Hernández Santisteban, J.V.

Page, D.

Parikh, A.S.

Wijnands, R.

English

MASTER OT 075353.88+174907.6 was a blue optical transient reported by the MASTER-Net project on 2017 Oct 31. We carried out multiwavelength followup observations of this source during its 2017 outburst using Swift and RATIR. The source was found to be ∼&gt;4.4 mag above its quiescent level during the peak of the outburst and the outburst lasted ∼&gt;19 days. Our observations suggest that it was a superoutburst of a long period U Geminorum type dwarf nova system. The spectral energy distribution during the initial slow decay phase of the outburst was consistent with a disk-dominated spectrum (with spectral indices Γ ≈1.5–2.3). Afterwards, the UV flux decreased slowlier than the optical and the spectral energy distribution was very steep with indices Γ ≈3.7 ±0.7. This slow UV decay may be the emission from a cooling white dwarf heated during the outburst. No X-ray emission was detected from the source since it is likely located at a large distance &gt;2.3 kpc

International Migration, Integration and Social Cohesion online publications

Multiwavelength Observations of MASTER OT 075353.88+174907.6:A Likely Superoutburst of a Long Period Dwarf Nova System

https://pure.uva.nl/ws/files/46343350/MULTIWAVELENGTH_OBSERVATIONS_OF_MASTER_OT.pdf

Multiwavelength Observations of MASTER OT 075353.88+174907.6:A Likely Superoutburst of a Long Period Dwarf Nova System

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International Migration, Integration and Social Cohesion online publications