The OH Sky Line Database
Last Update: 4 December 1997
The main reference used for this line list intensity
is Maihara et al (1993) with Olivia & Origilia (1992) filling
up some lines in the short and long wavelength ends of the 1-2
microns range. Some fine tuning of the original data was done
by de-blending a few lines. Some patterns are regular (e.g. P1
is three times brighter than P2). Line intensities are variable
and references in the literature do disagree (e.g. Maihara et
al (1993) is middle of the road, Olivia & Origilia (1992)
are factor of two lower, while Ramsey et al (1992) records intensities
of 3-4 higher. The strength of the OH lines is most likely site
dependent and is definitely time dependent. As to the measurement
of the continuum between the lines, Tom Herbst (1994) does a good
job at collating information. With OH suppression, the actual
continuum left after the lines are masks is the limiting background,
so it will be important to measure the continuum at the site.
1. The first three columns give the line identification.
The P and R branch lines are doublet while the Q-branch lines
are quadruplet. The nomenclature used is Chamberlain (1955), except
lines shortward of 1.0729 micron which use Herzburg (1955) notation.
2. The fourth columns gives the line position in
angstroms. Most of these numbers are derived from the molecular
constants given in Abrams et al (1994). Maihara et al. wavelengths
for the Q-branch lines which are very close to the theoretical
positions of the Q1 lines are used.
3. The fifth column gives the difference between
the two members of the doublet (all the lines listed are in fact
doublets unresolvable at R < 100000 which is also the expected
thermal and pressure broadening width of these lines) or the two
extreme members of the quadruplet in angstroms (for the Q-branch
lines).
4. The sixth column gives the intensity of the lines
in photons*s-1*m-2*arcsec-2. Some lines are kept without intensities.
These might be contributing significantly to the strength of another
nearby line. For these lines, all the strength of the line was
assigned to one of the two possible members of the blends. The
choice was made by realizing that the observed wavelengths as
given in Maihara et al. almost exactly coincided with one of the
