We present resolved-star VI photometry of the Local Group dwarf irregular galaxy IC1613 reaching I \sim 23.5 , obtained with the wide-field camera at the 2.5 m Isaac Newton Telescope .
A fit to the stellar density distribution shows an exponential profile of scale length 2 \farcm 9 \pm 0.1 and gives a central surface brightness \mu _ { V, 0 } = 22.7 \pm 0.6 .
The significant number of red giant branch ( RGB ) stars present in the outer part of our images ( r > 16 \farcm 5 ) indicates that the galaxy is actually more extended than previously estimated .
A comparison of the color-magnitude diagrams ( CMDs ) as a function of galactocentric distance shows a clear gradient in the age of its population , the scale length increasing with age , while we find no evidence of a metallicity gradient from the width of the RGB .
We present quantitative results of the recent star formation history from a synthetic CMD analysis using IAC-STAR .
We find a mean star formation rate of ( 1.6 \pm 0.8 ) \times 10 ^ { -3 } M _ { \sun } ~ { } yr ^ { -1 } ~ { } kpc ^ { -2 } in the central r \lesssim 2 \farcm 5 for the last 300 Myr .