the Extensive Database of Astrophysical Maser Sources

Abstract
A sample of 17 Miras and nine semiregular variable stars was simultaneously observed in the OH and H_2O maser lines with sensitivities of 0.15 and 0.6 Jy, respectively. One new H_2O source was detected. Among Miras the H_2O maser luminosity is well correlated with the OH maser luminosity. The ratio of H_2O to OH maser luminosities decreases by about four orders of magnitude from the semiregulars to the Miras as a result of an increase in the mass-loss rate. Some semiregulars have maser properties typical of Mira stars. H_2O emission is most likely to be detected from Miras at velocities close to the stellar velocity, while emission at blueshifted velocities dominates the detections from semiregulars. OH emission from the semiregulars usually occurs at greater redshifts and blueshifts with respect to the stellar velocities than OH emission observed from the Miras. The differences in the average composite maser profiles in both groups of stars can be related to the velocity gradients in the maser regions. It is suggested that some semiregular variables with maser emission may be in a later stage of stellar evolution than the Miras.	Comments: Velocity resolution: 0.28 km/s Upper limit for non-detections: <0.3 Jy (3σ) Data not given in Table 1 was provided by M. Szymzcak.

ID	Obs. RA	Obs. Dec	l	b	Source name	Spectra	Frequency	V_low	V_up	V_peak	V_peak(2)	F_peak	F_peak(2)	List	Ref.
	(J2000)	(J2000)	(deg.)	(deg.)			(MHz)	(km/s)	(km/s)	(km/s)	(km/s)	(Jy)	(Jy)
1	23 58 24.9	+51 23 19.7	114.56084	-10.619074	R Cas		1667	21.1	31.5	21.1	31.5	0.700	0.76	ENG15	SZY99
2	23 58 24.9	+51 23 19.7	114.56084	-10.619074	R Cas		1665	23.1	29.8	23.1	29.8	0.520	0.56	ENG15	SZY99
3	02 44 45.5	+12 19 03	161.473537	-41.919417	RU Ari		1612	16.2	24.1	16.2	24.1	0.560	1.52	ENG15	SZY99
4	02 44 45.5	+12 19 03	161.473537	-41.919417	RU Ari		1667	23.6	24.8	23.6	24.8	0.610	0.57	ENG15	SZY99
5	02 44 45.5	+12 19 03	161.473537	-41.919417	RU Ari		1665	17.5	23.7	17.5	23.7	0.094	0.33	ENG15	SZY99
6	00 03 21.3	+55 40 50	116.144009	-6.556206	Y Cas	Spectra	1667	-22.2	-12.1	-22.2	-12.1	0.420	0.39	ENG15	SZY99
7	00 03 21.3	+55 40 50	116.144009	-6.556206	Y Cas		1665	-21.9	-12.4	-21.9	-12.4	0.480	0.25	ENG15	SZY99
8	00 46 0.1	+69 10 53.4	122.446016	6.31488	V524 Cas		1612	-34.8	-16.5	-34.8	-16.5	1.280	0.56	ENG15	SZY99
9	00 46 0.1	+69 10 53.4	122.446016	6.31488	V524 Cas		1667	-24.5		-24.5		0.120		ENG15	SZY99
10	00 46 0.1	+69 10 53.4	122.446016	6.31488	V524 Cas		1665	-28.1	-24.5	-28.1	-24.5	0.080	0.14	ENG15	SZY99
11	10 53 37.4	+13 42 54.3	233.021992	59.426355	W Leo		1667	41.8	51.1	41.8	51.1	0.210	0.25	ENG15	SZY99
12	10 53 37.4	+13 42 54.3	233.021992	59.426355	W Leo		1665	50.6	51.7	50.6	51.7	0.200	0.16	ENG15	SZY99
13	16 25 47.5	+18 53 32.9	35.34514	40.350862	U Her		1612	-18.5	-9.0	-18.5	-9.0	2.480	0.59	ENG15	SZY99
14	16 25 47.5	+18 53 32.9	35.34514	40.350862	U Her		1667	-18.7	-9.2	-18.7	-9.2	5.160	1.78	ENG15	SZY99
15	16 25 47.5	+18 53 32.9	35.34514	40.350862	U Her		1665	-18.8	-17.9	-18.8	-17.9	4.150	4.56	ENG15	SZY99
16	05 55 49.2	+20 10 30.7	188.715149	-2.492122	U Ori		1667	-41.5	-41.1	-41.5	-41.1	1.630	1.31	ENG15	SZY99
17	05 55 49.2	+20 10 30.7	188.715149	-2.492122	U Ori		1665	-41.6	-40.4	-41.6	-40.4	2.210	1.29	ENG15	SZY99
18	04 28 18	+10 09 44.8	185.217432	-25.581329	R Tau		1667	14.4		14.4		0.260		ENG15	SZY99
19	04 28 18	+10 09 44.8	185.217432	-25.581329	R Tau		1665	14.7		14.7		0.180		ENG15	SZY99
20	15 21 39.5	+14 18 53.1	20.498175	52.786522	S Ser		1667	25.2		25.2		0.310		ENG15	SZY99
21	15 21 39.5	+14 18 53.1	20.498175	52.786522	S Ser		1665	19.3	25.5	19.3	25.5	0.140	0.1	ENG15	SZY99
22	06 37 31.3	-01 23 43.6	212.588003	-3.732456	SY Mon		1667	-58.4	-52.2	-58.4	-52.2	0.180	0.33	ENG15	SZY99
23	06 37 31.3	-01 23 43.6	212.588003	-3.732456	SY Mon		1665	-55.3	-52.2	-55.3	-52.2	0.190	0.31	ENG15	SZY99
24	22 12 16.2	+14 33 12.2	75.18579	-33.183332	RS Peg		1667	-20.3		-20.3		0.240		ENG15	SZY99
25	22 12 16.2	+14 33 12.2	75.18579	-33.183332	RS Peg		1665	-20.0		-20.0		0.480		ENG15	SZY99
26	14 27 16.4	+04 40 41.1	352.674077	57.971458	RS Vir		1612	-18.4	-10.2	-18.4	-10.2	1.950	4.89	ENG15	SZY99
27	14 27 16.4	+04 40 41.1	352.674077	57.971458	RS Vir		1667	-17.4	-10.3	-17.4	-10.3	0.660	1.26	ENG15	SZY99
28	14 27 16.4	+04 40 41.1	352.674077	57.971458	RS Vir		1665	-17.9		-17.9		0.910		ENG15	SZY99
29	09 47 33.5	+11 25 43.6	223.720739	44.159756	R Leo		1665	-1.5	4.1	-1.5	4.1	0.090	0.16	ENG15	SZY99
30	09 45 34.3	+34 30 42.8	190.595441	49.771065	R LMi		1612	-3.9		-3.9		0.320		ENG15	SZY99
31	09 45 34.3	+34 30 42.8	190.595441	49.771065	R LMi		1667	-3.4	5.1	-3.4	5.1	0.360	0.34	ENG15	SZY99
32	09 45 34.3	+34 30 42.8	190.595441	49.771065	R LMi		1665	-4.1	5.2	-4.1	5.2	0.970	0.19	ENG15	SZY99
33	13 19 27.8	+45 31 37.7	107.891341	70.773905	V CVn		1667	6.7		6.7		0.190		ENG15	SZY99
34	13 02 38	+05 11 8.4	310.357095	67.895867	RT Vir		1665	13.6	23.6	13.6	23.6	0.630	2.23	ENG15	SZY99
35	13 02 38	+05 11 8.4	310.357095	67.895867	RT Vir		1667	10.7	24.2	10.7	24.2	3.840	2.64	ENG15	SZY99
36	07 55 40.2	-28 38 54.8	245.437491	-0.147547	HU Pup		1665	34.6	35.4	34.6	35.4	0.300	0.22	ENG15	SZY99
37	07 55 40.2	-28 38 54.8	245.437491	-0.147547	HU Pup		1667	33.2	34.3	33.2	34.3	0.520	0.51	ENG15	SZY99
38	11 00 33.9	-18 19 29.6	269.269544	37.195766	R Crt		1665	1.7	2.7	1.7	2.7	1.080	0.52	ENG15	SZY99
39	11 00 33.9	-18 19 29.6	269.269544	37.195766	R Crt		1667	1.7	2.8	1.7	2.8	3.240	1	ENG15	SZY99

