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SAR08 - VLBA Observations of the Zeeman Effect in H₂O Masers in OH 43.8-0.1

Interferometry data

Short title: Sarma et al. (2008)
Authors: Sarma, A. P.Troland, T. H.Romney, J. D.Huynh, T. H.
Journal: The Astrophysical Journal, Volume 674, Issue 1, pp. 295-303 (2008).
Bibcode:

Target type: High_mass_SFR
Transitions: H2O_22

Abstract
We present VLBA observations of the Zeeman effect in H2O masers in the high-mass star-forming region OH 43.8-0.1, where we observed 116 maser features. These masers may be arranged in several groups: the most prominent are an arc-shaped structure to the north, a central cluster, two groups located symmetrically around the central cluster to its northeast and southwest, and a group in the extreme south. The highest velocity (redshifted) masers are in the center of the northern arc. The observed morphology of masers in OH 43.8-0.1 suggests a stellar object (or objects) located within the central cluster of masers, driving outflows to the north and south the redshifted and blueshifted group in the northern arc may represent the leading edge of two or more such outflows. The two groups located symmetrically around the central cluster may suggest a circumstellar disk of diameter 3000 AU. Seven masers in OH 43.8-0.1 are above our Zeeman detection limit. We detected magnetic fields in the range 10-20 mG in four of these masers and imposed sensitive upper limits on the other three. Three detections are for masers in the northern arc the fourth is in the central cluster. We find no significant difference between the magnetic field strengths in these two groups. In the northern arc we detect a magnetic field reversal over a scale as small as 170 AU. We use our Zeeman-effect results to examine connections between the pre- and postshock magnetic fields and densities. The predicted preshock magnetic field strength and density are consistent with the fields and densities observed in typical preshock regions. The predicted postshock density also appears to be in the regime for optimal H2O maser pumping. Finally, we find that the magnetic and kinetic energy densities are likely in equilibrium in both pre- and postshock regions, meaning that the magnetic field must affect significantly the outflow dynamics.

Abstract

We present VLBA observations of the Zeeman effect in H2O masers in the high-mass star-forming region OH 43.8-0.1, where we observed 116 maser features. These masers may be arranged in several groups: the most prominent are an arc-shaped structure to the north, a central cluster, two groups located symmetrically around the central cluster to its northeast and southwest, and a group in the extreme south. The highest velocity (redshifted) masers are in the center of the northern arc. The observed morphology of masers in OH 43.8-0.1 suggests a stellar object (or objects) located within the central cluster of masers, driving outflows to the north and south the redshifted and blueshifted group in the northern arc may represent the leading edge of two or more such outflows. The two groups located symmetrically around the central cluster may suggest a circumstellar disk of diameter 3000 AU. Seven masers in OH 43.8-0.1 are above our Zeeman detection limit. We detected magnetic fields in the range 10-20 mG in four of these masers and imposed sensitive upper limits on the other three. Three detections are for masers in the northern arc the fourth is in the central cluster. We find no significant difference between the magnetic field strengths in these two groups. In the northern arc we detect a magnetic field reversal over a scale as small as 170 AU. We use our Zeeman-effect results to examine connections between the pre- and postshock magnetic fields and densities. The predicted preshock magnetic field strength and density are consistent with the fields and densities observed in typical preshock regions. The predicted postshock density also appears to be in the regime for optimal H2O maser pumping. Finally, we find that the magnetic and kinetic energy densities are likely in equilibrium in both pre- and postshock regions, meaning that the magnetic field must affect significantly the outflow dynamics.

