“Soldiers for Sale: German “Mercenaries” with the British in Canada during the American Revolution, 1776-83 (Book Review)” by Jean-Pierre Wilhelmy

Review of Soldiers for Sale: German “Mercenaries” with the British in Canada during the American Revolution, 1776-83 by Jean-Pierre Wilhelm

The Lick Observatory Supernova Search follow-up program: photometry data release of 70 stripped-envelope supernovae

We present BVRI and unfiltered Clear light curves of 70 stripped-envelope supernovae (SESNe), observed between 2003 and 2020, from the Lick Observatory Supernova Search (LOSS) follow-up program. Our SESN sample consists of 19 spectroscopically normal SNe~Ib, two peculiar SNe Ib, six SN Ibn, 14 normal SNe Ic, one peculiar SN Ic, ten SNe Ic-BL, 15 SNe IIb, one ambiguous SN IIb/Ib/c, and two superluminous SNe. Our follow-up photometry has (on a per-SN basis) a mean coverage of 81 photometric points (median of 58 points) and a mean cadence of 3.6d (median of 1.2d). From our full sample, a subset of 38 SNe have pre-maximum coverage in at least one passband, allowing for the peak brightness of each SN in this subset to be quantitatively determined. We describe our data collection and processing techniques, with emphasis toward our automated photometry pipeline, from which we derive publicly available data products to enable and encourage further study by the community. Using these data products, we derive host-galaxy extinction values through the empirical colour evolution relationship and, for the first time, produce accurate rise-time measurements for a large sample of SESNe in both optical and infrared passbands. By modeling multiband light curves, we find that SNe Ic tend to have lower ejecta masses and lower ejecta velocities than SNe~Ib and IIb, but higher $^{56}$Ni masses.Comment: Accepted by MNRA

Minimal information for studies of extracellular vesicles (MISEV2023): From basic to advanced approaches

Extracellular vesicles (EVs), through their complex cargo, can reflect the state of their cell of origin and change the functions and phenotypes of other cells. These features indicate strong biomarker and therapeutic potential and have generated broad interest, as evidenced by the steady year-on-year increase in the numbers of scientific publications about EVs. Important advances have been made in EV metrology and in understanding and applying EV biology. However, hurdles remain to realising the potential of EVs in domains ranging from basic biology to clinical applications due to challenges in EV nomenclature, separation from non-vesicular extracellular particles, characterisation and functional studies. To address the challenges and opportunities in this rapidly evolving field, the International Society for Extracellular Vesicles (ISEV) updates its 'Minimal Information for Studies of Extracellular Vesicles', which was first published in 2014 and then in 2018 as MISEV2014 and MISEV2018, respectively. The goal of the current document, MISEV2023, is to provide researchers with an updated snapshot of available approaches and their advantages and limitations for production, separation and characterisation of EVs from multiple sources, including cell culture, body fluids and solid tissues. In addition to presenting the latest state of the art in basic principles of EV research, this document also covers advanced techniques and approaches that are currently expanding the boundaries of the field. MISEV2023 also includes new sections on EV release and uptake and a brief discussion of in vivo approaches to study EVs. Compiling feedback from ISEV expert task forces and more than 1000 researchers, this document conveys the current state of EV research to facilitate robust scientific discoveries and move the field forward even more rapidly

SDSS-IV MaStar : a large and comprehensive empirical stellar spectral library—first release

We present the first release of the MaNGA Stellar Library (MaStar), which is a large, well-calibrated, high-quality empirical library covering the wavelength range 3622–10354 Å at a resolving power of R ~ 1800. The spectra were obtained using the same instrument as used by the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) project, by piggybacking on the Sloan Digital Sky Survey (SDSS-IV)/Apache Point Observatory Galaxy Evolution Experiment 2-N (APOGEE-2N) observations. Compared to previous empirical libraries, the MaStar library will have a higher number of stars and a more comprehensive stellar-parameter coverage, especially of cool dwarfs, low-metallicity stars, and stars with different [α/Fe], achieved by a sophisticated target-selection strategy that takes advantage of stellar-parameter catalogs from the literature. This empirical library will provide a new basis for stellar-population synthesis and is particularly well suited for stellar-population analysis of MaNGA galaxies. The first version of the library contains 8646 high-quality per-visit spectra for 3321 unique stars. Compared to photometry, the relative flux calibration of the library is accurate to 3.9% in g − r, 2.7% in r − i, and 2.2% in i − z. The data are released as part of SDSS Data Release 15. We expect the final release of the library to contain more than 10,000 stars.Publisher PDFPeer reviewe

