Table 5: Predicted equivalent widths of emission and absorption lines, extinction coefficients and (V-I) colours from models of continuous star formation.
Age range^a modeled EW modeled (V-I)^d

Region young old b^b $M_{\rm y}$ / $M_{\rm o}$ H $\delta$ ^c H $\gamma$ ^c H $\beta$ ^c H $\alpha$ ^c C(H $\beta$ ) intrinsic reddened

$t_{\rm f}$ - $t_{\rm i}$ $t_{\rm f}$ - $t_{\rm i}$

MMT^e
a1 7.1-7.5 ... ... -6.3 -5.2 2.2 13.8 0.27 0.211 0.452

7.05-7.5 9.4-10 24 0.07 -6.0 -5.1 2.5 13.2 0.00 0.456 0.456

7.1-7.5 9.4-10 66 0.18 -6.2 -5.2 2.2 12.9 0.12 0.335 0.442

7.11-7.5 9.4-10 400 1.00 -6.2 -5.2 1.9 13.6 0.22 0.242 0.438

a2 7.1-8.2 ... ... -8.9 -7.9 0.6 3.4 0.10 0.350 0.439

7.1-8.2 8.2-9.3 100 8.1 -8.9 -7.9 0.7 3.8 0.10 0.358 0.447

7.1-7.6 8.9-9.3 19 0.5 -6.8^g -5.6 1.7 9.7^g 0.10 0.342 0.431

7.1-8.2 9.4-10 1000 19.7 -8.8 -7.9 0.7 3.9 0.10 0.352 0.441

7.1-8.2 8.2-9.3 7 0.6 -9.2 -7.9 0.5 2.7 0.00 0.440 0.440

7.1-7.6 8.9-9.3 9 0.2 -7.1^g -5.8 1.4 7.8^g 0.00 0.418 0.418

7.1-8.2 9.4-10 17 0.3 -8.6 -7.7 0.6 3.3 0.00 0.441 0.441

KPNO 4 m^f a3 6.7-8.4 ... ... -8.6 -7.6 6.6 36.8 0.10 0.355 0.444

6.7-8.8 ... ... -9.6^g -7.8 4.3 22.6^g 0.00 0.427 0.427

6.7-8.4 8.4-9.3 7 1.0 -8.9 -7.6 5.5 29.3 0.00 0.418 0.418

6.7-8.4 9.4-10 20 0.6 -8.4 -7.5 6.3 33.0 0.00 0.412 0.412

6.75-8.4 9.4-10 1000 32.5 -8.7 -7.6 5.4 30.5 0.12 0.361 0.468

a4 7.1-8.2 ... ... -8.9 -7.9 0.6 3.4 0.00 0.350 0.350

7.1-8.2 8.2-9.3 100 8.1 -8.9 -7.9 0.7 3.8 0.00 0.358 0.358

7.1-7.6 8.9-9.3 19 0.5 -6.8^g -5.6 1.7 9.7^g 0.00 0.342 0.342

7.1-8.2 9.4-10 1000 19.7 -8.8 -7.9 0.7 3.9 0.00 0.352 0.352

^a Duration of SF in log t (t in yr).

^b b $\equiv$ SFR(young)/SFR(old).

^c EW in Å.

$^{\rm d}$ Intrinsic colour is that for the stellar population in the absence of extinction. $(V-I)_{\rm reddened}$ = $(V-I)_{\rm intrinsic}$ + 0.891 C(H $\beta$ ).

^e Slit orientation with position angle ${\rm PA} = 22^\circ$ .

^f Slit orientation with position angle ${\rm PA} = 48^{\circ}$ .

^g EWs do not fit observations.

**Table 5:** Predicted equivalent widths of emission and absorption lines, extinction coefficients and (V-I) colours from models of continuous star formation.
		Age range^a			modeled EW		modeled (V-I)^d
	Region	young	old	b^b	$M_{\rm y}$ / $M_{\rm o}$	H $\delta$ ^c	H $\gamma$ ^c	H $\beta$ ^c	H $\alpha$ ^c	C(H $\beta$ )	intrinsic	reddened
		$t_{\rm f}$ - $t_{\rm i}$	$t_{\rm f}$ - $t_{\rm i}$
MMT^e	a1	7.1-7.5	...	...	-6.3	-5.2	2.2	13.8	0.27	0.211	0.452
		7.05-7.5	9.4-10	24	0.07	-6.0	-5.1	2.5	13.2	0.00	0.456	0.456
		7.1-7.5	9.4-10	66	0.18	-6.2	-5.2	2.2	12.9	0.12	0.335	0.442
		7.11-7.5	9.4-10	400	1.00	-6.2	-5.2	1.9	13.6	0.22	0.242	0.438
	a2	7.1-8.2	...	...	-8.9	-7.9	0.6	3.4	0.10	0.350	0.439
		7.1-8.2	8.2-9.3	100	8.1	-8.9	-7.9	0.7	3.8	0.10	0.358	0.447
		7.1-7.6	8.9-9.3	19	0.5	-6.8^g	-5.6	1.7	9.7^g	0.10	0.342	0.431
		7.1-8.2	9.4-10	1000	19.7	-8.8	-7.9	0.7	3.9	0.10	0.352	0.441
		7.1-8.2	8.2-9.3	7	0.6	-9.2	-7.9	0.5	2.7	0.00	0.440	0.440
		7.1-7.6	8.9-9.3	9	0.2	-7.1^g	-5.8	1.4	7.8^g	0.00	0.418	0.418
		7.1-8.2	9.4-10	17	0.3	-8.6	-7.7	0.6	3.3	0.00	0.441	0.441
KPNO 4 m^f	a3	6.7-8.4	...	...	-8.6	-7.6	6.6	36.8	0.10	0.355	0.444
		6.7-8.8	...	...	-9.6^g	-7.8	4.3	22.6^g	0.00	0.427	0.427
		6.7-8.4	8.4-9.3	7	1.0	-8.9	-7.6	5.5	29.3	0.00	0.418	0.418
		6.7-8.4	9.4-10	20	0.6	-8.4	-7.5	6.3	33.0	0.00	0.412	0.412
		6.75-8.4	9.4-10	1000	32.5	-8.7	-7.6	5.4	30.5	0.12	0.361	0.468
	a4	7.1-8.2	...	...	-8.9	-7.9	0.6	3.4	0.00	0.350	0.350
		7.1-8.2	8.2-9.3	100	8.1	-8.9	-7.9	0.7	3.8	0.00	0.358	0.358
		7.1-7.6	8.9-9.3	19	0.5	-6.8^g	-5.6	1.7	9.7^g	0.00	0.342	0.342
		7.1-8.2	9.4-10	1000	19.7	-8.8	-7.9	0.7	3.9	0.00	0.352	0.352

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