Light Curves and Difference Imaging Data

Below are light curves and difference imaging videos for a subset of galaxies from Baldassare, Geha, and Greene (2018) with AGN-like variability.

For each galaxy, we show the following:

  1.  Image from the DECaLs image server (legacysurvey.org), with the 2.5" nuclear aperture over-plotted.  

  2.  Video showing the difference images of the galaxy. Difference images are generated using a slightly modified version of the difference imaging pipeline DIAPL2 (Wozniak 2000). The two apertures shown on the difference images are a circle with radius of 2.5" (the nucleus), and an aperture for the full galaxy, generated from the elliptical Petrosian parameters derived in the NASA-Sloan Atlas. 

  3.  Nuclear light curve, calculated within the central 2.5" aperture. The gray points are the data, the blue solid line shows the best fit damped random walk model from QSO_fit (Butler & Bloom 2011), and the light blue shaded region shows the model uncertainties.

NSA 40018

NSA40018_20a_cutout.png

Stellar mass: 7.8e9 Msun

Redshift: 0.107

BPT position: AGN 

 

 
ModLC_NSA40018.png

NSA 32653

 
NSA32653_20a_cutout.png

Stellar mass: 2.9e9 Msun

Redshift: 0.114

BPT position: AGN 

 

ModLC_NSA32653.png

NSA 305046

NSA305046_20a_cutout.png

Stellar mass: 6.3e9 Msun

Redshift: 0.091

BPT position: AGN 

 

ModLC_NSA305046.png

NSA 214788

 
NSA214788_20a_cutout.png

Stellar mass: 1.6e9 Msun

Redshift: 0.058

BPT position: Star forming

 

ModLC_NSA214788.png

NSA 217124

 
NSA217124_20a_cutout.png

Stellar mass: 2.8e8 Msun

Redshift: 0.041

BPT position: Star forming

 

ModLC_NSA217124.png
 

NSA 35245

 
NSA35245_20a_cutout.png

Stellar mass: 1.7e9 Msun

Redshift: 0.075

BPT position: Star forming

 

ModLC_NSA35245.png