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 Plus annual

Presents the access of premium content as premium feature

Premium Content

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 annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

We report on 0.3-10 keV X-ray observations by the Chandra X-ray Observatoryof the fields of 22 sources that were discovered as hard X-ray (20-100 keV)sources by the INTEGRAL satellite (IGR sources). The purpose of the Chandraobservations is to localize the sources and to measure their soft X-ray spectrain order to determine the nature of the sources. We find very likely Chandracounterparts for 18 of the 22 sources. We discuss the implications for eachsource, considering previous results and new optical or IR identifications, andwe identify or suggest identifications for the nature of 16 of the sources. Twoof the sources, IGR J14003-6326 and IGR J17448-3232, are extended on arcminutescales. We identify the former as a pulsar wind nebula (PWN) with a surroundingsupernova remnant (SNR) and the latter as a SNR. In the group of 242 IGRsources, there is only one other source that has previously been identified asa SNR. We confirm a previous identification of IGR J14331-6112 as an High-MassX-ray Binary (HMXB), and we suggest that IGR J17404-3655, IGR J16287-5021, IGRJ17354-3255, IGR J17507-2647, IGR J17586-2129, and IGR J13186-6257 arecandidate HMXBs. Our results indicate or confirm that IGR J19267+1325, IGRJ18173-2509, and IGR J18308-1232 are Cataclysmic Variables (CVs), and wesuggest that IGR J15529-5029 may also be a CV. We confirm that IGR J14471-6414is an Active Galactic Nucleus (AGN), and we also suggest that IGR J19443+2117and IGR J18485-0047 may be AGN. Finally, we found Chandra counterparts for IGRJ11098-6457 and IGR J18134-1636, but more information is required to determinethe nature of these two sources.

Chandra Localizations and Spectra of INTEGRAL Sources in the Galactic Plane: The Cycle 9 Sample