1.1 | 1x30 mins | (SNIb) | |
| 06:30 | SN2019aze | Follow-up | gr13 | 0.8"; airmass 1.05 | 1x25 mins | (SNII) | |
| 07:05 | AT2020bka | Classification | gr13 | heavy clouds | --- | --- | High clouds mean that the field is not distinguishable: skipped |
| 07:20 | AT2020cbo | Classification | gr13 | 1.3"; airmass 1.15 | 1x400s | SNIa @ z=0.04; -5 days | ATLAS discovery. |
| 07:30 | AT2020bft | Classification | gr13 | 1.2"; airmass 1.2 | 1x400s | SNIIb @ z=0.04; pre-max | ATLAS discovery. |
| 07:50 | --- | --- | --- | --- | --- | --- | Closed due to high clouds |
