NGC 300 ULX-1 is a newly identified ULX pulsar. The system has shown a extraordinary spin up rate within the last year, when it spun-up from 31 sec to 20 sec. We request 2x10 ks chandra observations separated by 2-4 days in order to accurately measure the spin up rate of the pulsar.
Department of Physics National and Kapodistrian University of Athens University Campus GR-157 84 Zografou, Athens Tel: (+30) 210-7276825 email: gevas@phys.uoa.gr