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ID	Obs. RA	Obs. Dec	RA offset	Dec offset	l	b	Group id	#	Source name	Image	Descr.	Line	V_peak	F_peak	Telescope	V_step	RMS	Beam	Detection	Class	Dist. (parallax)	Date
	(J2000)	(J2000)	(mas)	(mas)	(deg.)	(deg.)						H₂O	(km/s)	(Jy)		(km/s)	(mJy)	(arcsec)	Yes/No		(kpc)
1	+19 11 54.08	+09 35 50.29			43.79556	-0.127581	G43.795-0.127		OH 43.8-0.1	Image	Descr	22 GHz;			VLBA	0.11	12.000	0.00097 x 0.00053	+H₂O +CH₃OH I +CH₃OH II +OH	SFR		2002 July 1
	+19 11 54.0799	+09 35 50.2908	0 mas	0 mas	43.795560	-0.127581		1	OH 43.8-0.1				38.89	232.1 +- 1.1
	+19 11 54.0766	+09 35 50.336	-49.8 mas	45.2 mas	43.795565	-0.127563		2	OH 43.8-0.1				39.18	157.6 +- 0.2
	+19 11 54.0741	+09 35 49.9966	-87.8 mas	-294.2 mas	43.795477	-0.127597		3	OH 43.8-0.1				40.17	141.2 +- 0.9
	+19 11 54.0798	+09 35 50.2983	-1.8 mas	7.5 mas	43.795562	-0.127579		4	OH 43.8-0.1				38.9	116.4 +- 0.8
	+19 11 54.0886	+09 35 49.4828	129.9 mas	-808 mas	43.795378	-0.127716		5	OH 43.8-0.1				41.01	62.4 +- 0.2
	+19 11 54.08	+09 35 50.2917	1.5 mas	0.9 mas	43.795561	-0.127581		6	OH 43.8-0.1				38.68	49.6 +- 0.2
	+19 11 54.0682	+09 35 50.414	-175.9 mas	123.2 mas	43.795568	-0.127522		7	OH 43.8-0.1				41.18	40.3 +- 0.2
	+19 11 54.0619	+09 35 50.2434	-270 mas	-47.4 mas	43.795514	-0.127521		8	OH 43.8-0.1				41.41	37.4 +- 0.1
	+19 11 54.0697	+09 35 50.4253	-154 mas	134.5 mas	43.795574	-0.127526		9	OH 43.8-0.1				43.85	34.7 +- 0.3
	+19 11 54.0657	+09 35 50.3982	-213.6 mas	107.4 mas	43.795560	-0.127515		10	OH 43.8-0.1				40.69	21.9 +- 0.2
	+19 11 54.0765	+09 35 50.0418	-50.7 mas	-249 mas	43.795493	-0.127601		11	OH 43.8-0.1				35.42	21.6 +- 0.1
	+19 11 54.1066	+09 35 50.186	399.8 mas	-104.8 mas	43.795585	-0.127691		12	OH 43.8-0.1				40.17	17.7 +- 0.1
	+19 11 54.0678	+09 35 50.4347	-181.8 mas	143.9 mas	43.795573	-0.127518		13	OH 43.8-0.1				46.51	17.2 +- 0.1
	+19 11 54.0663	+09 35 50.4122	-204.2 mas	121.4 mas	43.795564	-0.127516		14	OH 43.8-0.1				42.1	16.2 +- 0.1
	+19 11 54.0695	+09 35 50.4249	-155.6 mas	134.1 mas	43.795574	-0.127526		15	OH 43.8-0.1				41.35	14.9 +- 0.1
	+19 11 54.0685	+09 35 50.4168	-171 mas	126 mas	43.795570	-0.127523		16	OH 43.8-0.1				40.34	10.8 +- 0.1
	+19 11 54.0802	+09 35 50.2938	4 mas	3 mas	43.795562	-0.127581		17	OH 43.8-0.1				36.52	9.7 +- 0.1
	+19 11 54.064	+09 35 50.3848	-239.5 mas	94 mas	43.795553	-0.127511		18	OH 43.8-0.1				41.53	7.9 +- 0.1
	+19 11 54.0817	+09 35 49.249	26.6 mas	-1041.8 mas	43.795307	-0.127721		19	OH 43.8-0.1				37.83	7.6 +- 0.1
	+19 11 54.0655	+09 35 50.3959	-216.1 mas	105.1 mas	43.795559	-0.127515		20	OH 43.8-0.1				41.83	6.8 +- 0.1
