35th Annual Report (2022-2023) - ENGLISH

177 Borgohain, Kanak Saha, Bruce Elmegreen, Rupjyoti Gogoi , Francoise Combes & Shyam N. Tandon, Nature, vo l ume 607 , pages 459–462 , published on 20July 2022. (iii) “Correlations between X-ray spectral parameters of Mkn 421 using long- term Swift–XRT data”, Rukaiya Khatoon, Zahir Shah, Jyotishree Hota, Ranjeev Misra, Rupjyoti Gogoi , Ananta C Pradhan , Monthly Notices of the Royal Astronomical Society, volume 515, issue 3, pages 3749–3759, published on 25 July 2022. (iv) “Simultaneous X-ray/UV Observations of Ultraluminous X-ray Source Holmberg II X-1 with Indian Space Mission Astrosat”, A. Vinokurov, K. Atapin, O. P. Bordoloi, A. Sarkisyan, U. Kashyap, M. Chakraborty, P. T. Rahna, A. Kostenkov, Y. Solovyeva, S. Fabrika, M. Safonova, R. Gogoi , F. Sutaria & J. Murthy, Astrophysical Bulletin, volume 77, pages 231–245, published on 30 September 2022. Image 1: School Outreach Programme at Fakharuddin Ali Ahmed High School. Image 2: IUCAA sponsored workshop at J.B. College, Jorhat Areasofresearch: ResearchworkdoneatICARD: Radio Astronomy, X-ray Astronomy Research scholar Mrs.Neha P. R, analysed the X-ray data of Mrk 335 from five swift XRT observations obtained from 2007 to 2009.The spectral studies show both spectral and flux variability of the source. She also studied the AGN Ark564, for which ninety-nine observations of X-ray data during the same period was consolidated. Coorelation graphs were plotted between different parametres obtained from the data analysis. Mrs. Aparna Raj, cross-matched the various radio catalogues available to identify the restarted radio sources in the sky. She used the spectral curvature technique for this and could find many hitherto unknown sources. Fifteen of the sources identified with peculiar radio properties have been Coordinator: Dr. Joe Jacob ICARD, Newman College, Thodupuzha, Kerala: Activities from 01 April 2022 till 31 March 2023 observedwithGMRT and further investigations are being done. Outreachprogrammes,includingpubliclectures/skywatcharrangedbyICARD. 1. SeminaronRadioAstronomyandDemonstrationofHornAntenna,June9,2022 A one-day workshop on 'Radio astronomy' and the demonstration of the Radio Horn antenna was conducted on 9th June 2022 in the Malekkudy Hall of the college. Ms. Vijayalakshmi V, an alumnus of the college was the resource person. The workshop which was co-ordinated by Dr. Joe Jacob and Dr. Subin Jose was arranged on the terrace of the Jubilee building, where the antenna is placed. Students and the public attended the programme fig 1: Ms.Vijayalakshmi V, explaining the working of the horn antenna