# JVLA overview of the bursting H$_2$O maser source G25.65+1.05

## TL;DR

This paper presents JVLA observations of the bursting H$_2$O maser source G25.65+1.05, providing high-resolution maps and positional data, revealing the spatial relationship between maser spots and continuum components in a massive star-forming region.

## Contribution

First high-resolution mapping of H$_2$O and CH$_3$OH masers in G25.65+1.05, with precise positioning and continuum component analysis during a maser burst event.

## Key findings

- Detected four continuum components with a linear arrangement.
- Mapped maser spots at 22 GHz and 44 GHz with milliarcsecond accuracy.
- Identified potential physical link between continuum components.

## Abstract

The source G25.65+1.05 (RAFGL7009S, IRAS 18316-0602) is the least studied of the three regions of massive star formation known to show exceptionally powerful H$_2$O maser bursts. We report spectral line observations of the H$_2$O maser at 22 GHz, the methanol maser transitions at 6.7, 12.2 and 44 GHz, and the continuum in these same frequency bands with The Karl G. Jansky Very Large Array (JVLA) at the post-burst epoch of 2017. For the first time, maps of 22 GHz H$_2$O and 44 GHz CH$_3$OH maser spots are obtained and the absolute position of the 22 GHz H$_2$O bursting feature is determined with milliarcsecond precision. We detected four continuum components, three of which are closely spaced in a linear orientation, suggesting a physical link between them.