	+19 11 54.0749	+09 35 50.0195	-75.2 mas	-271.3 mas	43.795484	-0.127597		21	OH 43.8-0.1				38.52	6.6 +- 0.1
	+19 11 54.0809	+09 35 49.8159	14 mas	-474.9 mas	43.795445	-0.127645		22	OH 43.8-0.1				45.28	5.7 +- 0.1
	+19 11 54.1014	+09 35 50.1814	322.8 mas	-109.4 mas	43.795574	-0.127673		23	OH 43.8-0.1				40.36	5.2 +- 0.1
	+19 11 54.0893	+09 35 49.4833	140.2 mas	-807.5 mas	43.795379	-0.127719		24	OH 43.8-0.1				41.27	4.9 +- 0.1
	+19 11 54.0684	+09 35 50.413	-173.2 mas	122.2 mas	43.795568	-0.127523		25	OH 43.8-0.1				40.37	4.9 +- 0.1
	+19 11 54.0749	+09 35 50.3657	-74.6 mas	74.9 mas	43.795569	-0.127553		26	OH 43.8-0.1				40.25	4.5 +- 0.1
	+19 11 54.0788	+09 35 49.982	-17.1 mas	-308.8 mas	43.795482	-0.127616		27	OH 43.8-0.1				39.57	4.5 +- 0.1
	+19 11 54.1008	+09 35 50.1872	313.4 mas	-103.6 mas	43.795575	-0.127670		28	OH 43.8-0.1				40.68	4.4 +- 0.1
	+19 11 54.0622	+09 35 49.7851	-266.3 mas	-505.7 mas	43.795402	-0.127581		29	OH 43.8-0.1				45.08	4.0 +- 0.1
	+19 11 54.0747	+09 35 50.0155	-78.4 mas	-275.3 mas	43.795483	-0.127597		30	OH 43.8-0.1				38.19	3.6 +- 0.1
	+19 11 54.0688	+09 35 50.4161	-166.6 mas	125.3 mas	43.795570	-0.127524		31	OH 43.8-0.1				40.5	3.2 +- 0.1
	+19 11 54.062	+09 35 50.2446	-269.2 mas	-46.2 mas	43.795515	-0.127521		32	OH 43.8-0.1				41.63	3.2 +- 0.1
	+19 11 54.0636	+09 35 50.3862	-244.4 mas	95.4 mas	43.795553	-0.127509		33	OH 43.8-0.1				41.87	3.1 +- 0.1
	+19 11 54.0669	+09 35 50.4078	-195.9 mas	117 mas	43.795564	-0.127518		34	OH 43.8-0.1				40.78	3.1 +- 0.1
	+19 11 54.0798	+09 35 50.2876	-2.3 mas	-3.2 mas	43.795559	-0.127581		35	OH 43.8-0.1				38.05	3.1 +- 0.1
	+19 11 54.0834	+09 35 49.8159	51.8 mas	-474.9 mas	43.795450	-0.127654		36	OH 43.8-0.1				36.91	2.9 +- 0.1
	+19 11 54.0752	+09 35 50.0289	-70.3 mas	-261.9 mas	43.795487	-0.127597		37	OH 43.8-0.1				42.05	2.7 +- 0.1
	+19 11 54.0861	+09 35 49.4861	92.7 mas	-804.7 mas	43.795374	-0.127707		38	OH 43.8-0.1				42.85	2.7 +- 0.1
	+19 11 54.0655	+09 35 50.3868	-216.5 mas	96 mas	43.795557	-0.127516		39	OH 43.8-0.1				46.66	2.6 +- 0.1
	+19 11 54.0697	+09 35 50.4257	-153.4 mas	134.9 mas	43.795574	-0.127526		40	OH 43.8-0.1				47.65	2.5 +- 0.1
	+19 11 54.0816	+09 35 49.9594	25.8 mas	-331.4 mas	43.795482	-0.127630		41	OH 43.8-0.1				32.76	2.4 +- 0.1
	+19 11 54.0783	+09 35 49.9818	-23.9 mas	-309 mas	43.795481	-0.127615		42	OH 43.8-0.1				40.12	2.4 +- 0.1
	+19 11 54.0707	+09 35 50.0811	-138.9 mas	-209.7 mas	43.795491	-0.127574		43	OH 43.8-0.1				47.5	2.3 +- 0.1
	+19 11 54.0671	+09 35 50.4087	-191.8 mas	117.9 mas	43.795565	-0.127519		44	OH 43.8-0.1				41.07	2.2 +- 0.1
	+19 11 54.0813	+09 35 49.4679	21 mas	-822.9 mas	43.795360	-0.127692		45	OH 43.8-0.1				42.15	2.2 +- 0.1
