EMISSION LINES

Identifications

• Line No. 1. - Arp et al. (1967) give the wavelength as 3930 Å, while Burbidge (1967) gives 3919.8 Å. Arp et al. note that their measurement of the 3930 Å line was affected by the presence of the mercury night-sky line at 4046 Å. The better dispersion used by Burbidge (1967) as well as the tracings given in Bahcall et al. (1968; hereafter referred to as BGS) favouring Burbidge's value. We identify this line with C II 3919, 3920.7 Å (mult. 4) which is also known to occur in WR spectra and in nova like stars.
• Line No. 2. - There is a considerable spread in the reported wavelengths. Assuming that the one reported by Shaver et al. (1982) is closest to the correct value, the identification is with N II 3995 Å (mult. 12). The line occurs in Wolf-Rayet and novae spectra. It is of interest to compare the behaviour of 0237-233 and 0029+003 with respect to Line Nos. 1 and 2. In 0237-233, No. 1 occurs but No. 2 does not, while in 0029+003, the reverse is the case. Precisely this type of behaviour is expected from laser action in our theory (Varshni, 1975, 1979) for two quasars which lie at certain positions on the ne, Te diagram. The redshift hypothesis has no explanation for this behaviour.
• Line No. 3. - The recorded values for the wavelength are 4537 Å (Arp et al., 1967) and 4513 Å (Burbidge, 1967). As Burbidge used a better dispersion her value appears to be more accurate. We identify this line with C III 4516, 4517 Å (mult. 9). This line occurs with good strength in WC spectra. We would like to mention here another possibility also - N III 4511, 4515, 4518 Å (mult. 3). This line is often quite strong in WN spectra. A detailed study of the structure of the quasar line can help to decide which of the two is the correct identification.
• Line No. 4. - We identify this line with N II 4987, 4994 Å (mult. 24).
• Line No. 5. - It appears only as a weak line and its wavelength has considerable uncertainty. We identify this line with C III 5273, 5254 Å (mult. 4). This line appears in WC spectra.
• Line No. 6. - For this line also, there is considerable uncertainty in its wavelength, Arp et al. (1967) note that their measurement of 6141 Å was affected by the night-sky line at 6300 Å. We identify this line with C III 6154, 6155, 6157 Å (mult. 13). This line also appears in WC spectra.