# Late Central Engine Activity in GRB 180205A

## TL;DR

This paper analyzes optical and X-ray afterglow data of GRB 180205A, revealing late central engine activity as the likely cause of early-time anomalies in the light curves.

## Contribution

It provides detailed optical and X-ray observations of GRB 180205A and interprets early afterglow features as evidence of late central engine activity.

## Key findings

- Optical afterglow shows a flat plateau.
- X-ray light curve exhibits a flare.
- Late central engine activity explains early-time anomalies.

## Abstract

We present optical photometry of the afterglow of the long GRB 180205A with the COATLI telescope from 217 seconds to about 5 days after the {\itshape Swift}/BAT trigger. We analyse this photometry in the conjunction with the X-ray light curve from {\itshape Swift}/XRT. The late-time light curves and spectra are consistent with the standard forward-shock scenario. However, the early-time optical and X-ray light curves show non-typical behavior; the optical light curve exhibits a flat plateau while the X-ray light curve shows a flare. We explore several scenarios and conclude that the most likely explanation for the early behavior is late activity of the central engine.