	+19 11 54.0687	+09 35 50.4118	-167.8 mas	121 mas	43.795569	-0.127525		46	OH 43.8-0.1				39.27	2.2 +- 0.1
	+19 11 54.0804	+09 35 49.49	7.3 mas	-800.8 mas	43.795364	-0.127686		47	OH 43.8-0.1				39.89	2.2 +- 0.1
	+19 11 54.078	+09 35 50.3211	-29.5 mas	30.3 mas	43.795564	-0.127570		48	OH 43.8-0.1				39.31	2.1 +- 0.1
	+19 11 54.0703	+09 35 50.4271	-144.1 mas	136.3 mas	43.795576	-0.127528		49	OH 43.8-0.1				41.04	2.1 +- 0.1
	+19 11 54.0825	+09 35 49.4731	39.1 mas	-817.7 mas	43.795364	-0.127695		50	OH 43.8-0.1				42.08	2.0 +- 0.1
	+19 11 54.0804	+09 35 49.4846	6.9 mas	-806.2 mas	43.795363	-0.127686		51	OH 43.8-0.1				38.22	2.0 +- 0.1
	+19 11 54.0621	+09 35 50.2484	-267.7 mas	-42.4 mas	43.795516	-0.127521		52	OH 43.8-0.1				42.25	1.8 +- 0.1
	+19 11 54.0619	+09 35 49.7943	-270.9 mas	-496.5 mas	43.795404	-0.127579		53	OH 43.8-0.1				43.29	1.8 +- 0.1
	+19 11 54.0856	+09 35 49.7967	85.1 mas	-494.1 mas	43.795449	-0.127665		54	OH 43.8-0.1				42.07	1.7 +- 0.1
	+19 11 54.0748	+09 35 50.0195	-76.6 mas	-271.3 mas	43.795484	-0.127597		55	OH 43.8-0.1				40.42	1.7 +- 0.1
	+19 11 54.0672	+09 35 50.2921	-191.2 mas	1.3 mas	43.795536	-0.127534		56	OH 43.8-0.1				40.32	1.7 +- 0.1
	+19 11 54.0852	+09 35 49.4368	78.5 mas	-854 mas	43.795360	-0.127710		57	OH 43.8-0.1				40.66	1.6 +- 0.1
	+19 11 54.0648	+09 35 50.3913	-226.9 mas	100.5 mas	43.795556	-0.127513		58	OH 43.8-0.1				41.09	1.5 +- 0.1
	+19 11 54.086	+09 35 49.4856	91.9 mas	-805.2 mas	43.795374	-0.127707		59	OH 43.8-0.1				42.65	1.5 +- 0.1
	+19 11 54.0618	+09 35 50.2599	-272.1 mas	-30.9 mas	43.795518	-0.127519		60	OH 43.8-0.1				42.78	1.5 +- 0.1
	+19 11 54.0662	+09 35 50.3985	-205.2 mas	107.7 mas	43.795561	-0.127517		61	OH 43.8-0.1				40.25	1.4 +- 0.1
	+19 11 54.0742	+09 35 50.3712	-86.3 mas	80.4 mas	43.795569	-0.127550		62	OH 43.8-0.1				39.51	1.4 +- 0.1
	+19 11 54.0798	+09 35 50.0483	-2.3 mas	-242.5 mas	43.795500	-0.127611		63	OH 43.8-0.1				42.29	1.3 +- 0.1
	+19 11 54.103	+09 35 50.0535	345.6 mas	-237.3 mas	43.795546	-0.127695		64	OH 43.8-0.1				41.72	1.3 +- 0.1
	+19 11 54.0751	+09 35 50.0226	-73 mas	-268.2 mas	43.795485	-0.127598		65	OH 43.8-0.1				39.22	1.3 +- 0.1
	+19 11 54.0762	+09 35 50.0429	-55.6 mas	-247.9 mas	43.795492	-0.127599		66	OH 43.8-0.1				35.09	1.3 +- 0.1
	+19 11 54.0736	+09 35 49.985	-94.8 mas	-305.8 mas	43.795473	-0.127597		67	OH 43.8-0.1				42.41	1.3 +- 0.1
	+19 11 54.0753	+09 35 50.3648	-69.8 mas	74 mas	43.795570	-0.127554		68	OH 43.8-0.1				40.33	1.2 +- 0.1
	+19 11 54.0969	+09 35 50.5333	255.2 mas	242.5 mas	43.795652	-0.127612		69	OH 43.8-0.1				41.67	1.1 +- 0.1
	+19 11 54.0741	+09 35 50.0043	-88 mas	-286.5 mas	43.795479	-0.127596		70	OH 43.8-0.1				38.8	1.1 +- 0.1
