removed try except in read

        >>> print("instrument: ", data.get_l0keyword("pri", "INSTRUME"))

        >>> print("object: ", data.get_l0keyword("pri", "OBJECT"))

        """

        try:

        with fits.open(fp) as hdulist:

            instrument = hdulist[0].header.get('INSTRUME')  # strip or not?

            detector = hdulist[0].header.get('DETECTOR')  # strip or not?

                hdu1 = hdulist[1].copy()

                data = CsstMscImgData(hdu0, hdu1, instrument=instrument, detector=detector)

                return data

        except Exception as e:

            print(e)