Short time-scale optical variability of the dwarf Seyfert nucleus in NGC 4395

We present optical spectroscopic observations of the least-luminous known Seyfert 1 galaxy, NGC 4395, which was monitored every half-hour over the course of 3 nights. The continuum emission varied by ~35 per cent over the course of 3 nights, and we find marginal evidence for greater variability in the blue continuum than the red. A number of diagnostic checks were performed on the data in order to constrain any systematic or aperture effects. No correlations were found that adequately explained the observed variability, hence we conclude that we have observed real intrinsic variability of the nuclear source. No simultaneous variability was measured in the broad H-beta line, although given the difficulty in deblending the broad and narrow components it is difficult to comment on the significance of this result. The observed short time-scale continuum variability is consistent with NGC 4395 having an intermediate-mass (~10^5 solar masses) central supermassive black hole, rather than a very low accretion rate. Comparison with the Seyfert 1 galaxy NGC 5548 shows that the observed variability seems to scale with black hole mass in roughly the manner expected in accretion models. However the absolute time-scale of variability differs by several orders of magnitude from that expected in simple accretion disc models in both cases.Comment: 16 pages, 14 figures, 5 tables, accepted for publication in MNRA

Functional Mobility Management Of A Patient With Adult-Onset Hereditary Proximal Motor Neuropathy Following A Tibial Fracture: A Case Report

This patient was clinically appealing and complex because of the combination of an acute fracture due to an injurious fall and significant past medical history (PMH) of both the rare condition of adult-onset hereditary proximal motor neuropathy (AHPMN) and congestive heart failure (CHF). The chronic co-morbidities created the need for an innovative approach to treatment sequencing to potentially mitigate the risk for excessive fatigue, such as positional grouping of interventions and prescribed rest periods. This unique opportunity to document the physical therapy (PT) management of a patient with the combination of both rare and chronic conditions makes this case a valuable addition to the existing literature. The purpose of this case report was to document the outcomes of various functional mobility interventions for a geriatric patient with an acute left (L) tibial fracture secondary to a fall, adult-onset hereditary proximal motor neuropathy and CHF. This case report may help fill a gap in the literature, which is sparse with functional mobility treatment for patients with acute injury in conjunction with a rare, chronic condition.https://dune.une.edu/pt_studcrposter/1059/thumbnail.jp