	+19 11 54.0867	+09 35 49.4692	101.8 mas	-821.6 mas	43.795371	-0.127711		71	OH 43.8-0.1				40.72	1.0 +- 0.1
	+19 11 54.0842	+09 35 49.7959	64.7 mas	-494.9 mas	43.795447	-0.127660		72	OH 43.8-0.1				41.53	1.0 +- 0.1
	+19 11 54.1022	+09 35 50.1305	333.7 mas	-160.3 mas	43.795563	-0.127682		73	OH 43.8-0.1				39.80 +- 0.01	0.84 +- 0.03
	+19 11 54.0794	+09 35 49.4887	-8 mas	-802.1 mas	43.795362	-0.127682		74	OH 43.8-0.1				40.30 +- 0.01	0.79 +- 0.01
	+19 11 54.1021	+09 35 50.1309	333.4 mas	-159.9 mas	43.795563	-0.127682		75	OH 43.8-0.1				39.73 +- 0.01	0.78 +- 0.01
	+19 11 54.0755	+09 35 50.0332	-66.1 mas	-257.6 mas	43.795489	-0.127598		76	OH 43.8-0.1				34.78 +- 0.01	0.77 +- 0.01
	+19 11 54.0773	+09 35 50.0427	-38.7 mas	-248.1 mas	43.795494	-0.127603		77	OH 43.8-0.1				37.51 +- 0.01	0.73 +- 0.01
	+19 11 54.0797	+09 35 50.2951	-2.6 mas	4.3 mas	43.795561	-0.127580		78	OH 43.8-0.1				38.98 +- 0.01	0.69 +- 0.01
	+19 11 54.08	+09 35 49.4955	0.6 mas	-795.3 mas	43.795365	-0.127683		79	OH 43.8-0.1				38.59 +- 0.01	0.69 +- 0.01
	+19 11 54.062	+09 35 50.2537	-268.7 mas	-37.1 mas	43.795517	-0.127520		80	OH 43.8-0.1				42.71 +- 0.01	0.68 +- 0.01
	+19 11 54.0752	+09 35 50.0281	-71 mas	-262.7 mas	43.795487	-0.127597		81	OH 43.8-0.1				41.82 +- 0.01	0.66 +- 0.02
	+19 11 54.0828	+09 35 49.4864	42.8 mas	-804.4 mas	43.795368	-0.127695		82	OH 43.8-0.1				33.72 +- 0.01	0.66 +- 0.10
	+19 11 54.0666	+09 35 50.4064	-200.4 mas	115.6 mas	43.795563	-0.127517		83	OH 43.8-0.1				41.02 +- 0.01	0.65 +- 0.01
	+19 11 54.0755	+09 35 50.0323	-66.1 mas	-258.5 mas	43.795488	-0.127598		84	OH 43.8-0.1				43.33 +- 0.01	0.61 +- 0.01
	+19 11 54.0759	+09 35 50.0439	-60.7 mas	-246.9 mas	43.795492	-0.127598		85	OH 43.8-0.1				38.03 +- 0.01	0.59 +- 0.01
	+19 11 54.0748	+09 35 50.0197	-76.4 mas	-271.1 mas	43.795484	-0.127597		86	OH 43.8-0.1				39.39 +- 0.01	0.58 +- 0.01
	+19 11 54.0745	+09 35 50.0129	-81.2 mas	-277.9 mas	43.795482	-0.127597		87	OH 43.8-0.1				43.22 +- 0.01	0.57 +- 0.01
	+19 11 54.0745	+09 35 50.0129	-81.2 mas	-277.9 mas	43.795482	-0.127597		88	OH 43.8-0.1				43.22 +- 0.01	0.56 +- 0.01
	+19 11 54.062	+09 35 50.2467	-268.5 mas	-44.1 mas	43.795515	-0.127521		89	OH 43.8-0.1				42.21 +- 0.01	0.56 +- 0.01
	+19 11 54.0826	+09 35 49.4735	40.1 mas	-817.3 mas	43.795364	-0.127696		90	OH 43.8-0.1				42.02 +- 0.01	0.55 +- 0.01
	+19 11 54.062	+09 35 50.3065	-268.9 mas	15.7 mas	43.795530	-0.127514		91	OH 43.8-0.1				42.93 +- 0.01	0.53 +- 0.01
	+19 11 54.0802	+09 35 49.4936	4 mas	-797.2 mas	43.795365	-0.127684		92	OH 43.8-0.1				41.24 +- 0.01	0.53 +- 0.01
	+19 11 54.0828	+09 35 49.4862	43 mas	-804.6 mas	43.795368	-0.127695		93	OH 43.8-0.1				33.76 +- 0.01	0.52 +- 0.01
