Light Curve Customisation

When plotting light curves, plot() - and hence open() - accepts the following additional arguments.

Specifying Bands

If only certain photometric bands are of interest, the bands parameter can be passed as a list of bands that should be included in plotting:

from ATK import query

asassn_query = query("lightcurve", targets=6050296829033196032, survey="asassn", path="example_lightcurve.fits.gz")
asassn_query.open(bands=["g"])

Note

ATK supports the following lightcurve surveys and bands:

• ZTF - ztf (g, r, i)

• Gaia - gaia (g, bp, rp)

• ATLAS - atlas (c, o)

• ASAS-SN - asassn (g, v)

• TESS - tess (Tmag)

• CRTS - crts (v)

Setting Band Colours

The colours of each band can also be chosen:

asassn_query.open(bands=["v","g"], colours=["orange","blue"])

Note

The following colours are supported: "green", "red", "blue", "orange", "purple", "black"

Choosing a Colour Map

By default, the colour map scales relative to the mean brightness of the photometry in each band. This can be disabled by setting cmap = "flat" (default = "mean"):

asassn_query.open(cmap="flat")

Using Non-Reduced MJD

By default, the x-axis is reduced to show the time since the earliest observation in each set of light curves (i.e. the minimum MJD across all bands is subtracted). To instead plot the unmodified MJD, pass time_format = "original":

asassn_query.open(time_format="original")

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