A5088530210- Gamma-ray bursts and supernovae
- Stellar, planetary, and galactic studies
- Astrophysical Phenomena and Observations
- Neuroscience and Neuropharmacology Research
- Astrophysics and Star Formation Studies
- Biochemical Analysis and Sensing Techniques
- Memory and Neural Mechanisms
- Astro and Planetary Science
- Zebrafish Biomedical Research Applications
- Astronomy and Astrophysical Research
- Astrophysics and Cosmic Phenomena
- Galaxies: Formation, Evolution, Phenomena
- Pulsars and Gravitational Waves Research
- Particle Accelerators and Free-Electron Lasers
- Olfactory and Sensory Function Studies
- Planetary Science and Exploration
- Photoreceptor and optogenetics research
- Sleep and Wakefulness Research
- Neural dynamics and brain function
- Solar and Space Plasma Dynamics
- Radio Astronomy Observations and Technology
- Neural and Behavioral Psychology Studies
- Dark Matter and Cosmic Phenomena
- Cellular transport and secretion
- Adaptive optics and wavefront sensing
Hebrew University of Jerusalem
2024
Brandeis University
2018-2021
California Institute of Technology
2011-2018
University of Haifa
2012-2016
Bar-Ilan University
2004-2016
Microsoft (United States)
2016
Bellevue Hospital Center
2016
University of South Dakota
2012
Berlin University of the Arts
2012
University of Southern California
2012
We present the characterization of star KOI 961, an M dwarf with transit signals indicative three short-period exoplanets, originally discovered by Kepler Mission. proceed comparing 961 to Barnard's Star, a nearby, well-characterized mid-M dwarf. By colors, optical and near-infrared spectra, we find remarkable agreement between two, implying similar effective temperatures metallicities. Both are metal-poor compared Solar neighborhood, have low projected rotational velocity, high absolute...
PolyADP-ribose-polymerase 1 is activated in neurons that mediate several forms of long-term memory Aplysia. Because polyADP-ribosylation nuclear proteins a response to DNA damage virtually all eukaryotic cells, it surprising activation the polymerase occurs during learning and required for memory. We suggest fast transient decondensation chromatin structure by enables transcription needed form without strand breaks DNA.
We have commenced a multi-year program, the Caltech-NRAO Stripe 82 Survey (CNSS), to search for radio transients with Jansky VLA in SDSS region. The CNSS will deliver five epochs over entire $\sim$270 deg$^2$ of 82, an eventual deep combined map rms noise $\sim$40 $\mu$Jy and catalogs at frequency 3 GHz, having spatial resolution 3". This first paper presents results from initial pilot survey 50 region involving four spanning logarithmic timescales between one week 1.5 years, median 35...
Electrophysiological analysis has revealed much about the broad coding and neural ensemble dynamics that characterize gustatory cortical (GC) taste processing in awake rats how these relate to behavior. With regard mice, however, data concerning have largely been restricted imaging, a technique reveals average levels of responsiveness but (currently) lacks temporal sensitivity necessary for evaluation fast response dynamics; furthermore, few extant studies thus far failed provide consensus...
We present the latest results from a spectroscopic survey designed to uncover hidden population of AM Canum Venaticorum (AM CVn) binaries in photometric data base Sloan Digital Sky Survey (SDSS). selected ∼2000 candidates based on their colours, relatively small sample which is expected contain majority all CVn SDSS (expected be ∼50).
We use optical data from the Palomar Transient Factory (PTF) and Catalina Real-Time Survey (CRTS) to study variability of γ-ray-detected non-detected objects in a large population active galactic nuclei selected Candidate Gamma-Ray Blazar Fermi Space Telescope catalogues. Our samples include 714 sources with PTF 1244 CRTS data. calculate intrinsic modulation index quantify amplitude these samples. find be more variable than ones. The flat spectrum radio quasars (FSRQs) are BL Lac our sample,...
