1333-C1--20_0

DISCLAIMER: The detailed information for each source shown in this section has been generated with an automatic reduction process, line fitting, and line identification tool. There is no guarantee about the quality of this information, and for research purposes you should perform line fitting and identification yourself. The data was taken in frequency switching mode, so some atmospheric lines could appear in the data. The detailed report is provided because it could be useful to get an idea of the main lines detected in each position.

CAUTION: Do not trust in wide lines (line width > 2 km/s) that might be due to baseline problems and/or atmospheric lines. Do not trust in “exotic” line identifications that are more likely due to a spurious match with the line catalogue.

1333-C1--20_0

Backend 3mm (85.0-110.5 GHz)

Found 100 lines:

Tmb (K)	Width (km/s)	I (K km/s)	Vlsr (km/s)	Obs. freq (MHz)	Rest freq (MHz)	S/N ratio	Transition
0.031 (0.013)	0.5 (0.5)	0.015 (0.015)	7.47 (0.06)	85138.69	85139.10	3.6	OCS 7→6
0.158 (0.011)	0.40 (0.09)	0.068 (0.014)	7.545 (0.009)	85161.78	85162.22	18.1	HC¹⁸O⁺ 1→0
1.132 (0.012)	0.432 (0.013)	0.521 (0.015)	7.5847 (0.0015)	85338.45	85338.90	109.0	c-C₃H₂ 2_1,2→1_0,1
0.245 (0.010)	0.09 (0.03)	0.024 (0.008)	7.61 (0.08)	85347.42	85347.87	4.9	HCS⁺ 2→1
0.078 (0.012)	0.34 (0.16)	0.029 (0.013)	7.500 (0.018)	85455.23	85455.66	8.0	CH₃C₂H 5₁→4₁
0.107 (0.011)	0.49 (0.14)	0.056 (0.015)	7.527 (0.016)	85456.85	85457.29	11.3	CH₃C₂H 5₀→4₀
0.064 (0.009)	0.45 (0.22)	0.030 (0.015)	7.635 (0.025)	85633.54	85634.01	7.1	C₄H 9→8 J=19/2→17/2
0.053 (0.012)	0.5 (0.4)	0.026 (0.017)	7.71 (0.04)	85672.09	85672.58	5.6	C₄H 9→8 J=17/2→15/2
0.257 (0.012)	0.42 (0.06)	0.114 (0.015)	7.678 (0.007)	85924.30	85924.79	24.3	NH₂D 1_1,1→1_0,1 F=0-1
0.354 (0.012)	0.42 (0.05)	0.159 (0.016)	7.574 (0.005)	85925.25	85925.70	33.7	NH₂D 1_1,1→1_0,1 F=2-1
0.862 (0.011)	0.518 (0.020)	0.475 (0.017)	7.6087 (0.0021)	85925.82	85926.28	83.1	NH₂D 1_1,1→1_0,1 F=2-2
0.339 (0.012)	0.41 (0.05)	0.148 (0.015)	7.642 (0.005)	85926.41	85926.88	32.8	NH₂D 1_1,1→1_0,1 F=1-2
0.289 (0.012)	0.42 (0.05)	0.128 (0.015)	7.562 (0.006)	85927.28	85927.73	27.3	NH₂D 1_1,1→1_0,1 F=1-0
0.087 (0.014)	0.37 (0.16)	0.035 (0.015)	7.516 (0.018)	86054.53	86054.97	8.6	HC¹⁵N 1→0
0.373 (0.013)	0.41 (0.04)	0.164 (0.016)	7.515 (0.005)	86093.52	86093.96	41.4	SO 2₂→1₁
0.026 (0.018)	0.6 (0.7)	0.016 (0.017)	7.49 (0.09)	86180.96	86181.39	3.0	CCS 6→5, N=7-6
0.166 (0.013)	0.49 (0.11)	0.087 (0.018)	7.483 (0.012)	86338.31	86338.73	16.5	H¹³CN 1₁→0₁
0.281 (0.013)	0.49 (0.07)	0.146 (0.018)	6.650 (0.007)	86339.73	86339.92	27.0	H¹³CN 1→0
