A lanthanide-rich kilonova in the aftermath of a long gamma-ray burst.

Observationally, kilonovae are astrophysical transients powered by the radioactive decay of nuclei heavier than iron, thought to be synthesized in the merger of two compact objects. Over the first few days, the kilonova evolution is dominated by a large number of radioactive isotopes contributing to the heating rate. On timescales of weeks to months, its behaviour is predicted to differ depending on the ejecta composition and the merger remnant.

A structured jet explains the extreme GRB 221009A.

Long-duration gamma-ray bursts (GRBs) are powerful cosmic explosions, signaling the death of massive stars. Among them, GRB 221009A is by far the brightest burst ever observed. Because of its enormous energy ( ≈ 10 erg) and proximity ( ≈ 0.

Transforming care for patients living with diabetes in rural Mexico: a qualitative study of patient and provider experiences and perceptions of shared medical appointments.

Background: Global prevalence of diabetes is increasing, causing widespread morbidity, mortality and increased healthcare costs. Providing quality care in a timely fashion to people with diabetes in low-resource settings can be challenging. In the underserved state of Chiapas, Mexico, which has some of the lowest diabetes detection and control rates in the country, there is a need to implement strategies that improve care for patients with diabetes.

A comprehensive and healthcare equity promoting response by a civil society-public partnership to COVID-19 in Chiapas, Mexico.

Following the first COVID-19 case in Chiapas, Mexico in March 2020, the non-governmental organisation Compañeros En Salud (CES) and the state's Ministry of Health (MOH) decided to join forces to respond to the global pandemic. The collaboration was built over 8 years of partnership to bring healthcare to underserved populations in the Sierra Madre region. The response consisted of a comprehensive SARS-CoV-2 infection prevention and control programme, which included prevention through communication campaigns to combat misinformation and stigma related to COVID-19, contact tracing of suspected and confirmed COVID-19 cases and their contacts, outpatient and inpatient care for patients with respiratory symptoms, and CES-MOH collaboration on anti-COVID-19 immunisation campaigns.

Kilohertz quasiperiodic oscillations in short gamma-ray bursts.

Short gamma-ray bursts (GRBs) are associated with binary neutron star mergers, which are multimessenger astronomical events that have been observed both in gravitational waves and in the multiband electromagnetic spectrum. Depending on the masses of the stars in the binary and on details of their largely unknown equation of state, a dynamically evolving and short-lived neutron star may be formed after the merger, existing for approximately 10-300 ms before collapsing to a black hole. Numerical relativity simulations across different groups consistently show broad power spectral features in the 1-5-kHz range in the post-merger gravitational-wave signal, which is inaccessible by current gravitational-wave detectors but could be seen by future third-generation ground-based detectors in the next decade.

A nearby long gamma-ray burst from a merger of compact objects.

Gamma-ray bursts (GRBs) are flashes of high-energy radiation arising from energetic cosmic explosions. Bursts of long (greater than two seconds) duration are produced by the core-collapse of massive stars, and those of short (less than two seconds) duration by the merger of compact objects, such as two neutron stars. A third class of events with hybrid high-energy properties was identified, but never conclusively linked to a stellar progenitor.

Multiple Galactic Sources with Emission Above 56 TeV Detected by HAWC.

We present the first catalog of gamma-ray sources emitting above 56 and 100 TeV with data from the High Altitude Water Cherenkov Observatory, a wide field-of-view observatory capable of detecting gamma rays up to a few hundred TeV. Nine sources are observed above 56 TeV, all of which are likely galactic in origin. Three sources continue emitting past 100 TeV, making this the highest-energy gamma-ray source catalog to date.

Publisher Correction: Very-high-energy particle acceleration powered by the jets of the microquasar SS 433.

In this Letter, owing to a production error, the penultimate version of the PDF was published. The HTML version was always correct. The PDF has been corrected online.

Very-high-energy particle acceleration powered by the jets of the microquasar SS 433.

SS 433 is a binary system containing a supergiant star that is overflowing its Roche lobe with matter accreting onto a compact object (either a black hole or neutron star). Two jets of ionized matter with a bulk velocity of approximately 0.26c (where c is the speed of light in vacuum) extend from the binary, perpendicular to the line of sight, and terminate inside W50, a supernova remnant that is being distorted by the jets.

Hyperactivity of caudate, parahippocampal, and prefrontal regions during working memory in never-medicated persons at clinical high-risk for psychosis.

Background: Deficits in working memory (WM) are a core feature of schizophrenia (SZ) and other psychotic disorders. We examined brain activity during WM in persons at clinical high risk (CHR) for psychosis.

Methods: Thirty-seven CHR and 34 healthy control participants underwent functional MRI (fMRI) on a 3.

The use of nalmefene for intrathecal opioid-associated nausea in postpartum patients.

The aim of this study was to compare the severity of nausea and incidence of emesis in laboring parturients who received intravenous nalmefene or placebo following an intrathecal opioid (ITO). We randomly assigned 60 ASA class I or II multiparous women to receive nalmefene or placebo. Subjects received fentanyl, 25 micrograms, and morphine, 250 micrograms, intrathecally on request for analgesia.