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Disentagling the optical emission mechanisms in tidal disruption events

P72-010 Koljonen

Summary:

Tidal disruption events (TDEs) are ideal targets to probe the formation of accretion disks and accompanying outflows. Multiwavelength observations of TDEs have revealed a surprisingly diverse population. Especially, the so-called optical TDEs have shown late-time X-ray and radio emission years after the optical peak emission indicating delayed accretion disk formation and long timescales for the circularization process. Therefore, the origin of the prompt optical emission of these events remains unclear. Here, we propose imaging polarimetry of tidal disruption events to understand the location and properties of the optical emission and subsequently the formation process of the accretion disk around supermassive black holes. ***


Calibrations

Internal flats, arcs and bias frames from alfosc-calibs

Observations

Our immediate objective is to follow the polarization evolution of optically bright TDEs. Observations should be done in 2-3 weeks cadence (8 in total for one target). For each observation, we require linear polarimetric observations in two different filters (Bessel V and R) using the standard ALFOSC setup. Please, make sure to center the target in the image. The PI will send the target and observing information using the OB generator when this ToO is triggered (2 triggers/targets in total).

Available scripts

Go to the directory
  cd ~/scripts/72-010

execute the requested scripts.

Program Tracking
Proposal 72-010
Semester P72: 20251001 - 20260401
Principal Investigator K. Koljonen
Programme Disentagling the optical emission mechanisms in tidal disruption events
Instrument ALFOSC
Time Allocation 20 hours SoftToO
Total Nights 20h
Type SoftToO
Notes Soft triggers during Nordic service or Technical nights
Total Time Spent (hh:mm)
Proposal Date Time Type Targets Files Comments Status
Empty table: no tracking data available (yet)

 

The above information is collected from the ToO/Mon reports that have been created by the observer.

Should any of the observations have been carried out using the OB system, you will find additional information HERE

Back to top Last modified: September 12 2025