ABSTRACT PSR J2129−0429 is a “redback” eclipsing millisecond pulsar binary with an unusually long 15.2 hr orbit. It was discovered by the Green Bank Telescope in targeted search of unidentified Fermi gamma-ray sources. The companion optically bright (mean m R = 16.6 mag), allowing us to construct longest baseline photometric data set available for such system. We present 10 years archival and new photometry from Lincoln Near-Earth Asteroid Research Survey, Catalina Real-time Transient...
We present extensive photometric and spectroscopic observations of PTF1 J071912.13+485834.0, an outbursting AM CVn system discovered by the Palomar Transient Factory (PTF). systems are stellar binaries with some smallest separations known orbital periods ranging from 5 to 65 minutes. They believed be composed a white dwarf accretor (semi)-degenerate He-rich donor considered helium equivalents Cataclysmic Variables. have spectroscopically photometrically identified period 26.77 \pm 0.02...
The AM CVn systems are a class of He-rich, post-period minimum, semidetached, ultracompact binaries. Their long-term light curves have been poorly understood due to the few known and long (hundreds days) recurrence times between outbursts. We present combined photometric from Lincoln Near Earth Asteroid Research, Catalina Real-Time Transient Survey, Palomar Factory synoptic surveys study variability these over an almost 10 yr period. These provide much clearer picture outburst phenomena that...
We present first results from a new, multiyear, time domain survey of young stars in the North America Nebula complex using Palomar Transient Factory. Our is providing an unprecedented view aperiodic variability on timescales days to years. The analyzed sample covers RPTF ≈ 13.5–18 and spans range mid-infrared color, with larger-amplitude optical variables (exceeding 0.4 mag root mean squared) more likely have evidence for circumstellar material. This paper characterizes infrared excess...
Stellar rotation periods measured in open clusters have proved to be extremely useful for studying stars' angular momentum content and rotationally driven magnetic activity, which are both age- mass-dependent processes. While period measurements been obtained hundreds of solar-mass members the Pleiades, exist only a few low-mass ($<$0.5 M$_{\odot}$) this key laboratory stellar evolution theory. To fill gap, we report 132 Pleiades (including nearly 100 with M $\leq$ 0.45 M$_{\odot}$), from...
Two dedicated asteroid rotation-period surveys have been carried out using data taken on January 6-9 and February 20-23 of 2014 by the Intermediate Palomar Transient Factory (iPTF) in $R$~band with $\sim 20$-min cadence. The total survey area covered 174~deg$^2$ ecliptic plane. Reliable rotation periods for 1,438 asteroids are obtained from a larger set 6,551 mostly main-belt asteroids, each $\geq 10$~detections. Analysis 1751, PTF based, reliable clearly shows "spin barrier" at 2$~hours...
Cometary activity in main-belt asteroids probes the ice content of these objects and provides clues to history volatiles inner Solar system. We search Palomar Transient Factory survey derive upper limits on population size active comets (MBCs). From data collected from 2009 March through 2012 July, we extracted ∼2 million observations ∼220 thousand known (40 per cent population, down ∼1-km diameter) discovered 626 new multinight linked detections. formally quantify ‘extendedness’ a...
Abstract The current dogma suggests that the formation of long-term memory (LTM) is dependent on protein synthesis but persistence trace not. However, many studies examining effect inhibitors (PSIs) LTM were performed in hippocampus, which known to have a time-dependent role storage, rather than cortex, considered be main structure store memories. Here we studied PSIs and male Wistar Hola ( n ⩾5) rats by infusing inhibitor, anisomycin (100 μg, 1 μl), into gustatory cortex (GC) during...
Kepler satellite photometry and phase-resolved spectroscopy of the ultracompact AM CVn type binary SDSS J190817.07+394036.4 are presented. The average spectra reveal a variety weak metal lines different species, including silicon, sulphur magnesium as well many nitrogen, beside strong absorption neutral helium. phase-folded Doppler tomograms an S-wave in emission core He i 4471 Å line at period Porb = 1085.7 ± 2.8 s identifying this orbital system. Si ii, Mg ii some show with phase offset...