0.061 (0.013)	0.4 (0.3)	0.029 (0.017)	7.52 (0.03)	86341.81	86342.25	5.9	H¹³CN 1₀→0₁
0.056 (0.012)	0.4 (0.3)	0.027 (0.018)	7.82 (0.04)	86670.27	86670.80	5.5	HCO 1_0,1→0_0,0 J=3/2→1/2 F=2→1
0.043 (0.016)	0.4 (0.4)	0.018 (0.017)	7.71 (0.05)	86707.87	86708.36	4.2	HCO 1_0,1→0_0,0 J=3/2→1/2 F=1→0
1.757 (0.012)	0.473 (0.009)	0.884 (0.016)	7.5238 (0.0010)	86753.85	86754.29	181.8	H¹³CO⁺ 1→0
0.043 (0.014)	0.4 (0.4)	0.017 (0.014)	7.69 (0.04)	86776.95	86777.44	5.2	HCO 1_0,1→0_0,0 J=1/2→1/2 F=1→1
1.681 (0.008)	0.677 (0.009)	1.211 (0.016)	7.4834 (0.0010)	88629.98	88630.42	114.1	HCN 1→0 F=1→1
0.021 (0.008)	0.4 (0.6)	0.010 (0.013)	8.55 (0.08)	88631.09	88631.85	1.4	HCN 1→0 F=2→1
2.600 (0.008)	0.747 (0.007)	2.068 (0.017)	7.4368 (0.0007)	88631.42	88631.85	179.4	HCN 1→0 F=2→1
0.125 (0.008)	0.85 (0.14)	0.113 (0.018)	6.537 (0.016)	88631.69	88631.85	8.7	HCN 1→0 F=2→1
1.658 (0.009)	0.543 (0.009)	0.958 (0.014)	7.5157 (0.0009)	88633.49	88633.94	113.4	HCN 1→0 F=0→1
0.151 (0.011)	0.39 (0.09)	0.063 (0.013)	7.551 (0.009)	88865.24	88865.70	17.7	H¹⁵NC 1→0
3.234 (0.008)	0.770 (0.006)	2.650 (0.017)	7.4878 (0.0006)	89188.08	89188.53	107.1	HCO⁺ 1→0
0.379 (0.008)	2.19 (0.09)	0.88 (0.03)	6.950 (0.009)	89188.24	89188.53	12.5	HCO⁺ 1→0
0.040 (0.012)	0.4 (0.4)	0.017 (0.014)	7.17 (0.04)	89407.47	89407.82	4.4	CH₂DOH 2(0,2)-1(0,1), e₀
0.026 (0.008)	0.26 (0.17)	0.007 (0.005)	11.103 (0.018)	89825.03	89826.55	3.9	C₈H^- 77-76 (!?)
0.014 (0.004)	0.6 (0.5)	0.009 (0.007)	5.47 (0.05)	89826.71	89826.55	2.2	C₈H^- 77-76 (!?)
0.0326 (0.0006)	0.113 (0.014)	0.0039 (0.0005)	Unavailable	89828.15	Unavailable	5.1	CH₃CN 6₂→5₂ (image band)
1.321 (0.018)	0.422 (0.017)	0.593 (0.022)	8.0713 (0.0018)	90662.94	90663.56	51.9	HNC 1→0
4.297 (0.014)	0.735 (0.007)	3.36 (0.03)	7.4397 (0.0008)	90663.13	90663.56	169.1	HNC 1→0
0.041 (0.017)	0.4 (0.5)	0.016 (0.021)	6.50 (0.06)	90977.29	90977.44	3.0	HC₃N J=10-9, F=10-10
0.362 (0.017)	0.50 (0.07)	0.192 (0.024)	7.564 (0.008)	90978.53	90979.00	25.9	HC₃N 10→9 (3 components around)
0.070 (0.008)	0.51 (0.17)	0.038 (0.012)	7.524 (0.019)	92493.80	92494.27	10.3	¹³CS 2→1
0.049 (0.008)	0.53 (0.22)	0.028 (0.011)	7.632 (0.024)	92981.09	92981.60	6.8	HDCS 3(0,3)-2(0,2) ? (CH3OCHO)
0.449 (0.008)	0.341 (0.019)	0.163 (0.009)	8.4014 (0.0021)	93171.13	93171.88	12.9	N₂H⁺ 1→0 F=1→1
1.400 (0.006)	0.740 (0.009)	1.103 (0.013)	7.2687 (0.0010)	93171.49	93171.88	40.1	N₂H⁺ 1→0 F=1→1
1.484 (0.008)	0.422 (0.007)	0.667 (0.009)	8.2700 (0.0007)	93172.99	93173.70	42.5	N₂H⁺ 1→0 F=1→2
1.949 (0.008)	0.431 (0.005)	0.893 (0.009)	7.3141 (0.0006)	93173.29	93173.70	55.9	N₂H⁺ 1→0 F=1→2
0.936 (0.008)	0.420 (0.009)	0.419 (0.009)	6.6988 (0.0011)	93173.48	93173.70	26.8	N₂H⁺ 1→0 F=1→2
