Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/8237
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dc.contributor.authorSharma, Kritti-
dc.contributor.authorKumar, Harsh-
dc.contributor.authorChoudhary, Harsh-
dc.contributor.authorBhalerao, Varun-
dc.contributor.authorSwain, Vishwajeet-
dc.contributor.authorBolin, Bryce-
dc.contributor.authorAnupama, G. C-
dc.contributor.authorBarway, Sudhanshu-
dc.contributor.authorJoharle, Simran-
dc.contributor.authorShenoy, Vedant-
dc.date.accessioned2023-08-18T06:00:53Z-
dc.date.available2023-08-18T06:00:53Z-
dc.date.issued2023-09-
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, Vol. 524, No. 2, pp. 2651–2660en_US
dc.identifier.issn1365-2966-
dc.identifier.urihttp://hdl.handle.net/2248/8237-
dc.descriptionRestricted Accessen_US
dc.description.abstractThe detection and accurate astrometry of fast-moving near-Earth objects (NEOs) has been a challenge for the follow-up community. Their fast apparent motion results in streaks in sidereal images, thus affecting the telescope’s limiting magnitude and astrometric accuracy. A widely adopted technique to mitigate trailing losses is non-sidereal tracking, which transfers the streaking to background reference stars. However, no existing publicly available astrometry software is configured to detect such elongated stars. We present Astreaks, a streaking source detection algorithm, to obtain accurate astrometry of NEOs in non-sidereal data. We validate the astrometric accuracy of Astreaks on 371 non-sidereally tracked images for 115 NEOs with two instrument set-ups of the GROWTH-India Telescope. The observed NEOs had V-band magnitude in the range [15, 22] with proper motion up to 140 arcsec min−1, thus resulting in stellar streaks as high as 6.5 arcmin (582 pixels) in our data. Our method obtained astrometric solutions for all images with 100 per cent success rate. The standard deviation in observed-minus-computed (O–C) residuals is 0.52 arcsec with O–C residuals <2 arcsec (<1 arcsec) for 98.4 per cent (84.4 per cent) of our measurements. These are appreciable, given the pixel scale of ∼0.3 and ∼0.7 arcsec of our two instrument set-ups. This demonstrates that our modular and fully automated algorithm helps improve the telescope system’s limiting magnitude without compromising astrometric accuracy by enabling non-sidereal tracking on the target. This will help the NEO follow-up community cope with the accelerated discovery rates and improved sensitivity of the next-generation NEO surveys. Astreaks has been made available to the community under an open-source license.en_US
dc.language.isoenen_US
dc.publisherOxford University Press on behalf of Royal Astronomical Societyen_US
dc.relation.urihttps://doi.org/10.1093/mnras/stad1989-
dc.rights© Royal Astronomical Society-
dc.subjectTechniques: image processingen_US
dc.subjectSoftware: data analysisen_US
dc.subjectAstrometry and celestial mechanics: astrometryen_US
dc.subjectPlanets and satellites: detectionen_US
dc.titleAstreaks: astrometry of NEOs with trailed background starsen_US
dc.typeArticleen_US
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