We report on PTF1 J191905.19+481506.2, a newly discovered, partially eclipsing, outbursting AM CVn system found in the Palomar Transient Factory synoptic survey. This is only second known eclipsing system. use high-speed photometric observations and phase-resolved spectroscopy to establish an orbital period of 22.4559(3) minutes. also present long-term light curve normal super-outbursts regularly seen this system, including super-outburst recurrence time 36.8(4) days. presence eclipse place...
Phase-resolved spectroscopy of four AM CVn systems obtained with the William Herschel Telescope and Gran Telescopio de Canarias (GTC) is presented. SDSS\,J120841.96+355025.2 was found to have an orbital period 52.96$\pm$0.40\,min shows presence a second bright spot in accretion disc. The average spectrum contains strong Mg\,{\sc i} Si\,{\sc i/ii} absorption lines most likely originating atmosphere accreting white dwarf. SDSS\,J012940.05+384210.4 has 37.555$\pm$0.003 min. Stark broadened DB...
The strength of learned associations between pairs stimuli is affected by multiple factors, the most extensively studied which prior experience with themselves. In contrast, little data available regarding how “incidental” (independent any conditioning situation) impacts later learning. This lack research striking given importance incidental to survival. We have recently begun fill this void using conditioned taste aversion (CTA), wherein an animal learns avoid a that has been associated...
Training with inedible food in Aplysia increased expression of the transcription factor C/EBP buccal ganglia, which primarily have a motor function, but not cerebral or pleural ganglia. mRNA immediately after training, as well 1–2 h later. The protein lagged increase mRNA. Stimulating lips and inducing feeding responses do lead to long-term memory did cause expression. Blocking polyADP-ribosylation, process necessary for affect
Many photometric time-domain surveys are driven by specific goals, such as searches for supernovae or transiting exoplanets, which set the cadence with fields re-imaged. In case of Palomar Transient Factory (PTF), several sub-surveys conducted in parallel, leading to non-uniform sampling over its $\sim$$20,000 \mathrm{deg}^2$ footprint. While median $7.26 PTF field has been imaged $\sim$40 times \textit{R}-band, $\sim$$2300 have observed $>$100 times. We use data study trade-off between...
In neuroscientists' attempts to understand the long-term storage of memory, topics particular importance and interest are cellular system mechanisms maintenance (e.g., those sensitive ζ-inhibitory peptide, ZIP) induced by memory retrieval (i.e., reconsolidation). Much is known about each these processes in isolation, but less concerning how they interact. It that ZIP sensitivity share at least some molecular targets recycling α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid, AMPA,...
In order to look for large super-fast rotators, five dedicated surveys covering ~ 188 square degree in the ecliptic plane have been carried out R-band with ~10 min cadence using intermediate Palomar Transient Factory late 2014 and early 2015. Among 1029 reliable rotation periods obtained from surveys, we discovered one new rotator, (40511) 1999 RE88, other 18 candidates. RE88 is an S-type inner main-belt asteroid a diameter of D = 1.9 +- 0.3 km, which has period P 1.96 0.01 hr lightcurve...
Brief experiences while a memory is consolidated may capture the consolidation, perhaps producing maladaptive memory, or interrupt consolidation. Since consolidation occurs during sleep, even fleeting when animals are awakened produce long-term In learning paradigm affecting Aplysia feeding, were trained after being from interactions between new and prevented by blocking arising experiences. Inhibiting protein synthesis eliminated block allowed brief, generally ineffective training to...
Conditioned taste aversion (CTA) is a form of one-trial learning dependent on basolateral amygdala projection neurons (BLApn). Its underlying cellular and molecular mechanisms remain poorly understood. RNAseq from BLApn identified changes in multiple candidate learning-related transcripts including the expected immediate early gene Fos Stk11, master kinase AMP-related pathway with important roles growth, metabolism development, but not previously implicated learning. Deletion Stk11 blocked...