two lines (obviously the main contributor). Lines shorter than
1.0728 micron are taken from Osterbrock et al (1996) and have
been assigned relative intensities based on their measurements
with a scale appropriate to each order, most likely underestimated.
Then again, these line intensities due vary with location and
time.
Questions or comments about the above to Kim Ennico
kennico@ast.cam.ac.uk
Last modified: 4 December 1997
OH Skylines
9-5 P2 (2.5)
10103.6 - 3.75
*scale1 9-5 P1e,f (3.5)
10124 0.2 7
*scale1 9-5 P2 (3.5)
10153 - 3
*scale1 9-5 P1e,f (4.5)
10171.7 0.4 4.3
*scale1 4-1 R2 (2.5)
10181 - 0.9
*scale1 4-1 R1 (2.5)
10189.7 - 4.9
*scale1 4-1 R1 (1.5)
10203 - 2.25
*scale1 9-5 P2 (4.5)
10208.8 - 1.75
*scale1 4-1 R1 (1.5)
10211 - 7.5
*scale1 9-5 P1e,f (5.5)
10225.8 0.6 2
*scale1 4-1 R2 (0.5)
10230.7 - 2.1
*scale1 4-1 Q1 (1.5)
10286.6 - 9.75
*scale1 4-1 Q1e,f (2.5)
10296 0.4 1.8
*scale1 4-1 P2 (1.5)
10347.3 - 0.2
*scale2 4-1 P1 (2.5)
10372.9 - 1
*scale2 4-1 P2 (2.5)
10396.5 - 0.375
*scale2 4-1 P1e,f (3.5)
10418.4 0.3 0.7
*scale2 4-1 P2 (3.5)
10450.5 - 0.25
*scale2 4-1 P1e,f (4.5)
10468.9 0.5 0.25
*scale2 5-2 R1 (1)
10728.8 0.1 12
5-2 R2 (1)
10743.2 0 4
5-2 R1 (0)
10751 0.1 49
5-2 R2 (0)
10772.1 0.1 16
5-2 Q2 (1)
10829.3 0 15
5-2 Q1 (1)
10831.3 0 45
5-2 Q2 (2)
10837.8 0 5.5
5-2 Q1 (2)
10841.7 0.1 16.5
5-2 P2 (1)
10895.7 0.1 11
5-2 P1 (1)
10923.4 0.2 27
5-2 P2 (2)
10948.4 0.1 11
5-2 P1 (2)
10972.3 0.3 39
5-2 P2 (3)
11006.3 0 11
5-2 P1 (3)
11026.8 0.5 28
5-2 P2 (4)
11069.4 0.2 8
5-2 P1 (4)
11087 0.7 17
5-2 P2 (5)
11137.9 0.3 1
5-2 P1 (5)
11153 0.9 4
6-3 R1 (2)
11309.8 0.2 3
6-3 R1 (1)
11328.1 0.1 6
6-3 R1 (0)
11351.1 0.1 3
6-3 Q2 (1)
11434.6 0 5.5
6-3 Q1 (1)
11436.8 0 16.5
6-3 Q2 (2)
11444.1 0.1 4.25
6-3 Q1 (2)
11448.5 0.1 12.75
6-3 P2 (1)
11505.5 0.2 3
6-3 P1 (1)
11535.6 0.2 45
6-3 P2 (2)
11562.1 0.1 3
6-3 P1 (2)
11588.5 0.3 54
6-3 P2 (3)
11624.7 0 11
6-3 P1 (3)
11647.6 0.5 38
6-3 P2 (4)
11693.2 0.2 6
6-3 P1 (4)
11712.9 0.7 92
6-3 P2 (5)
11767.6 0.4 2
6-3 P1 (5)
11784.8 0.9 7
6-3 P2 (6)
11848.2 0.5 1
6-3 P1 (6)
11863.3 1.2 3
7-4 R1 (3)
11972.6 0.2 25
7-4 R2 (3)
11980 0.2 2
7-4 R1 (2)
11985.4 0.2 30
7-4 R2 (2)
11996.9 0.1 11
7-4 R1 (1)
12003.8 0.1 44
7-4 R2 (1)
12021 0 25
7-4 R1 (0)
12027.6 0.1 85
7-4 R2 (0)
12052.6 0.1 26
