Abstract
Abstract We report a historic K s -band light curve spanning over three decades of the FUor PGIR20dci recently discovered by Hillenbrand et al. We find some minor variability of the object prior to the FUor outburst, an initial rather slow rise in brightness, followed in 2019 by a much steeper rise to the maximum.
Highlights
The FUor eruption of the Class I object PGIR20dci in the NGC281W star-forming region was recently discovered by Hillenbrand et al (2021) in the Palomar Gattini Infrared (PGIR) survey
We report a historic Ks-band light curve spanning over three decades of the FUor PGIR20dci recently discovered by Hillenbrand et al (2021)
PGIR20dci was recorded with WFCAM (Casali et al 2007) on UKIRT as part of the US Naval Observatory UKIRT Northern Hemisphere K-band survey UHSK (Dahm et al 2018) in 2019
Summary
The FUor eruption of the Class I object PGIR20dci in the NGC281W star-forming region was recently discovered by Hillenbrand et al (2021) in the Palomar Gattini Infrared (PGIR) survey. Their near-infrared spectroscopy confirmed that this object is currently undergoing a FUor (Herbig 1977) outburst. The published light curve relied on Spitzer, WISE and NEOWISE photometry, with WISE having rather poor spatial resolution. This Research Note reports the pre-outburst and outburst light curve based on ground-based Ks-band images
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