• Mat S, Joel J, Mickael R, Ariel G, Jakob N, Martin B, Ana S, Bastien C, Benjamin R, Jacco T, Julian B, Kate M, Manu G, Mattia B, Maxime D, Melissa A, Suhail D, Valery B, Philippe R

• ZTF21aamokak (SN2021dov): z=0.012
  • Caught early; limited Si; Carbon?
  • Twin of iPTF16abc; reddenned version?
  • Very fast rise

Maxime on: SuperCh SNeIa:

• ZTF18abhpgje (z=0.13):Has early flux excess! SC SNe Ia with interaction?
  • Is it real? The bump is seen on only one epoch. Can we get ZUDS?
  • Similar to LSQ12gpw. Shows Carbon
  • More than 40 potential SC SNe in the data. Are there more with bumps?!
  • Talk to Georgios when he joins! (note to everyone else: Mat knows Georgios!)

• Proposal is being pulled together. 4 objects planned. Shout if you want to be involved
• SN2021J, SN2020nlb, SN2019np, SN2020hvf. Maybe SN2020ftl at higher-z.
• Will be circulated in a day or so.
• Spitzer data is available.
• A discussion with the Chicago group is planned for next week.

Ana on Simulating Lensing:

• We're looking for lensed SNe, but we don't find very many :).
• Using simsurvey to look at detection rate.
  • Developed in ZTF. Useful for estimating rates.
  • Combines a survey plan + transient model => outputs light-curve.
• Simulating over 2 months of ZTF.
  • Low magnified objects are more common, but cannot be seen beyond z=0.5; highly magnified objects can be seen to z=2.0
  • Moving to a new model, which goes beyond a simple "brighten a SNIa"
• Improving the candidate vetting procedure:
  • SNe are likely to be merged with their host. Need to disentagle them. Use a colour selection.
  • PTF16geu is weird in colour-colour space relative to regular galaxy lenses.
  • Moving to ML for detection
    • Using the NN emulator of Justin+ 2020 (SPECulator) - like prospector but faster!
  • Need galaxy info quickly for the search. Need to look in colour-colour space to rule out AGN.
  • Immediate light-curve fit compared to phot-z is also critical.
    • Legacy Survey can give you photo-z's from WISE+DECAM.
    • ZTF-target should be useful.
    • Much of this information is in AMPEL
    • Have MUSE time by the end of March. Would be great to use it!

• Read Rahul's paper! Comments by the end of the week.
• Back next week :).

ZTF Ia Phone-con: 2021-Feb-24

Meeting Agenda:

1. SNe of the week [Joel J]

2. The physics of SNe Ia: "SuperCh SNe" [Maxime D]

3. Future plans: "An update on HST'ing TRGB" [Suhail D] + "DEBASS'ing ZTF" [Mat S]

5. Real time updates: "The search for lensed SNe" [Ana S-C]

6. AOB / Close

Participants ():

Notes:

Transients of the Week:

Maxime on: SuperCh SNeIa

Suhail on HST:

Mat on DEBASS:

Ana on Simulations and Lensing:

Closing Remarks: