[MPC2001] 108 , the SIMBAD biblio

A 34'x34' field centred on the spiral galaxy M 81 has been searched for emission-line objects using the prime focus wide field camera (WFC) of the 2.54m Isaac Newton Telescope (La Palma, Spain). A total of 171 candidate planetary nebulae (PNe) are found, 54 of which are in common with the ones detected by Jacoby et al. (1989ApJ...344..704J). The behaviour of PNe excitation as a function of galactocentric distance is examined, and no significant variations are found. The PNe luminosity function is built for the disk and bulge of M 81, separately. A distance modulus of 27.92±0.23mag is found for disk PNe, in good agreement with previous distance measurements for M 81 (Jacoby et al., 1989ApJ...344..704J; Huterer et al., 1995AJ....110.2705H).