The Inter-University Centre for Astronomy and Astrophysics (IUCAA) is an autonomous institution set up by the University Grants Commission (UGC) of India to promote the nucleation and growth of active groups in astronomy and astrophysics at Indian universities. It was established in 1988 at Pune, India. IUCAA aims to be a centre of excellence within the university sector for teaching, research and development in astronomy and astrophysics. To highlight IUCAA Associates program and associates output during their tenure as an associate, we decided to study its academic scientific output of IUCAA Associates during 2003-2013. This paper is an Informetric analysis of 1009 papers published by IUCAA associates from 2003 to 2013, downloaded from the institute’s website, annual reports and ADS. There is no doubt that collaboration is a common phenomenon in research. This paper examined the collaborative strength and patterns of authorship among IUCAA associates, covering a period of 10 years. The results of the data were analyzed based on the number of articles published per year, pattern of authorship and the collaborative degree and strength of authors. The study shows that majority of the associates preferred to publish research papers in joint authorship. Out of 1009 articles, 950 (93.32%) are joint works while only 68 (6.68%) are single authored works. The degree of author’s collaboration was also calculated to be 0.93, while the mean numbers of single authored and joint authored article are 6.68 and 93.32 respectively. Further, the study investigated highly prolific authors and highly preferred journals by the IUCAA associates during the study period.