BATSE GAMMA-RAY BURST LINE SEARCH .3. LINE DETECTABILITY

We evaluate the ability of the BATSE spectroscopy detectors to detect the absorption lines observed by Ginga in gamma-ray burst spectra. We find that BATSE can detect the 20.6 keV line in the S1 segment of GB 8 70303 with a detection probability of similar to 1/4 in nearly normal incident bursts, with the probability dropping off to nearly 0 at a bu rst angle of 50 degrees; the lines at 19.4 and 38.8 keV in GB 880205 h ave a high detection probability in BATSE up to burst angles of 75 deg rees In addition, we calculate detection probabilities for these two l ine types as a function of signal-to-noise ratio and burst angle for u se in detailed comparisons between BATSE and Ginga. Finally, we consid er the probability averaged over the sky of detecting a line feature w ith the actual array of BATSE detectors on CGRO.