Lick Observatory Supernova Search Follow-Up Program: Photometry Data Release of 93 Type Ia Supernovae

We present BVRI and unfiltered light curves of 93 Type Ia supernovae (SNe Ia) from the Lick Observatory Supernova Search (LOSS) follow-up program conducted between 2005 and 2018. Our sample consists of 78 spectroscopically normal SNe Ia, with the remainder divided between distinct subclasses (three SN 1991bg-like, three SN 1991T-like, four SNe Iax, two peculiar, and three super-Chandrasekhar events), and has a median redshift of 0.0192. The SNe in our sample have a median coverage of 16 photometric epochs at a cadence of 5.4 days, and the median first observed epoch is ~4.6 days before maximum B-band light. We describe how the SNe in our sample are discovered, observed, and processed, and we compare the results from our newly developed automated photometry pipeline to those from the previous processing pipeline used by LOSS. After investigating potential biases, we derive a final systematic uncertainty of 0.03 mag in BVRI for our dataset. We perform an analysis of our light curves with particular focus on using template fitting to measure the parameters that are useful in standardising SNe Ia as distance indicators. All of the data are available to the community, and we encourage future studies to incorporate our light curves in their analyses.Comment: 29 pages, 13 figures, accepted for publication in MNRA

The Ghost Story of the Great War: Spiritualism, Psychical Research and the British War Experience, 1914-1939.

This dissertation examines the role of the Great War in shaping British spiritualism and psychical between 1914 and 1939. Spiritualism can be defined as the belief in the survival of the human personality and the possibility of communication with the dead, particularly through the séance. Psychical research represented a more scientifically oriented and research focused approach to the supernatural. These movements originated in the nineteenth century as traditional religious authority waned. Meanwhile, scientists had harnessed unseen forces to make wireless communications possible, while others probed the mysterious world of the unconscious mind through trance. Spiritualism and psychical research flourished in the environment of the Great War alongside a host of other supernatural experiences and beliefs. Britons read prophecies about the coming new millennium, flocked to séances, experimented with telepathy, and saw the ghosts of their loved ones in dreams and in photographs. Soldiers had premonitions and saw visions on the battlefields. Some attributed their survival to angelic, psychic, or spiritual protection. Many of these individuals considered their beliefs to be based upon “scientific facts.” These experiences contrast sharply with our contemporary perspectives of the Great War as profane and futile, and conceptions of the modern world as rational and disenchanted. This dissertation explores the reasons for spiritualism and psychical research’s popularity as well as their ambivalent place in the war’s cultural memory. This dissertation argues that in the aftermath of the Great War, a segment of the British population turned to spiritualism and psychical researcher in order to build a heaven on earth. The unification of science and religion and the construction of a universal brotherhood gave the war meaning and had the potential to redeem the bloodshed. The outbreak of the Second World War, the Holocaust, and nuclear arms race recast these aims as foolish and naïve, thus accounting for the absence of spiritualist experiences in our contemporary memory

The Ghost Story of the Great War: Spiritualism, Psychical Research and the British War Experience, 1914-1939.

This dissertation examines the role of the Great War in shaping British spiritualism and psychical between 1914 and 1939. Spiritualism can be defined as the belief in the survival of the human personality and the possibility of communication with the dead, particularly through the séance. Psychical research represented a more scientifically oriented and research focused approach to the supernatural. These movements originated in the nineteenth century as traditional religious authority waned. Meanwhile, scientists had harnessed unseen forces to make wireless communications possible, while others probed the mysterious world of the unconscious mind through trance. Spiritualism and psychical research flourished in the environment of the Great War alongside a host of other supernatural experiences and beliefs. Britons read prophecies about the coming new millennium, flocked to séances, experimented with telepathy, and saw the ghosts of their loved ones in dreams and in photographs. Soldiers had premonitions and saw visions on the battlefields. Some attributed their survival to angelic, psychic, or spiritual protection. Many of these individuals considered their beliefs to be based upon “scientific facts.” These experiences contrast sharply with our contemporary perspectives of the Great War as profane and futile, and conceptions of the modern world as rational and disenchanted. This dissertation explores the reasons for spiritualism and psychical research’s popularity as well as their ambivalent place in the war’s cultural memory. This dissertation argues that in the aftermath of the Great War, a segment of the British population turned to spiritualism and psychical researcher in order to build a heaven on earth. The unification of science and religion and the construction of a universal brotherhood gave the war meaning and had the potential to redeem the bloodshed. The outbreak of the Second World War, the Holocaust, and nuclear arms race recast these aims as foolish and naïve, thus accounting for the absence of spiritualist experiences in our contemporary memory