1.120 (0.008)	0.409 (0.008)	0.488 (0.009)	7.1244 (0.0009)	93175.78	93176.13	32.3	N₂H⁺ 1→0 F=1→0
0.031 (0.009)	0.3 (0.3)	0.011 (0.009)	7.54 (0.03)	93266.91	93267.4	6.5	Unidentified
0.018 (0.008)	0.9 (1.1)	0.017 (0.019)	9.25 (0.12)	93453.32	93454.33	2.1	CH₃CCD 6(1)-5(1)
0.050 (0.008)	1.3 (0.5)	0.068 (0.022)	4.16 (0.06)	93849.27	93848.69	4.1	CNCHO 17(1,16)-17(0,17)
0.116 (0.008)	0.43 (0.09)	0.053 (0.010)	7.555 (0.009)	93869.61	93870.10	18.7	C₂S N=7→6 J=8→7
0.018 (0.008)	0.6 (0.8)	0.011 (0.014)	5.52 (0.08)	95805.96	95805.80	2.3	C₈H (1)
0.028 (0.006)	0.7 (0.5)	0.022 (0.012)	7.26 (0.05)	95946.94	95947.34	4.5	CH₃CHO 5_(0,5)→4_(0,4)
0.028 (0.008)	0.5 (0.4)	0.015 (0.012)	7.52 (0.05)	95962.97	95963.46	4.3	CH₃CHO 5(0,5)-4(0,4)
0.244 (0.007)	0.52 (0.04)	0.135 (0.010)	7.508 (0.005)	96412.47	96412.95	39.9	C³⁴S 2→1
0.025 (0.006)	2.2 (0.9)	0.058 (0.020)	10.57 (0.09)	96424.15	96425.62	1.8	CH₃CHO 5_(2,4)→4_(2,3) (2)
0.021 (0.006)	1.1 (0.7)	0.025 (0.014)	8.53 (0.08)	96424.81	96425.62	1.5	CH₃CHO 5_(2,4)→4_(2,3) (2)
0.526 (0.008)	0.530 (0.021)	0.296 (0.012)	7.4871 (0.0023)	96738.88	96739.36	69.5	CH₃OH 2_(-1,2)→1_(-1,1)
0.746 (0.007)	0.523 (0.014)	0.415 (0.011)	7.4905 (0.0016)	96740.89	96741.37	91.8	CH₃OH 2_(0,2)→1_(0,1) ++
0.100 (0.008)	0.44 (0.09)	0.047 (0.010)	7.493 (0.011)	96744.07	96744.55	13.2	CH₃OH 2_(0,2)→1_(0,1)
0.071 (0.006)	0.50 (0.12)	0.038 (0.009)	12.874 (0.015)	96753.29	96755.51	1.7	CH₃OH 2_(1,1)→1_(1,0) (1)
0.019 (0.006)	0.5 (0.5)	0.010 (0.009)	7.61 (0.05)	96754.99	96755.51	0.5	CH₃OH 2_(1,1)→1_(1,0) (1)
0.306 (0.007)	0.090 (0.016)	0.029 (0.006)	7.49 (0.08)	96860.85	96861.3	52.5	Unidentified
0.229 (0.008)	0.086 (0.024)	0.021 (0.006)	7.49 (0.08)	96867.39	96867.9	30.6	Unidentified
0.019 (0.009)	0.22 (0.19)	0.004 (0.004)	7.485 (0.020)	96902.50	96903.0	3.1	Unidentified 96.904 GHz
0.267 (0.006)	0.184 (0.012)	0.052 (0.004)	7.4846 (0.0023)	96903.89	96904.4	44.8	Unidentified 96.904 GHz
0.007 (0.003)	3.0 (2.2)	0.024 (0.014)	7.48 (0.22)	96905.06	96905.5	1.2	Unidentified 96.904 GHz
0.0084 (0.0006)	2.2 (0.3)	0.0193 (0.0022)	7.48 (0.04)	96908.96	96909.4	0.6	Unidentified 96.911 GHz
0.5055 (0.0017)	0.1716 (0.0012)	0.0923 (0.0007)	7.4845 (0.0004)	96910.44	96910.9	34.8	Unidentified 96.911 GHz
0.8891 (0.0012)	0.2648 (0.0009)	0.2506 (0.0008)	7.48450 (0.00009)	96910.80	96911.3	61.2	Unidentified 96.911 GHz
0.537 (0.007)	0.1581 (0.0016)	0.0903 (0.0007)	7.4843 (0.0013)	96925.42	96925.9	44.2	Unidentified 96.926 GHz
0.2286365781460111 (0.0)	0.0928657634757241 (0.0)	0.0226013070477637 (0.0)	7.48 (0.08)	96925.70	96926.2	18.9	Unidentified 96.926 GHz
