Its's cover Astronomy, Astrophysics, Solar Physics. http://localhost:8080/xmlui/handle/123456789/1174 2026-04-21T09:57:17Z 2026-04-21T09:57:17Z Parmar, Avni http://localhost:8080/xmlui/handle/123456789/1212 2015-08-19T06:30:12Z 2015-01-01T00:00:00Z

Physical state of 21-cm absorber at Zabs ∼ 0.3 towards a radio-loud abs quasar J1443+0214 Parmar, Avni Understanding the physical state of the interstellar medium of protogalaxy at high red- shift plays a key role in our understanding of galaxy formation. Although it is not possible to directly observe the highly redshifted galaxies, but their signature as absorp- tion line in the background quasar spectrum allow us to study them in both optical and radio regions. In this regard we study the quasar-galaxy pair (QGP) J1443+0214 with zqso =1.82, zabs = 0.3714. The foreground galaxy in this QGP is identified by the detec- tion of emission lines in the SDSS spectrum of QSO. The foreground galaxy is invisible otherwise. The QGP J1443+0214 was observed on 2012 June 2 (5.7h on source) with Giant Me- terwave Radio Telescope (GMRT) using a baseband bandwidth of 4.17 MHz split into 512 spectral channels centered on the redshifted 21-cm frequency of foreground galaxy. We reduce the data using Astronomical Image Processing System (AIPS) to obtain HI 21-cm absorption line. This reduction process consists of steps like loading the data into AIPS, editing and flagging the bad data, calibrating it through various steps of gain calibration, bandpass calibration and finally the self calibration. Further, we fit Gaussian components to the continuum and absorption line profile separately; then divide the continuum from multi-channel source data using Interactive Data Language (IDL). We estimate parameters like optical depth and spin temperature from this spectrum obtained.

2015-01-01T00:00:00Z Lohani, Anjali http://localhost:8080/xmlui/handle/123456789/1195 2015-08-05T05:49:44Z 2015-01-01T00:00:00Z

Instrumentation: CCD and Telescope Lohani, Anjali The aim of this project was to gain a first hand knowledge of instruments such as CCD and telescope being used in current astronomy. In this project, I have learnt the basic properties of telescope along with a hands on practice with CCD data. Project has done under the supervision of Dr. B. J. Mehdi

2015-01-01T00:00:00Z Bhatt, Sunita http://localhost:8080/xmlui/handle/123456789/1190 2015-08-04T09:34:59Z 2015-01-01T00:00:00Z

Study of Milky Way galaxy using open star cluster Bhatt, Sunita In this project, our main aim is to study the structure of Milky Way galaxy with the help of open clusters. We selected 1850 open star clusters from the catalogue of Dias et al. (2002). The fundamental parameters like age, distance, reddening , longitude, latitude and metallicity are also acquired from the same catalogue. We also studied the variation of different parameters of the clusters with Galactic parameters in different quadrants of the Galaxy. Our analysis show that most of the open clusters located along the spiral arms of our Galaxy. Project under supervision of Dr. R.K.S. Yadav

2015-01-01T00:00:00Z Anisha http://localhost:8080/xmlui/handle/123456789/1189 2015-08-04T09:17:49Z 2015-01-01T00:00:00Z

Image quality of 3.6m optical telescope Anisha The 3.6m optical telescope is being installed at Devasthal, Nainital, and it will provide seeing limited observational capabilities at visible and near infrared bands. The image quality of any optical telescope is very crucial to determine accurate physical properties of celestial objects and it can go bad due to variety of reasons and it can go bad due to variety of reasons such as poor alignment of optics and the environment of telescope.

2015-01-01T00:00:00Z