Yoonsoo P. Bach

Implement "downsampling"

1

I've just encountered ~10 4K images to combine. I am using Macbook Pro 15" (MBP 15" [2018, macOS 11.4, i7-8850H (2.6 GHz; 6-core), RAM 16 GB (2400MHz DDR4), Radeon Pro...

MAST query_criteria not working for some column criteria?

4

I was following the [documentation](https://astroquery.readthedocs.io/en/latest/mast/mast.html#id1). Examples such as this ```python catalog_data = Catalogs.query_criteria(catalog="Ctl", objectname='M101', radius=1, Tmag=[10.75,11]) catalog_data ``` works as expected (only Tmag between 10.75 to 11 are selected). However,...

Variance as error for aperture photometry

1

Currently, [``_prepare_photometry_data``](https://github.com/astropy/photutils/blob/master/photutils/aperture/_photometry_utils.py#L66) or [``do_photometry``](https://github.com/astropy/photutils/blob/master/photutils/aperture/core.py#L315) takes error as standard deviation, while they convert the error to the variance map. This, however, can be simplified by accepting the user to provide variance...

Separate sky estimation for each stars in IterativelySubtractedPSFPhotometry

1

Currently the PSF photometry in photutils accepts the sky estimator as `bkg_estimator`. But in PSF photometry process, as far as I understand, we have to subtract the sky from regional...

Making custom apertures by combining existing Apertures

2

It's rather a question... I wanted to make a pillbox-shaped aperture, as in TRIPPY (e.g., [here](https://nbviewer.jupyter.org/github/fraserw/trippy/blob/master/tutorial/trippytutorial.ipynb)), because all the stars in my images are trailed (due to the non-sidereal tracking...

constraints function gives AttributeError if targets is in ndarray

2

For some reason, I have `targets` in ``np.ndarray``. (I have to mask some targets frequently by comparing them (`SkyCoord` objects) with a catalog table) The following code shows the problem:...

Image Combine with wcs offset

4

For simple and primitive image analysis for non-sidereal tracking data, it is quite common to use script like ``` imcombine @fits.list output=combined.fits combine="median" offset="wcs" ``` in IRAF (`fits.list` is the...

Adding LTM, LTV parameters to trim_image

1

Often I have to crop images, but the ``Physical`` coordinate, which is understood by SAO ds9, is missing when I use ``ccdproc``. I have my personal codes, which include image...

ipyparallel dependency

1

In [ChiantiPy documentation](http://chiantipy.readthedocs.io/en/stable/getting_started.html), there is no dependency on ipyparallel but the README.md file contains it. Maybe either of them needs an update..?

Make test data first: ```python import sep import numpy as np import pandas as pd def extractor(data, mask=None, thresh=0., maskthresh=0.0): data = data.astype(float) if mask is not None: mask =...