SED bulge under 2000Å

[ZhihaoChen5]

Hi all, I ran Mosfit on some SLSN-I objects using dynesty sampler and my version of Mosfit is 1.1.7. I output the SEDs with command '-x seds sample_wavelengths band_indices'. The SEDs do have a suppression under 3000Å but an unusual bump appears under 2000Å which shouldn't happen on SLSN-I especially early time. It seems the higher the temperature is, the more prominent the bulge is. I thought Mosfit was using linear suppression on SEDs under wavelength_cutoff, but such bulges cannot be explained. Does anyone know which kind of suppression function Mosfit is using?

The blue points are nearby input data, and the grey lines are the SED outputs.

[mnicholl]

Hi, I am not able to reproduce this issue. I ran the default SLSN model with typical parameters:

mosfit -m slsn -F mejecta 5 vejecta 8000 Pspin 2.5 Bfield 1 texplosion 0 nhhost 1e18 --band-list UVW2 UVM2 UVW1 u g r i z --band-systems AB -x seds sample_wavelengths all_bands

Using the all_bands output to determine the order in which the SEDs are printed, and plotting these versus the sample wavelengths yields the following plot, where the SED looks correct. Maybe there is a problem with the plotting rather than the outputs? Otherwise we may need more detail to diagnose this problem.

[ZhihaoChen5]

Hi, thanks for replying me.

I can reproduce the similar figure in your email. Like this, for different samplers at phase=50.0,

But I also notice some wired figures at other epoches where wavelength_cutoff is not 3000A but around 6000A, like this, at phase=52.10

It seems my code still have some issues when plotting the sed.

May I take a look at your code to plot this figure?

Thank you! Zhihao