lcurvemaker

Python code for working with light curves of variable stars

Dependencies

• Matplotlib
• pandas
• Astropy

Installation

or

Usage

Positional arguments

is an alias of the object, optionally with the directory name. It is used to search for files and assign names to data processing products.

set default directory for saving plots (optional).

The script will search for a settings file named

in the

objects

directory. It should not contain spaces.

Options

• -h, --help
  show help message and exit
• -v, --verbose
  be more verbose
• -l, --lines
  draw lines on the light curve and phase plot to mark the epoch, maximum value, and max/min phase
• -s, --show
  show interactive plots instead of saving figures
• -c RA DEC, --coord RA DEC
  set the coordinates of the object in degrees
• -p PERIOD, --period PERIOD
  set the period for phase plot in days
• -e EPOCH, --epoch EPOCH
  set the epoch for phase plot in HJD
• -r MIN MAX, --ztfran MIN MAX
  delete all ZTF data out of range
• -o, --localps
  use local PS1 data instead of requesting it via the API
• -z, --zoom
  use settings for zoomed plot
• -m, --model
  draw a simple light curve model
• -t, --plot
  what data to plot. Possible values are: zt ps as at cs ga og gd

Examples

Result:

• Gusev 4 settings, phase plot, light curve
• Minkovskiy 24 settings, phase plot, light curve

To iterate over number of objects:

for PowerShell:

Object settings files

The settings for the object are located in a JSON file. sample.json contains most of the possible settings.

Basic settings for an object with

• ZTF,
• PS1,
• ASAS-SN,
• ASAS-3,
• ATLAS,
• CRTS,
• Gaia DR3,
• GDS,
• SuperWASP,
• OGLE,
• MASCARA,
• SDSS,
• SkyMapper Southern Sky Survey,
• Hipparcos,
• TESS,
• CoRoT,
• Kepler,
• K2 photometry data available are:

References for files in the

data

and

lc

directories

• Masci, F. J.; et al., 2019, The Zwicky Transient Facility: Data Processing, Products, and Archive, ZTF DR23 query form

• Chambers, K. C.; et al., 2016, The Pan-STARRS1 Surveys

• Pojmanski, G., 2002, The All Sky Automated Survey

• Kochanek, C. S.; et al., 2017, The All-Sky Automated Survey for Supernovae (ASAS-SN) Light Curve Server v1.0

• Tonry, J. L.; et al., 2018, ATLAS: A High-cadence All-sky Survey System

• Drake, A. J.; et al., 2009, Catalina Real-time Transient Survey

• Hackstein, M.; et al., 2015, The Bochum Survey of the Southern Galactic Disk: II. Follow-up measurements and multi-filter photometry for 1323 square degrees monitored in 2010 - 2015

• Butters, O. W.; et al., 2010, The first WASP public data release

• Udalski, A.; et al., 2008, The Optical Gravitational Lensing Experiment. Final Reductions of the OGLE-III Data

• Udalski, A.; et al., 2015, OGLE-IV: Fourth Phase of the Optical Gravitational Lensing Experiment

• Burggraaff, O.; et al., 2018, Studying bright variable stars with the Multi-site All-Sky CAmeRA (MASCARA)

• Perryman, M. A. C.; et al., 1997, The HIPPARCOS and TYCHO catalogues

• Gaia collaboration; et al., 2022, Gaia Data Release 3 (Gaia DR3) Part 1 Main source

• Gaia Photometric Science Alerts

• Huang, C. X.; et al., 2020, Photometry of 10 Million Stars from the First Two Years of TESS Full Frame Images: Part I

• Han, T.; Brandt, T. D., 2023, TESS-Gaia Light Curve: A PSF-based TESS FFI Light-curve Product

• Solano, E.; et al., 2009, The LAEX and NASA portals for CoRoT public data

• Howell, S. B.; et al., 2014, The K2 Mission: Characterization and Early Results

Variable stars studied with lcurvemaker: data tables and light curves

• Eclipsing binaries

Examples of light curves (presented in the VSX detail sheets)

Eclipsing binaries

• Gusev 4 settings, phase plot
• Minkovskiy 16 settings, phase plot
• GSC 02150-01562 phase plot
• UCAC3 170-058819 phase plot
• UCAC3 240-187355 phase plot
• UCAC3 248-199991 phase plot
• UCAC3 248-205306 phase plot
• USNO-B1.0 1534-0126575 phase plot
• USNO-B1.0 1534-0125222 phase plot, light curve
• ZTF19acdncga phase plot

Cataclysmic variables

• NSV 14686 phase plot, light curve

Pulsating variables

• DAV V8 phase plot, light curve
• DAV V10 phase plot, light curve
• DAV V11 phase plot, light curve

Image optimization applied

• TinyPNG: WebP, PNG, JPEG optimization
• OptiPNG, see guide to PNG optimization
• Jpegoptim, for Windows
• JPEGoptim + OptiPNG + TinyPNG - image optimization (in russian)