  The concept of a "magnetar" was proposed mainly because of two factors.
First, the X-ray luminosity of Anomalous X-ray Pulsars (AXPs) and Soft
Gamma-Ray Repeaters (SGRs) is larger than the rotational energy loss rate, and
second, the magnetic field strength calculated from "normal method" is super
strong. It is proposed that the radiation energy of magnetar comes from its
magnetic fields. Here it is argued that the magnetic field strength calculated
through the normal method is incorrect when X-ray luminosity is larger than
rotational energy loss rate, because the wind braking is not taken into
account. Besides, the "anti-magnetar" and some other X-ray and radio
observations are difficult to understand with a magnetar model. Instead of the
magnetar, we propose a "quarctar", which is a crusted quark star in an
accretion disk, to explain the observations. In this model, the persistent
X-ray emission, burst luminosity, spectrum of AXPs and SGRs can be understood
naturally. The radio-emitting AXPs, which are challenging the magnetar, can
also be explained by the quarctar model.