IRAS source	IRAS coordinates (RA, Dec)	IRAS flux density (F12,F25,F60,F100)
2MASS source	2MASS coordinates (RA, Dec)	2MASS magnituted (J,H,K)

Variable star	Variable star parameters	Star Formation Region name	Star Formation Region parameters
WISE source	WISE coordinates (RA, Dec)	WISE magnitudes (w1, w2, w3, w4)
Akari IRC source	Akari IRC coordinates (RA, Dec)	Akari IRC fluxes (S09, S18)
Akari FIS source	Akari FIS coordinates (RA, Dec)	Akari FIS fluxes (S65, S90, S140, S160)

DSS (optical)	2MASS (JHK)	WISE (4-22 um)	IRAC (3-8 um)	GLIMPSE 360 (3.6-4.5 um)	PACS color (70-160 um)	SPIRE color (250-500 um)
AKARI color (60-160 um)	NVSS (1.4 GHz)	SDSS (optical+NIR)	Image size: arcsec (default is 120 arcsec)
			Image size: arcsec (default is 120 arcsec)

Display data from paper

SZY99 - A comparison of OH and H_2O maser properties of Mira and semiregular variable stars

Interferometry data

View paper statistics

Detection table from Szymczak & Le Squeren (1999)

Non-detection table from Szymczak & Le Squeren (1999)