	+19 11 54.0621	+09 35 50.249	-266.7 mas	-41.8 mas	43.795516	-0.127521		94	OH 43.8-0.1				42.43 +- 0.01	0.49 +- 0.01
	+19 11 54.0757	+09 35 50.0339	-63.9 mas	-256.9 mas	43.795489	-0.127598		95	OH 43.8-0.1				36.46 +- 0.01	0.48 +- 0.01
	+19 11 54.0799	+09 35 50.2934	-0.2 mas	2.6 mas	43.795561	-0.127580		96	OH 43.8-0.1				37.83 +- 0.01	0.45 +- 0.01
	+19 11 54.075	+09 35 50.0214	-74.2 mas	-269.4 mas	43.795485	-0.127597		97	OH 43.8-0.1				36.56 +- 0.01	0.45 +- 0.01
	+19 11 54.0847	+09 35 49.799	71.3 mas	-491.8 mas	43.795448	-0.127661		98	OH 43.8-0.1				42.21 +- 0.01	0.43 +- 0.02
	+19 11 54.0754	+09 35 50.0316	-67.3 mas	-259.2 mas	43.795488	-0.127598		99	OH 43.8-0.1				45.00 +- 0.01	0.42 +- 0.01
	+19 11 54.0814	+09 35 49.9622	22.3 mas	-328.6 mas	43.795482	-0.127628		100	OH 43.8-0.1				33.21 +- 0.01	0.41 +- 0.01
	+19 11 54.0703	+09 35 50.427	-143.9 mas	136.2 mas	43.795576	-0.127528		101	OH 43.8-0.1				46.51 +- 0.02	0.40 +- 0.01
	+19 11 54.0694	+09 35 50.4294	-157.5 mas	138.6 mas	43.795574	-0.127525		102	OH 43.8-0.1				41.82 +- 0.01	0.38 +- 0.01
	+19 11 54.0751	+09 35 50.0262	-71.8 mas	-264.6 mas	43.795486	-0.127597		103	OH 43.8-0.1				40.63 +- 0.01	0.36 +- 0.01
	+19 11 54.102	+09 35 50.1328	331.5 mas	-158 mas	43.795563	-0.127682		104	OH 43.8-0.1				39.59 +- 0.01	0.35 +- 0.01
	+19 11 54.0784	+09 35 49.932	-22.4 mas	-358.8 mas	43.795469	-0.127621		105	OH 43.8-0.1				48.30 +- 0.01	0.35 +- 0.01
	+19 11 54.0853	+09 35 49.4699	80.9 mas	-820.9 mas	43.795368	-0.127706		106	OH 43.8-0.1				41.42 +- 0.01	0.35 +- 0.01
	+19 11 54.0821	+09 35 49.4744	32.2 mas	-816.4 mas	43.795363	-0.127694		107	OH 43.8-0.1				42.27 +- 0.01	0.32 +- 0.01
	+19 11 54.0791	+09 35 49.8328	-12.2 mas	-458 mas	43.795446	-0.127637		108	OH 43.8-0.1				48.35 +- 0.01	0.31 +- 0.01
	+19 11 54.0753	+09 35 50.0263	-69.8 mas	-264.5 mas	43.795486	-0.127598		109	OH 43.8-0.1				38.48 +- 0.02	0.30 +- 0.01
	+19 11 54.0798	+09 35 49.4941	-1.6 mas	-796.7 mas	43.795364	-0.127683		110	OH 43.8-0.1				37.55 +- 0.01	0.30 +- 0.01
	+19 11 54.0698	+09 35 50.4261	-152.2 mas	135.3 mas	43.795574	-0.127526		111	OH 43.8-0.1				46.46 +- 0.01	0.29 +- 0.01
	+19 11 54.0698	+09 35 50.4261	-152.2 mas	135.3 mas	43.795574	-0.127526		112	OH 43.8-0.1				47.37 +- 0.01	0.29 +- 0.01
	+19 11 54.062	+09 35 49.7895	-268.7 mas	-501.3 mas	43.795403	-0.127580		113	OH 43.8-0.1				43.70 +- 0.01	0.28 +- 0.01
	+19 11 54.0756	+09 35 50.0333	-64.5 mas	-257.5 mas	43.795489	-0.127598		114	OH 43.8-0.1				37.48 +- 0.01	0.27 +- 0.01
	+19 11 54.0768	+09 35 50.029	-46.9 mas	-261.8 mas	43.795490	-0.127603		115	OH 43.8-0.1				34.46 +- 0.01	0.27 +- 0.01
	+19 11 54.0845	+09 35 49.7977	68.3 mas	-493.1 mas	43.795448	-0.127661		116	OH 43.8-0.1				43.20 +- 0.01	0.26 +- 0.01

