Mrinal Kumar Das Gupta FNI (1 September 1923 – 28 November 2005,

Kolkata Kolkata (, or , ; also known as Calcutta , List of renamed places in India#West Bengal, the official name until 2001) is the Capital city, capital of the Indian States and union territories of India, state of West Bengal, on the eastern ba ...

) was an Indian

astronomer An astronomer is a scientist in the field of astronomy who focuses their studies on a specific question or field outside the scope of Earth. They observe astronomical objects such as stars, planets, moons, comets and galaxies – in either o ...

. He was born in erstwhile Barishal district in present-day

Bangladesh Bangladesh (}, ), officially the People's Republic of Bangladesh, is a country in South Asia. It is the List of countries and dependencies by population, eighth-most populous country in the world, with a population exceeding 165 million pe ...

. He received his B.Sc and M.Sc degrees in Physics from

Dhaka University The University of Dhaka (also known as Dhaka University, or DU) is a public research university located in Dhaka, Bangladesh. It is the oldest university in Bangladesh. The university opened its doors to students on July 1st 1921. Currently it ...

in 1944 and 1945 respectively. Later he joined the department of Radio Physics and Electronics of the

University of Calcutta The University of Calcutta (informally known as Calcutta University; CU) is a public collegiate state university in India, located in Kolkata, West Bengal, India. Considered one of best state research university all over India every year, C ...

as a researcher. In 1954, he obtained his Ph.D. from the

University of Manchester The University of Manchester is a public university, public research university in Manchester, England. The main campus is south of Manchester city centre, Manchester City Centre on Wilmslow Road, Oxford Road. The university owns and operates majo ...

. Later he became the head of the department of the Institute of Radio Physics and Electronics at

Calcutta University The University of Calcutta (informally known as Calcutta University; CU) is a public collegiate state university in India, located in Kolkata, West Bengal, India. Considered one of best state research university all over India every year, C ...

. Das Gupta worked with

Robert Hanbury Brown Robert Hanbury Brown, AC FRS (31 August 1916 – 16 January 2002) was a British astronomer and physicist born in Aruvankadu, India. He made notable contributions to the development of radar and later conducted pioneering work in the field of ...

and Roger Jennison, in building the first

intensity interferometer An intensity interferometer is the name given to devices that use the Hanbury Brown and Twiss effect. In astronomy, the most common use of such an astronomical interferometer is to determine the apparent angular diameter of a radio source or star ...

s at radio wavelength in the early 1950s and measured the apparent angular structures of two radio sources,

Cygnus A Cygnus A ( 3C 405) is a radio galaxy, and one of the strongest radio sources in the sky. A concentrated radio source in Cygnus was discovered by Grote Reber in 1939. In 1946 Stanley Hey and his colleague James Phillips identified that the source ...

and

Cassiopeia A Cassiopeia A (Cas A) () is a supernova remnant (SNR) in the constellation Cassiopeia and the brightest extrasolar radio source in the sky at frequencies above 1 GHz. The supernova occurred approximately away within the Milky Way ...

. Das Gupta was elected as a ''Fellow of the National Academy of Science'' in 1974 by the

Indian National Science Academy The Indian National Science Academy (INSA) is a national academy in New Delhi New Delhi (, , ''Naī Dillī'') is the Capital city, capital of India and a part of the NCT Delhi, National Capital Territory of Delhi (NCT). New Delhi is t ...

, New Delhi and as a ''Fellow of the Academy of Science'' by the

Indian Academy of Sciences The Indian Academy of Sciences, Bangalore was founded by Indian Physicist and Nobel Laureate C. V. Raman, and was registered as a society on 24 April 1934. Inaugurated on 31 July 1934, it began with 65 founding fellows. The first general mee ...

, Bangalore. He was also the member of the now-infamous committee that investigated Dr. Subhash Mukhopadhyay who created the world's second and India's first child using

in-vitro fertilisation In vitro fertilisation (IVF) is a process of fertilisation where an egg is combined with sperm in vitro ("in glass"). The process involves monitoring and stimulating an individual's ovulatory process, removing an ovum or ova (egg or eggs) f ...

. He died on 28 November 2005 in Kolkata.History
Institute of Radio Physics & Electronics, University of Calcutta website

Notes

1923 births 2005 deaths 20th-century Indian astronomers Academic staff of the University of Calcutta {{astronomer-stub