  HL CMa is a Z Cam-type dwarf nova which was discovered as an Einstein X-ray
source. In addition to normal outbursts and standstills, we noticed the
presence of "the third" outbursting state. During this period, the star showed
weak outbursts with a long outburst cycle length. We propose that this
phenomenon is caused by a heating on the accretion disk. The presence of strong
P Cyg feature in the ultraviolet and the unusual presence of high-excitation
optical lines could be interpreted as an emerging signature of strong
irradiation field. Since the object is still in this unusual state in 2002
March, we encourage X-ray and spectroscopic observations to detect further
signatures of high-energy photons and irradiation.