DSS colored	2MASS colored	WISE colored
SDSS color	IRAC color I1,I2,I4	GLIMPSE 360
PACS color (70-160 um)	SPIRE color (250-500 um)	NVSS (1.4GHz)
ATLASGAL 870 um	ATLASGAL 870 um + Planck	Bolocam 1.1 mm
UKIDSS K Download UKIDSS K FITS	2MASS K Download 2MASS K FITS

select MAX(h2o_data_all.ra_hms) as ra_hms,MAX(h2o_data_all.dec_dms) as dec_dms,MAX(h2o_data_all.source_name) as source_name,MAX(h2o_data_all.ra) as ra,MAX(h2o_data_all.dec) as dec,MAX(h2o_data_all.l) as l,MAX(h2o_data_all.b) as b,MAX(h2o_data_all.grp) as grp,MAX(h2o_data_all.other_name) as other_name,MAX(h2o_data_all.other_desc) as other_desc,BOOL_OR(thermal) as thermal,MAX(h2o_data_all.line) as line,MAX(h2o_data_all.vrange) as vrange,MAX(h2o_data_all.vpeak) as vpeak,MAX(h2o_data_all.peak) as peak,MAX(h2o_data_all.fwhm) as fwhm,MAX(h2o_data_all.int) as int,MAX(h2o_data_all.rms) as rms,MAX(h2o_data_all.units) as units,MAX(h2o_data_all.units_rms) as units_rms,MAX(h2o_data_all.date_txt) as date_txt,MAX(h2o_data_all.telescope_ref) as telescope_ref,MAX(h2o_data_all.telescope_conf) as telescope_conf,MAX(h2o_data_all.v_step) as v_step,MAX(h2o_data_all.beam) as beam,MAX(h2o_data_all.beam_maj) as beam_maj,MAX(h2o_data_all.beam_min) as beam_min,MAX(h2o_data_all.beam_pa) as beam_pa,MAX(h2o_data_all.ref) as ref,MAX(h2o_data_all.list_ref) as list_ref,MAX(h2o_data_all.ascii) as ascii,MAX(h2o_data_all.url) as url,MAX(h2o_data_all.image) as image,MAX(h2o_data_all.image2) as image2,MAX(h2o_data_all.image3) as image3,MAX(h2o_data_all.descr) as descr,MAX(h2o_data_all.id) as id,BOOL_OR(mjy_flag) as mjy_flag,BOOL_OR(rms_mjy_flag) as rms_mjy_flag,MAX(h2o_data_all.dist) as dist,1 as dist_parallax,MAX(h2o_data_all.date_txt) as date_txt,MAX(line_det) as line_det,MAX(type) as type,MAX(simbad_types_cat) as simbad_types_cat FROM h2o_data_all  LEFT JOIN all_objects_withmet ON h2o_data_all.grp=all_objects_withmet.group_name LEFT JOIN object_categories ON all_objects_withmet.group_name = object_categories.group_name_cat AND object_categories.tbl_cat = 'all_objects_withmet' LEFT JOIN transitions ON h2o_data_all.line=transitions."Line"  WHERE ref ilike 'SAR08' AND detected=true AND hide=false GROUP BY ref