7-4 Q2 (1)
12117.1 0 27.75
7-4 Q1 (1)
12119.3 0 83.25
7-4 Q2 (2)
12127.8 0.1 10
7-4 Q1 (2)
12132.6 0.1 30
7-4 Q2 (3)
12145.4 0.1 4.5
7-4 Q1 (3)
12151.6 0.1 13.5
7-4 P2 (1)
12193.1 0.2 38
7-4 P1 (1)
12225.9 0.2 109
7-4 P2 (2)
12254.4 0.1 59
7-4 P1 (2)
12283.6 0.3 113
7-4 P2 (3)
12322.5 0 22
7-4 P1 (3)
12348.2 0.5 82
7-4 P2 (4)
12397.5 0.2 6
7-4 P1 (4)
12419.9 0.8 114
7-4 P2 (5)
12479.3 0.4 3
7-4 P1 (5)
12499 1 31
7-4 P1 (6)
12585.5 1.3 4
O2 - -
12685.7 - 80
O2 - -
12695.1 - 64
O2 - -
12702 - 37
O2 - -
12714 - 39
O2 - -
12726.1 - 20
O2 - -
12744.6 - 24
8-5 R1 (3)
12749.3 0.1 45
8-5 R1 (2)
12760.9 0.1 76
O2 - -
12776 - 32
8-5 R1 (1)
12779.1 0.1 149
O2 - -
12798 - 57
8-5 R1 (0)
12803.5 0.1 107
O2 - -
12824.8 - 25
8-5 R2 (0)
12831.1 0.1 58
O2 - -
12845 - 35
O2 - -
12866 - 31
8-5 Q2 (1)
12900 0.1 65.25
8-5 Q1 (1)
12902.2 0 185.75
8-5 Q2 (2)
12912.3 0.1 21
8-5 Q1 (2)
12917.6 0.1 63
8-5 Q2 (3)
12932.5 0.1 6.5
8-5 Q1 (3)
12939.6 0.2 19.5
8-5 P2 (1)
12982.1 0.2 67
8-5 P1 (1)
13018.1 0.2 187
8-5 P2 (2)
13049.2 0.1 82
8-5 P1 (2)
13081.7 0.4 277
8-5 P2 (3)
13124.2 0 99
8-5 P1 (3)
13153.2 0.6 77
8-5 P2 (4)
13207.2 0.2 47
8-5 P1 (4)
13232.9 0.8 104
8-5 P1 (5)
13321 1.1 29
8-5 P1 (6)
13417.9 1.4 26
2-0 P2 (1)
14465.2 0.2 7
2-0 P1 (1)
14515 0.3 22
2-0 P2 (2)
14560 0.1 12
2-0 P1 (2)
14600.8 0.6 19
2-0 P2 (3)
14661.1 0.2 5
2-0 P1 (3)
14694.4 0.9 15
3-1 R1 (3)
14736 0.6 6
3-1 R1 (2)
14779.7 0.5 13
2-0 P1 (4)
14795.8 1.2 2
3-1 R2 (2)
14801.7 0.2 13
3-1 R1 (1)
14829 0.4 22
3-1 R2 (1)
14860.3 0 6
3-1 R1 (0)
14883.6 0.2 30
2-0 P1 (5)
14905 1.5 4
3-1 R2 (0)
14927.8 0.2 9
3-1 Q2 (1)
15048.8 0 25.5
3-1 Q1 (1)
15051.4 0 76.5
3-1 Q2 (2)
15059.9 0.1 9.5
3-1 Q1 (2)
15064.8 0.1 28.5
3-1 Q2 (3)
15078.1 0 2.75
3-1 Q1 (3)
15084.2 0.1 8.25
3-1 P2 (1)
15183 0.3 20
3-1 P1 (1)
15236.8 0.3 90
3-1 P2 (2)
15283.6 0.1 45
3-1 P1 (2)
15328.2 0.6 177
3-1 P2 (3)
15391.1 0.2 54
3-1 P1 (3)
15427.9 0.9 163
4-2 R1 (4)
15457.9 0.6 4
4-2 R1 (3)
15496.6 0.6 17
3-1 P2 (4)
15505.5 0.4 44
4-2 R2 (3)
15513.6 0.3 20
3-1 P1 (4)
15536.1 1.2 71
4-2 R1 (2)
15541.9 0.5 44
4-2 R2 (2)
15565.9 0.2 32
4-2 R1 (1)
15593.4 0.4 113
3-1 P2 (5)
15627.1 0.7 -
4-2 R2 (1)
15627.3 0 56
4-2 R1 (0)
15650.7 0.2 188
3-1 P1 (5)
15652.7 1.6 -
4-2 R2 (0)
15698.2 0.2 41
3-1 P2 (6)
15756 1 8
O2 - -
15800 - 5
4-2 Q2 (1)
15826 0 84.5
