Proposal Details - 0820018
Continuing monitoring of NGC 4151 (Zdziarski)

Proposal Summary (based on proposal abstract)

The proposal continues the monitoring of the X-ray brightest Seyfert galaxy NGC 4151 with INTEGRAL, in order to measure its spectra as a function of the hard X-ray flux level. It will correlate the high energy spectral cutoff with other continuum parameters to determine the main physical mechanism driving the variability. It will also disentangle the contributions to the reflection hump from close and distant reflectors, and correlate those with the narrow iron line variability to determine the nature of the thick reprocessing medium and the geometry of cold matter surrounding the source. It will finally probe for the existence of a hard non-thermal tail.

Observation Strategy (Recommended by TAC)

Total of 800 ks in the standard 5x5 dithering mode centered on RA, Dec = 186.875, 6.075 (l, b = 286.728, 68.190), split in four observations of 200 ks each over the whole of AO-8. The four observations will be simultaneously done with four accepted exposures of 10 ks each with XMM-Newton, i.e., one XMM-Newton pointing per INTEGRAL observation.

Proposal grade: A

Data Rights (Recommended by TAC)

The TAC has allocated the following specific Data Rights to this proposal: NGC 4151.

Exposure Map

Exposure maps are in units of s and shown using Galactic coordinates. The intensity scale is given by the colourbar, and there are contour levels at 100, 300 and 500 ks.