---
title: "Plot X-ray source catalog"
output: rmarkdown::html_vignette
vignette: >
  %\VignetteIndexEntry{plot_xray_cat}
  %\VignetteEngine{knitr::rmarkdown}
  %\VignetteEncoding{UTF-8}
---

```{r, include = FALSE}
knitr::opts_chunk$set(
  collapse = TRUE,
  comment = "#>"
)
```

```{r setup}
library(ggsky)
library(ggplot2)
theme_set(theme_light())
```


This vignette demonstrates how to plot the ARTSS1–5 X-ray source catalog in galactic coordinates.

The dataset `artss15` is included in the package in a preprocessed form for reproducibility.
It is based on the CDS/VizieR catalog `J/A+A/687/A183` (bibcode: `2024A&A...687A.183S`).

Main variables used below:
- `l`, `b`: galactic longitude and latitude (degrees)
- `flux`: X-ray flux (`erg/s/cm^2`)

In the plot, point color represents `log10(flux)`.


# Plot 

```{r}
ggplot(artss15, aes(l, b, color = log10(flux))) +
  geom_point(alpha = 0.5) +
  scale_color_viridis_b() +
  labs(
    title = "ARTSS1–5 X-ray sources in galactic coordinates",
    caption = "Catalog: CDS/VizieR J/A+A/687/A183 | bibcode: 2024A&A...687A.183S",
    color = "log Fx\nerg/s/cm^2"
  ) +
  coord_galactic()
```