3.0747903578385363 (0.0)	0.1200203955754954 (0.0)	0.3928283062923733 (0.0)	7.48 (0.08)	96925.80	96926.3	254.3	Unidentified 96.926 GHz
0.920 (0.006)	0.084 (0.005)	0.082 (0.005)	7.48 (0.08)	96946.94	96947.4	136.5	Unidentified 96.947 GHz
0.295 (0.011)	0.079 (0.024)	0.025 (0.008)	7.48 (0.08)	96968.48	96969.0	41.5	Unidentified
0.022 (0.008)	0.4 (0.4)	0.008 (0.009)	7.41 (0.05)	97080.27	97080.73	4.0	CH₂DCCH 6(0,6)-5(0,5)
0.031 (0.010)	0.3 (0.3)	0.010 (0.009)	8.26 (0.03)	97171.33	97172.06	4.9	C³³S 2→1
0.26 (0.04)	0.38 (0.13)	0.10 (0.04)	7.527 (0.015)	97714.91	97715.40	11.6	³⁴SO 3₍₂₎→2₍₁₎
2.869 (0.023)	0.664 (0.016)	2.03 (0.05)	7.5175 (0.0017)	97980.46	97980.95	125.0	CS 2→1
0.200 (0.022)	0.9 (0.3)	0.19 (0.06)	7.05 (0.03)	97980.61	97980.95	8.7	CS 2→1
0.08 (0.05)	0.2 (0.4)	0.02 (0.03)	7.93 (0.05)	97994.53	97995.17	0.6	l-C₃H J=9/2-7/2, Omega=1/2, F=5-4, l=e
0.08 (0.04)	0.3 (0.4)	0.03 (0.03)	5.24 (0.04)	98901.20	98900.95	3.6	CH₃CHO 5_(1,4)→4_(1,3) (2)
2.671 (0.022)	0.532 (0.013)	1.51 (0.04)	7.5155 (0.0014)	99299.39	99299.89	128.8	SO 3₍₂₎→2₍₁₎
0.16 (0.04)	0.38 (0.24)	0.06 (0.04)	7.42 (0.03)	101325.89	101326.4	6.0	Unidentified 101.327 GHz
0.10 (0.04)	0.4 (0.5)	0.05 (0.05)	7.54 (0.05)	101477.29	101477.81	4.0	H₂CS 3_(1,3)→2_(1,2)
0.090 (0.024)	0.5 (0.4)	0.04 (0.04)	7.55 (0.05)	102547.45	102547.98	4.1	CH₃CCH 6₍₀₎→5₍₀₎
0.12 (0.04)	0.22 (0.19)	0.028 (0.024)	7.35 (0.03)	106846.12	106846.6	6.8	Unidentified
0.183 (0.023)	0.47 (0.18)	0.09 (0.04)	7.482 (0.019)	108893.41	108893.95	9.8	CH₃OH 0_0,0→1_-1,1
0.246 (0.025)	0.48 (0.15)	0.13 (0.04)	7.550 (0.017)	109173.08	109173.64	12.0	HC₃N 12→11
0.48 (0.03)	0.46 (0.08)	0.23 (0.04)	7.530 (0.009)	109251.63	109252.18	23.2	SO 2₃→1₂
0.44 (0.03)	0.47 (0.08)	0.22 (0.04)	8.045 (0.009)	109781.43	109782.18	19.1	C¹⁸O 1→0
1.636 (0.022)	0.66 (0.03)	1.14 (0.05)	7.558 (0.003)	109781.61	109782.18	71.4	C¹⁸O 1→0
0.172 (0.025)	0.49 (0.21)	0.09 (0.04)	7.492 (0.023)	109905.20	109905.75	9.2	HNCO 5→4
0.13 (0.03)	0.4 (0.3)	0.06 (0.04)	7.62 (0.04)	110151.50	110152.09	5.5	NH₂D 1(1,1)0a-1(0,1)0s, F=0-1
0.14 (0.04)	0.4 (0.3)	0.06 (0.04)	7.63 (0.03)	110152.42	110153.02	5.8	NH₂D 1(1,1)0a-1(0,1)0s, F=2-1
0.33 (0.03)	0.45 (0.13)	0.16 (0.05)	7.608 (0.014)	110153.00	110153.59	14.1	NH₂D 1(1,1)0a-1(0,1)0s, F=2-2 & 1-1
0.095 (0.025)	0.4 (0.4)	0.04 (0.04)	7.58 (0.05)	110153.59	110154.17	3.9	NH₂D 1(1,1)0a-1(0,1)0s, F=1-2
0.10 (0.03)	0.3 (0.4)	0.03 (0.04)	7.54 (0.04)	110154.46	110155.03	4.1	NH₂D 1(1,1)0a-1(0,1)0s, F=1-0
2.77 (0.03)	3.68 (0.06)	10.83 (0.13)	7.660 (0.005)	110200.74	110201.35	12.9	¹³CO 1→0
5.55 (0.03)	0.903 (0.012)	5.34 (0.07)	7.6502 (0.0013)	110200.75	110201.35	25.8	¹³CO 1→0

