Taurus Hill Observatory research team observed Qatar-1b at Taurus Hill Observatory 29./30.3.2011. The duration of the transit was according the measurements 102.5 minutes and the dimmening of the mother star 23.5 mmag. The observation has been published in TRESCA database.
http://var2.astro.cz/EN/tresca/transit-detail.php?id=1301456454