Tootfinder

Somehow, #Costco was *out of carts*. I don't know how that happens. There were people waiting at the entrance, trailing other people to their cars to grab their carts.
"No sweat," I told the security people at the store entrance. "I brought my own cart."
#BikeTooter

Spent the evening at a music show by the Elliot Freedman Group.
It was hosted by Notional Space, a gift economy run venue that is a unique private home in my neighbourhood.
I love what Mark & Yumi are doing with the space. We need more like this.
#Vancouver #EastVan

This https://arxiv.org/abs/2204.10148 has been replaced.
link: https://scholar.google.com/scholar?q=a

ALICE luminosity determination for Pb$-$Pb collisions at $\sqrt{s_{\mathrm{NN}}} = 5.02$ TeV
Luminosity determination within the ALICE experiment is based on the measurement, in van der Meer scans, of the cross sections for visible processes involving one or more detectors (visible cross sections). In 2015 and 2018, the Large Hadron Collider provided Pb$-$Pb collisions at a centre-of-mass energy per nucleon pair of $\sqrt{s_{\rm NN}} = 5.02$ TeV. Two visible cross sections, associated with particle detection in the Zero Degree Calorimeter (ZDC) and in the V0 detector, were measured in …

Understanding the phenomenological and intrinsic blazar sequence using a simple scaling model
Zhu-Jian Wan, Rui Xue, Ze-Rui Wang, Hu-Bing Xiao, Jun-Hui Fan
https://arxiv.org/abs/2402.09924

Understanding the phenomenological and intrinsic blazar sequence using a simple scaling model
The blazar sequence, including negative correlations between radiative luminosity $L_{\rm rad}$ and synchrotron peak frequency $ν$, and between Compton dominance $Y$ and $ν$, is widely adopted as a phenomenological description of spectral energy distributions (SEDs) of blazars, although its underlying cause is hotly debated. In particular, these correlations turn positive after correcting Doppler boosting effect. In this work, we revisit the phenomenological and intrinsic blazar sequence with…

Observation of $D \to a_{0}(980)\pi$ in the decays $D^{0} \rightarrow \pi^{ }\pi^{-}\eta$ and $D^{ } \rightarrow \pi^{ }\pi^{0}\eta$
BESIII Collaboration, et al.
https://arxiv.org/abs/2404.09219

Observation of $D \to a_{0}(980)π$ in the decays $D^{0} \rightarrow π^{+}π^{-}η$ and $D^{+} \rightarrow π^{+}π^{0}η$
We report the first amplitude analysis of the decays $D^{0} \to Ï€^{+} Ï€^{-} η$ and $D^{+} \rightarrow Ï€^{+}Ï€^{0}η$ using a data sample taken with the BESIII detector at the center-of-mass energy of 3.773 GeV, corresponding to an integrated luminosity of 7.9 ${\rm fb}^{-1}$. The contribution from the process $D^{0(+)} \to a_{0}(980)^{+} Ï€^{-(0)}$ is significantly larger than the $D^{0(+)} \to a_{0}(980)^{-(0)} Ï€^{+}$ contribution. The ratios $\mathcal{B}(D^{0} \rightarrow a_{0}(980)^{+}Ï…

This https://arxiv.org/abs/2402.07275 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

An X-ray Census of Active Galactic Nuclei in the Virgo and Fornax Clusters of Galaxies with SRG/eROSITA
We present a uniform and sensitive X-ray census of active galactic nuclei (AGNs) in the two nearest galaxy clusters, Virgo and Fornax, utilizing the newly released X-ray source catalogs from the first all-sky scan of SRG/eROSITA. A total of 50 and 10 X-ray sources are found positionally coincident with the nuclei of member galaxies in Virgo and Fornax, respectively, down to a 0.2-2.3 keV luminosity of $\sim10^{39}\rm~erg~s^{-1}$ and reaching out to a projected distance well beyond the virial ra…

This https://arxiv.org/abs/2402.07275 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

An X-ray Census of Active Galactic Nuclei in the Virgo and Fornax Clusters of Galaxies with SRG/eROSITA
We present a uniform and sensitive X-ray census of active galactic nuclei (AGNs) in the two nearest galaxy clusters, Virgo and Fornax, utilizing the newly released X-ray source catalogs from the first all-sky scan of SRG/eROSITA. A total of 50 and 10 X-ray sources are found positionally coincident with the nuclei of member galaxies in Virgo and Fornax, respectively, down to a 0.2-2.3 keV luminosity of $\sim10^{39}\rm~erg~s^{-1}$ and reaching out to a projected distance well beyond the virial ra…

