Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Articles Article Faculty Publications -Articles Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Search for low-mass objects in the globular cluster M4. I. Detection of variable stars Subject The topic of the resource globular clusters: general; globular clusters: individual (M4); gravitational lensing: micro; stars: variables: general Description An account of the resource With every new discovery of an extrasolar planet, the absence of planets in globular clusters (GCs) becomes more and more conspicuous. Null detection of transiting hot Jupiters in GCs 47 Tuc, ? Cen, and NGC 6397 presents an important puzzle, raising questions about the role played by cluster metallicity and environment on formation and survival of planetary systems in densely populated stellar clusters. GCs were postulated to have many free-floating planets, for which microlensing (ML) is an established tool for detection. Dense environments, well-constrained distances and kinematics of lenses and sources, and photometry of thousands of stars simultaneously make GCs the ideal targets to search for ML. We present first results of a multisite, 69-night-long campaign to search for ML signatures of low-mass objects in the GC M4, which was chosen because of its proximity, location, and the actual existence of a planet. M4 was observed in R and I bands by two telescopes, 1 m T40 and 18-inch C18, of the Wise Observatory, Tel Aviv, Israel, from 2011 April to July. Observations on the 1 m telescope were carried out in service mode, gathering 12 to 48 20 s exposures per night for a total of 69 nights. C18 observations were done for about 4 hr a night for six nights in 2011 May. We employ a semiautomated pipeline to calibrate and reduce the images to the light curves that our group is developing for this purpose, which includes the differential photometry package DIAPL, written by Wozniak and modified by W. Pych. Several different diagnostics are employed for search of variability/transients. While no high-significance ML event was found in this observational run, we have detected more than 20 new variables and variable candidates in the M4 field, which we present here. 2016. The American Astronomical Society. All rights reserved. Creator An entity primarily responsible for making the resource Safonova M.; Mkrtichian D.; Hasan P.; Sutaria F.; Brosch N.; Gorbikov E.; Joseph P. Source A related resource from which the described resource is derived Astronomical Journal, Vol-151, No. 2 Publisher An entity responsible for making the resource available Institute of Physics Publishing Date A point or period of time associated with an event in the lifecycle of the resource 2016-01-01 Identifier An unambiguous reference to the resource within a given context <a href="https://doi.org/10.3847/0004-6256/151/2/27" target="_blank" rel="noreferrer noopener">https://doi.org/10.3847/0004-6256/151/2/27</a> <br /><br /><a href="https://www.scopus.com/inward/record.uri?eid=2-s2.0-84957952014&amp;doi=10.3847%2F0004-6256%2F151%2F2%2F27&amp;partnerID=40&amp;md5=7f6d21c9c8e78a6f4970b43a4fed2712" target="_blank" rel="noreferrer noopener">https://www.scopus.com/inward/record.uri?eid=2-s2.0-84957952014&amp;doi=10.3847%2f0004-6256%2f151%2f2%2f27&amp;partnerID=40&amp;md5=7f6d21c9c8e78a6f4970b43a4fed2712</a> Rights Information about rights held in and over the resource All Open Access; Bronze Open Access Relation A related resource ISSN: 46256 Format The file format, physical medium, or dimensions of the resource Online Language A language of the resource English Type The nature or genre of the resource Article Coverage The spatial or temporal topic of the resource, the spatial applicability of the resource, or the jurisdiction under which the resource is relevant Safonova M., Indian Institute of Astrophysics, Koramangala 2nd Block, Bangalore, 560034, India; Mkrtichian D., National Astronomical Research Institute of Thailand (NARIT), 191 Siriphanich Building, Huaykaew Road, Suthep, Muang Chiang Mai, 50200, Thailand; Hasan P., Department of Physics, Maulana Azad National Urdu University (MANUU), Hyderabad, 500034, India; Sutaria F., Indian Institute of Astrophysics, Koramangala 2nd Block, Bangalore, 560034, India; Brosch N., Department of Astronomy and Astrophysics and the Wise Observatory, Tel Aviv University, Tel Aviv, 69978, Israel; Gorbikov E., Department of Astronomy and Astrophysics and the Wise Observatory, Tel Aviv University, Tel Aviv, 69978, Israel; Joseph P., Department of Physics, Christ University, Hosur Road, Bangalore, 560029, India