Backend 2mm (134.6 GHz)

Found 7 lines:

Tmb (K)	Width (km/s)	I (K km/s)	Vlsr (km/s)	Obs. freq (MHz)	Rest freq (MHz)	S/N ratio	Transition
0.098 (0.020)	0.13 (0.12)	0.014 (0.013)	7.524 (0.014)	133734.02	133734.7	9.3	Unidentified 133.735 GHz
0.047 (0.017)	0.18 (0.24)	0.009 (0.012)	7.523 (0.020)	133837.31	133838.0	5.3	Unidentified 133.838 GHz
0.017 (0.008)	1.7 (2.0)	0.03 (0.04)	7.52 (0.20)	134023.93	134024.6	1.7	Unidentified 134.024 GHz
0.235 (0.009)	0.37 (0.06)	0.093 (0.014)	7.518 (0.005)	134284.22	134284.90	29.4	HDCO 2(1,1)-1(1,0)
0.020 (0.010)	1.0 (1.5)	0.02 (0.03)	7.52 (0.12)	134504.50	134505.2	2.1	Unidentified 134.505 GHz
0.138 (0.008)	0.07 (0.05)	0.010 (0.007)	7.55 (0.06)	135285.33	135286.03	13.9	H(36)</sup>\alpha</sup>
0.100 (0.009)	0.38 (0.15)	0.041 (0.016)	7.494 (0.012)	135297.59	135298.26	11.5	H₂CS 4(1,4)-3(1,3)

Backend 2mm (137.9 GHz)

Found 11 lines:

