• Adam M, Ana S-C, Ariel G, Bastien C, Benjamin R, Dominique R, Estelle R, Fabrice F, Georgios D, Jacco T, Jakob N, Joel J, Julian B, Luke H, Mark M, Martin B, Mat S, Mattia B, Maxime D, Melissa A, Mickael R, Nicolas R, Philippe R, Ryan L, Suhail D, Valery B, Young-Lo K

• ~20 typed Ia's this week: that's a slow week
• ZTF21abhqirx. Semi nuclear.
• ZTF21abhtafw. Also semi nuclear.
• ZTF21abgxudc: Also nuclear also young!
• ZTF21abedvkp: Overluminous, but observationally faint.

• Two ToO opportunities.
  • The first is on swift: trying to get things early, especially things that are weird. The plan here to get things very early, with plenty of scope for CC contamination. Anything <180Mpc. Young<-16.
  • Gemini program: NIR spectroscopy. 3 epochs for things which look like DD. Looking for very red objects / early bump. Anything <200Mpc.
  • Not included: "hpx" (the bump / excess candidate): although more data will be collected on this!
• Also on the call: Ryan Lebron. UG working with Adam on swift data.

• Three planned proposals: RCF (led by Mat); Ia's at peak (led by Joel); lensed candidates (Suhail)
• The call is delayed, so the deadline will likely be delayed.
• Joel hasn't started; Mat has a draft; Suhail has a polished draft.
• The lensers are requesting 3.5hours for confirmation photometry and spectroscopy of faint targets.
  • Can we get a host spec_z for faint objects? Would this be better than photometry? Mickael: this is doable with SEDm.
  • Suhail: let's see if we can add it to the proposal.
• The Ia team (mostly Dublin+Adam+Joel) will pull together a candidate list to estimate how much time is required.
  • Adam, this can be done through AMPEL / Fritz, but someone needs to spearhead it.

• Organising a SNIa sample is like an experiment: write down the steps/units.
• The analysis is then reproducible and distributable.
  • Things like matching to BTS could break reproducibility.
• Matches to spec_z's and phot-z's and fits light-curves to SNCosmo
  • Cuts are then made, and distances are estimated... Has lots of parameters: sigma outlier cut (4 by default), min S/N considered, etc.
  • All units are python classes; the entire thing is in a python notebook
  • The entire thing exists, can be downloaded and run. The HD looks good; scattered, but that's mostly due to redshift uncertainties.
  • The only missing thing is a T3 unit that fits alpha & beta. Valery is working on this. Unity is included.
  • For a full cosmology we need:
    • Host matching (Mat)
    • Forced-photometry
    • Photometry updates
    • Pec vel correction
    • Bias corrections
• Let's collect together a list of ideas / requirements

• Probably we will break for the summer in a couple of weeks.

ZTF Ia Phone-con: 2021-Jun-23

Meeting Agenda:

1. SNe of the week [Joel J]

2. Gemini proposal status [Adam M]

3. Proposals in progress: P60 [Mat S & Suhail D]

2. AMPEL: Generating a cosmological sample [Jakob N]

3. AOB / Close

-

Participants (XX):

• Mat S

Notes:

Transients of the Week:

The Gemini Proposal:

P60 / SEDm proposals:

AMPEL: SNeIa:

Closing Remarks: