English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

This paper presents the analysis of candidate quiescent low mass xray binarie(qLMXBs) observed during a short Chandra/ACIS observation of the globularcluster (GC) NGC 6304. Two out of the three candidate qLMXBs of this cluster,XMMU 171433-292747 and XMMU 171421-292917, lie within the field of view. Thispermits comparison with the discovery observation of these sources. The one inthe GC core -- XMMU 171433-292747 -- is spatially resolved into two separateX-ray sources, one of which is consistent with a pure H-atmosphere qLMXB, andthe other is an X-ray power-law spectrum source. These two spectral componentsseparately account for those observed from XMMU 171433-292747 in its discoveryobservation. We find that the observed flux and spectral parameters of theH-atmosphere spectral components are consistent with the previous observation,as expected from a qLMXB powered by deep crustal heating. XMMU 171421-292917also has neutron star atmosphere spectral parameters consistent with those inthe XMM-Newton observation and the observed flux has decreased by a factor0.54^{+0.30}_{-0.24}.

Chandra Observation of Quiescent Low-Mass X-ray Binaries in the Globular Cluster NGC 6304