Tmb (K)	Width (km/s)	I (K km/s)	Vlsr (km/s)	Obs. freq (MHz)	Rest freq (MHz)	S/N ratio	Transition
0.058 (0.009)	0.39 (0.25)	0.024 (0.015)	7.603 (0.020)	137370.48	137371.21	7.2	H₂CS 4(0,4)-3(0,3)
0.066 (0.008)	0.43 (0.24)	0.030 (0.017)	7.542 (0.019)	137449.24	137449.95	8.4	H₂¹³CO 2(1,2)-1(1,1)
0.030 (0.008)	0.5 (0.6)	0.015 (0.017)	7.85 (0.05)	137453.61	137454.46	3.9	c-HCCCD 2(2,0)-1(1,1)
0.060 (0.017)	0.14 (0.16)	0.009 (0.010)	7.541 (0.018)	137553.97	137554.7	7.5	Unidentified 137.554 GHz
0.022 (0.009)	0.3 (0.7)	0.008 (0.016)	7.41 (0.06)	137652.88	137653.52	2.4	DC¹⁸O⁺ 2-1
2.040 (0.009)	0.421 (0.008)	0.915 (0.016)	7.5313 (0.0006)	138177.95	138178.66	252.7	SO 4₃→3₂
0.289 (0.010)	0.32 (0.05)	0.099 (0.014)	7.231 (0.004)	138178.09	138178.66	35.9	SO 4₃→3₂
0.018 (0.011)	0.3 (0.8)	0.006 (0.014)	7.60 (0.07)	138252.43	138253.17	2.1	CH₃OOH (3)
0.099 (0.013)	0.15 (0.09)	0.016 (0.009)	7.533 (0.009)	138254.03	138254.7	11.9	Unidentified 138.254 GHz
0.033 (0.009)	0.4 (0.5)	0.015 (0.017)	7.47 (0.04)	138738.58	138739.26	4.1	¹³CS 3→2
0.0 (0.5)	0.1 (1.3)	0.003 (0.020)	7.5 (0.4)	138753.43	138754.1	2.5	Unidentified 138.754 GHz

Backend 2mm (144.1 GHz)

Found 10 lines:

Tmb (K)	Width (km/s)	I (K km/s)	Vlsr (km/s)	Obs. freq (MHz)	Rest freq (MHz)	S/N ratio	Transition
0.10 (0.03)	0.17 (0.23)	0.017 (0.023)	7.563 (0.018)	143223.40	143224.2	5.9	Unidentified 143.224 GHz
0.13 (0.03)	0.17 (0.16)	0.023 (0.022)	7.562 (0.013)	143229.42	143230.2	7.9	Unidentified 143.229 GHz
0 (4)	0.01 (0.04)	0.002 (0.005)	7.56150 (0.00009)	143320.38	143321.1	16.3	Unidentified
2.984 (0.015)	0.457 (0.011)	1.45 (0.04)	7.5753 (0.0008)	144076.53	144077.29	200.4	DCO⁺ J=2-1 (multiple components around)
0.514 (0.019)	0.28 (0.05)	0.152 (0.025)	7.342 (0.004)	144076.64	144077.29	34.0	DCO⁺ J=2-1 (multiple components around)
0.107 (0.015)	0.4 (0.3)	0.05 (0.03)	7.548 (0.019)	144616.35	144617.10	7.3	C³⁴S 3→2
0.067 (0.015)	0.8 (0.7)	0.06 (0.05)	7.55 (0.05)	144825.94	144826.7	3.8	Unidentified 144.828 GHz
0.306 (0.015)	0.45 (0.10)	0.15 (0.04)	7.347 (0.008)	144827.35	144828.00	17.3	DCN 2→1
0.364 (0.014)	2.65 (0.20)	1.03 (0.07)	7.544 (0.013)	144913.25	144914.0	15.2	Unidentified 144.914 GHz
0.354 (0.014)	1.31 (0.14)	0.49 (0.05)	7.544 (0.009)	144913.60	144914.3	14.7	Unidentified 144.914 GHz

Backend 2mm (147.3 GHz)

Found 2 lines:

Tmb (K)	Width (km/s)	I (K km/s)	Vlsr (km/s)	Obs. freq (MHz)	Rest freq (MHz)	S/N ratio	Transition	Reduced spectrum	Original spectrum
1.643 (0.013)	0.530 (0.017)	0.93 (0.03)	7.5537 (0.0012)	146968.26	146969.03	113.3	CS 3→2
0.446 (0.013)	0.56 (0.07)	0.27 (0.03)	7.234 (0.005)	146968.42	146969.03	30.8	CS 3→2

Backend 2mm (168.2 GHz)

Found 1 lines:

Tmb (K)	Width (km/s)	I (K km/s)	Vlsr (km/s)	Obs. freq (MHz)	Rest freq (MHz)	S/N ratio	Transition	Reduced spectrum	Original spectrum
0.90 (0.07)	0.56 (0.17)	0.53 (0.16)	7.450 (0.011)	168761.94	168762.75	15.5	H₂S 1_(1,0)→1_(0,1)

Backend 2mm (171.5 GHz)