Convolving new filters

[sagastar128]

Hey,

I’m trying to convolve some more filters without much success at least in case of WISE/ALLWISE. For IPHAS data I just pulled the throughput of the filters from
http://catserver.ing.iac.es/filter/list.php?instrument=WFC&filtersystem=BroadAndNarrowBand&availability=Yes
This appeared to have worked fine, assuming the idea of using them was correct. For WISE I only found the relative spectral response according to section v. of:
http://wise2.ipac.caltech.edu/docs/release/prelim/expsup/sec4_3g.html

If I plug them into
f = Filter()
f.name = ...
f.central_wavelength = ...
f.nu = ...
f.response = ...

The result of the convolution is a fits containing 0’s. I don’t know how to fix that problem so I’d appreciate a little hint or help.
Thank you
Heim

[astrofrog]

@sagastar128 - sorry for the delay in getting back to you. Are you still having this issue? If so, could you give me the actual values you used for the filter?

[sagastar128]

I think I found a rather crude workaround for my problem. I used the downloadable ASCII files of the late online fitting tool and sort of transplanted that data into the empty fits-file (I used the existing 2MASS filter/ascii file as reference for reordering).

There was no issue for the three iphas filters. There I basically used the above mentioned webpage and took the txt-file of which I defined f.nu = first column, and f.response as the second column. Still not sure if that's ok. If added the Halpha filter as an example file:
halpha.txt

[KainRasleafar]

I have the same problem with Wise and Herschel filters.
@astrofrog Yesterday I sent You an email with my way of thinking in jupyter notebook.