select h2o_data_all.ra_hms,h2o_data_all.dec_dms,h2o_data_all.source_name,h2o_data_all.ra,h2o_data_all.dec,h2o_data_all.l,h2o_data_all.b,h2o_data_all.grp,h2o_data_all.other_name,h2o_data_all.other_desc,h2o_data_all.thermal,h2o_data_all.line,h2o_data_all.vrange,h2o_data_all.vpeak,h2o_data_all.peak,h2o_data_all.fwhm,h2o_data_all.int,h2o_data_all.rms,h2o_data_all.units,h2o_data_all.units_rms,h2o_data_all.date_txt,h2o_data_all.telescope_ref,h2o_data_all.telescope_conf,h2o_data_all.v_step,h2o_data_all.beam,h2o_data_all.beam_maj,h2o_data_all.beam_min,h2o_data_all.beam_pa,h2o_data_all.ref,h2o_data_all.list_ref,h2o_data_all.ascii,h2o_data_all.url,h2o_data_all.image,h2o_data_all.image2,h2o_data_all.image3,h2o_data_all.descr,h2o_data_all.id,h2o_data_all.mjy_flag,h2o_data_all.rms_mjy_flag,h2o_data_all.dist,h2o_data_all.dist_parallax,h2o_data_all.date_txt,line_det,type,simbad_types_cat FROM h2o_data_all   LEFT JOIN all_objects_withmet ON h2o_data_all.grp=all_objects_withmet.group_name LEFT JOIN object_categories ON all_objects_withmet.group_name = object_categories.group_name_cat AND object_categories.tbl_cat = 'all_objects_withmet' LEFT JOIN transitions ON h2o_data_all.line=transitions."Line"  WHERE ref ilike 'SAR08' AND detected=true AND hide=false ORDER BY detected DESC,id

Display data from paper

SAR08 - VLBA Observations of the Zeeman Effect in H2O Masers in OH 43.8-0.1

Interferometry data

View as list of objects

Detection table from Sarma et al. (2008)

SAR08 - VLBA Observations of the Zeeman Effect in H₂O Masers in OH 43.8-0.1