SN 2023zaw: an ultra-stripped, nickel-poor supernova from a low-mass progenitor
Kaustav K. Das, Christoffer Fremling, Mansi M. Kasliwal, Steve Schulze, Jesper Sollerman, Viraj Karambelkar, Sam Rose, Shreya Anand, Igor Andreoni, Marie Aubert, Sean J. Brennan, S. Bradley Cenko, Michael W. Coughlin, B. O'Connor, Kishalay De, Jim Fuller, Matthew Graham, Erica Hammerstein, Annastasia Haynie, K-Ryan Hinds, Io Kleiser, S. R. Kulkarni, Zeren Lin, Chang Liu, Ashish A. Mahabal, Christopher M…

SN 2023zaw: an ultra-stripped, nickel-poor supernova from a low-mass progenitor
We present SN 2023zaw $-$ a sub-luminous ($\mathrm{M_r} = -16.7$ mag) and rapidly-evolving supernova ($\mathrm{t_{1/2,r}} = 4.9$ days), with the lowest nickel mass ($\approx0.002$ $\mathrm{M_\odot}$) measured among all stripped-envelope supernovae discovered to date. The photospheric spectra are dominated by broad He I and Ca NIR emission lines with velocities of $\sim10\ 000 - 12\ 000$ $\mathrm{km\ s^{-1}}$. The late-time spectra show prominent narrow He I emission lines at $\sim$1000$\ \mathr…

Accretion properties of X-ray AGN: Evidence for radiation-regulated obscuration with redshift-dependent host galaxy contribution
Brivael Laloux, Antonis Georgakakis, David M. Alexander, Johannes Buchner, Carolina Andonie, Nischal Acharya, James Aird, Alba V. Alonso-Tetilla, Angela Bongiorno, Ryan C. Hickox, Andrea Lapi, Blessing Musiimenta, Cristina Ramos Almeida, Carolin Vellforth, Francesco Shankar

Accretion properties of X-ray AGN: Evidence for radiation-regulated obscuration with redshift-dependent host galaxy contribution
We adopt a Bayesian X-ray spectral approach to investigate the accretion properties of unobscured ($20<\log(N_{\rm H}/{\rm cm}^{-2}<22$) and obscured ($22< \log(N_{\rm H}/{\rm cm}^{-2}<24$) active galactic nuclei (AGN) to shed light on the orientation vs evolution scenarios for the origin of the obscuring material. For a sample of 3882 X-ray-selected AGN from the Chandra COSMOS Legacy, AEGIS and CDFS extragalactic surveys, we constrain their stellar masses, $M_\star$, intrinsic X-ray luminositi…

SN 2023zaw: an ultra-stripped, nickel-poor supernova from a low-mass progenitor
Kaustav K. Das, Christoffer Fremling, Mansi M. Kasliwal, Steve Schulze, Jesper Sollerman, Viraj Karambelkar, Sam Rose, Shreya Anand, Igor Andreoni, Marie Aubert, Sean J. Brennan, S. Bradley Cenko, Michael W. Coughlin, B. O'Connor, Kishalay De, Jim Fuller, Matthew Graham, Erica Hammerstein, Annastasia Haynie, K-Ryan Hinds, Io Kleiser, S. R. Kulkarni, Zeren Lin, Chang Liu, Ashish A. Mahabal, Christopher M…

SN 2023zaw: an ultra-stripped, nickel-poor supernova from a low-mass progenitor
We present SN 2023zaw $-$ a sub-luminous ($\mathrm{M_r} = -16.7$ mag) and rapidly-evolving supernova ($\mathrm{t_{1/2,r}} = 4.9$ days), with the lowest nickel mass ($\approx0.002$ $\mathrm{M_\odot}$) measured among all stripped-envelope supernovae discovered to date. The photospheric spectra are dominated by broad He I and Ca NIR emission lines with velocities of $\sim10\ 000 - 12\ 000$ $\mathrm{km\ s^{-1}}$. The late-time spectra show prominent narrow He I emission lines at $\sim$1000$\ \mathr…