DEEP OPTICAL OBSERVATIONS of UNUSUAL NEUTRON STAR CALVERA with the GTC
Astrophysical Journal, ISSN: 1538-4357, Vol: 831, Issue: 1
2016
- 11Citations
- 7Captures
Metric Options: Counts1 Year3 YearSelecting the 1-year or 3-year option will change the metrics count to percentiles, illustrating how an article or review compares to other articles or reviews within the selected time period in the same journal. Selecting the 1-year option compares the metrics against other articles/reviews that were also published in the same calendar year. Selecting the 3-year option compares the metrics against other articles/reviews that were also published in the same calendar year plus the two years prior.
Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
Citation Benchmarking is provided by Scopus and SciVal and is different from the metrics context provided by PlumX Metrics.
Example: if you select the 1-year option for an article published in 2019 and a metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019. If you select the 3-year option for the same article published in 2019 and the metric category shows 90%, that means that the article or review is performing better than 90% of the other articles/reviews published in that journal in 2019, 2018 and 2017.
Citation Benchmarking is provided by Scopus and SciVal and is different from the metrics context provided by PlumX Metrics.
Article Description
Calvera is an unusual, isolated neutron star with a pure thermal X-ray spectrum typical of central compact objects in supernova remnants. On the other hand, its rotation period and spin-down rate are typical of ordinary rotationpowered pulsars. It was discovered and studied through X-rays, and has not yet been detected in other spectral domains. We present deep optical imaging of the Calvera field, obtained with the Gran Telescopio Canarias, in the g′ and i′ bands. Within the vicinity of ≈1′ of Calvera, we detected two point-like objects that were invisible at previous shallow observations. However, accurate astrometry showed that neither of them can be identified with the pulsar. We put new upper limits of g′ > 27.87 and i′ > 26.84 on its optical brightness. We also reanalyzed all available archival X-ray data on Calvera. Comparison of the Calvera thermal emission parameters and upper limits on optical and non-thermal X-ray emission with respective data on rotation-powered pulsars shows that Calvera might belong to the class of ordinary middle-aged pulsars, if we assume that its distance is in the range of 1.5-5 kpc.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84994205168&origin=inward; http://dx.doi.org/10.3847/0004-637x/831/1/112; https://iopscience.iop.org/article/10.3847/0004-637X/831/1/112; http://stacks.iop.org/0004-637X/831/i=1/a=112?key=crossref.2e28639066a83d280ffea8ee29183d74; http://stacks.iop.org/0004-637X/831/i=1/a=112/pdf; https://dx.doi.org/10.3847/0004-637x/831/1/112; https://validate.perfdrive.com/9730847aceed30627ebd520e46ee70b2/?ssa=27c89622-c6aa-4014-a400-38b9e468a6a7&ssb=52574294075&ssc=https%3A%2F%2Fiopscience.iop.org%2Farticle%2F10.3847%2F0004-637X%2F831%2F1%2F112&ssi=0b4d5578-cnvj-4cfd-a2cd-52da95af146f&ssk=botmanager_support@radware.com&ssm=386502057861778427982231345774597228&ssn=f6e9c6efd6cb6abc040d455f91ad2e3c23d80900c3c4-8990-4f21-aaf3b2&sso=441b8f8c-bc564dd29dea10817f9dd400568ecee416db4964f05cb699&ssp=74148066261726510125172709639222824&ssq=86600009159933526358529239795016793148768&ssr=NTIuMy4yMTcuMjU0&sst=com.plumanalytics&ssu=&ssv=&ssw=&ssx=eyJfX3V6bWYiOiI3ZjYwMDBkNzYzNGE3Ni05ZTRkLTRjMmMtYjJhMC1mYzAzNGMyZjE1MjkxNzI2NTI5MjM5NDUzNTYyMzU5NjUyLTc3YWUyOGVhNDdlYTQ0YTA3OTgwNDYiLCJ1em14IjoiN2Y5MDAwMGMxZDc2YmItMzk2MS00N2VjLTlkZGItNjdmYTVhZTY2ODdlOC0xNzI2NTI5MjM5NDUzNTYyMzU5NjUyLTdjM2JlYmUxMjViYzMzMmE3OTc5NTkiLCJyZCI6ImlvcC5vcmcifQ==
American Astronomical Society
Provide Feedback
Have ideas for a new metric? Would you like to see something else here?Let us know