| PROPOSAL OVERVIEW | |
| Proposal Title | Disc precession or a sub-milliparsec SMBH binary in a QPE galactic nucleus |
| Proposal Category | Active Galactic Nuclei, Quasars, BL-Lac Objects and Tidal Disruption Events |
| Proposal Type | LARGE PROGRAM |
| Proposal Id | 096099 |
| Number of Observations | 3 |
| Total exposure time (ks) | 792 |
| PI DETAILS | |
| PI | Dr. Giovanni Miniutti |
| Institute | Centro de Astrobiolog?a (CSIC-INTA) |
| Country | SPAIN |
| CO-INVESTIGATORS | ||
| Name | Country | |
| M. Giustini | SPAIN | |
| R. Arcodia | UNITED STATES | |
| R. Saxton | SPAIN | |
| E. Quintin | SPAIN | |
| J. Chakraborty | UNITED STATES | |
| A. Franchini | SWITZERLAND | |
| M. Bonetti | ITALY | |
| ABSTRACT | |
| A recent, detailed analysis of X-ray quasi-periodic eruptions (QPEs) in GSN 069, the first galactic nucleus in which QPEs were identified, reveals that their arrival times are consistent with being modulated on a ~19-20 d timescale. Within the context of the leading secondary-disc impacts model for QPEs, this can only occur if an external modulation is present. We propose XMM-Newton observations to unambiguously distinguish between the two scenarios that are consistent with current data: disc precession or orbital motion of the QPE-emitting system within a supermassive black hole binary with sub-milliparsec separation. | |
| PAPERS |
| - CLASS 1: | papers that present specific XMM-Newton observations |
| - CLASS 2: | papers that refer to published XMM-Newton results with complementary observations, follow-up analysis, or theoretical analysis |
| - CLASS 3: | further deliveries which resulted from the program and which are made available to the community (e.g. source catalogues, processed images or spectra in public data base) |
| - CLASS 4: | comments and suggestions from PI |