4-2 Q1 (1)
15828.9 0 253.5
4-2 Q2 (2)
15838.2 0.1 23
4-2 Q1 (2)
15843.7 0.1 69
4-2 Q2 (3)
15858.2 0 7.25
4-2 Q1 (3)
15865 0.2 21.75
4-2 Q2 (4)
15885.7 0 1.25
4-2 Q1 (4)
15892.9 0.3 3.75
4-2 P2 (1)
15968.2 0.3 100
4-2 P1 (1)
16026.4 0.3 299
4-2 P2 (2)
16075.4 0.1 125
4-2 P1 (2)
16124.2 0.6 296
4-2 P2 (3)
16190.2 0.1 61
4-2 P1 (3)
16230.9 1 297
5-3 R1 (5)
16265.9 0.6 2
5-3 R2 (5)
16275.3 0.6 1
5-3 R1 (4)
16297.8 0.6 14
5-3 R2 (4)
16311.1 0.5 5
4-2 P2 (4)
16312.7 0.4 72
5-3 R1 (3)
16337.3 0.6 56
4-2 P1 (4)
16346.8 1.3 138
5-3 R2 (3)
16355.9 0.4 24
5-3 R1 (2)
16384 0.5 51
5-3 R2 (2)
16410.2 0.2 16
5-3 R1 (1)
16437.7 0.4 174
4-2 P2 (5)
16443.1 0.7 19
4-2 P1 (5)
16472 1.7 20
5-3 R2 (1)
16474.6 0 63
5-3 R1 (0)
16497.9 0.2 152
5-3 R2 (0)
16549.3 0.2 92
4-2 P2 (6)
16581.8 1.1 3
4-2 P1 (6)
16606.5 2.1 20
5-3 Q2 (1)
16684.6 0.1 107.75
5-3 Q1 (1)
16687.8 0 323.25
5-3 Q2 (2)
16698.1 0.1 36
5-3 Q1 (2)
16704.3 0.1 108
5-3 Q2 (3)
16720.2 0.1 11.5
5-3 Q1 (3)
16727.9 0.2 34.5
5-3 Q2 (4)
16750.7 0 1.5
5-3 Q1 (4)
16759 0.3 4.5
5-3 P2 (1)
16835.9 0.3 71
5-3 P1 (1)
16899.1 0.4 244
5-3 P2 (2)
16950.4 0.1 122
5-3 P1 (2)
17004.1 0.7 301
5-3 P2 (3)
17073.7 0.1 82
5-3 P1 (3)
17119 1 199
5-3 P2 (4)
17205.6 0.4 60
5-3 P1 (4)
17243.9 1.4 107
6-4 R1 (3)
17278.1 0.6 47
6-4 R2 (3)
17298.6 0.4 12
6-4 R1 (2)
17326.1 0.5 58
5-3 P2 (5)
17346.4 0.7 53
6-4 R2 (2)
17354.9 0.2 42
5-3 P1 (5)
17379.1 1.8 60
6-4 R1 (1)
17381.9 0.4 126
6-4 R2 (1)
17422.3 0 45
6-4 R1 (0)
17445.2 0.2 160
5-3 P2 (6)
17496.4 1.1 9
6-4 R2 (0)
17501.1 0.2 55
5-3 P1 (6)
17524.6 2.2 28
6-4 Q2 (1)
17645 0.1 90.75
6-4 Q1 (1)
17648.4 0 272.25
6-4 Q2 (2)
17660 0.1 32.5
6-4 Q1 (2)
17667 0.1 97.5
6-4 Q2 (3)
17684.8 0.1 13
6-4 Q1 (3)
17693.6 0.2 39
6-4 Q2 (4)
17719 0 0.75
6-4 Q1 (4)
17728.6 0.3 2.25
6-4 P2 (1)
17806.6 0.3 72
6-4 P1 (1)
17875.4 0.4 268
6-4 P1 (2)
17989 0.7 204
6-4 P2 (3)
18063 0.1 12
6-4 P1 (3)
18113.5 1.1 27
8-6 R1 (5)
19523.3 0.4 14
7-5 P1 (5)
19555.7 2.1 10
8-6 R1 (3)
19588.1 0.5 6
8-6 R1 (2)
19637.1 0.5 18
8-6 R2 (2)
19672.6 0.3 7
8-6 R1 (1)
19696.7 0.4 32
8-6 R2 (1)
19746.1 0.1 10
8-6 R1 (0)
19766.5 0.2 46
8-6 R2 (0)
19834.3 0.2 15
8-6 Q2 (1)
19999.5 0.1 23.25
8-6 Q1 (1)
20002.7 0 69.75
8-6 Q2 (2)
20019.4 0.2 7
8-6 Q1 (2)
20027.7 0.1 21
8-6 Q2 (3)
20052.1 0.2 1.25
8-6 Q1 (3)
20063.5 0.2 3.75