Since we used Deckname C1 with the Red cross-disperser, this page tells us our resolution is 50,000.
(1)So:
(2)To find out our km/s per pixel, it just takes some algebra…
(3)Find out the spacing of the data at the wavelength that you're interested in — let's call it 's'; then we'd have:
(5)Resolution per pixel is then;
(6)which in our case is ~ 1.3 km/s per pixel.
A full calculation to see what goes on:
Measured Lambda | Delta Lambda | Pixel spacing @ Lambda | Delta Lambda/Pixel | km/s per pixel |
---|---|---|---|---|
5322.492538718 | 0.10644985077436 | 0.023 | 4.62825438149391 | 1.29638509585623 |
Now, for the sigma for the kernel that goes into our calibrations: it depends on the resolution and the wavelength of the order only… So…
Since the resolution is the FWHM; it relates to sigma via: 2.35*sigma = FWHM
(7)Transition | order | q value | min σv (m/s) | Iodine cell coverage? | Wavelength | f-value | Gamma | Atomic mass |
---|---|---|---|---|---|---|---|---|
FeII 1608.45 | 67 | −1030 ± 300 ∗ | 25.0 | yes | 1608.45085 | 0.0577 | 2.74e8 | 55.91 |
FeII 1611.20 | 67 | 1560 ± 500∗ | 153 | yes | 1611.20034 | 1.38e-3 | 2.86e8 | 55.91 |
AlII 1670.79 | 65 | 270±?∗∗∗ | 34.0 | yes | 1670.7886 | 1.740 | 1.390e9 | 27.00 |
NiII 1709.60 | 63 | −20 ± 250∗∗ | 83.1 | yes | 1709.6042 | 0.0324 | 4.35e8 | 58.76 |
NiII 1741.55 | 62 | −1400 ± 250∗∗ | 48.7 | yes | 1741.5531 | 0.042700 | 5.00E8 | 58.76 |
NiII 1751.92 | 62 | −700 ± 250∗∗ | 70.8 | yes | 1751.9157 | 0.027700 | 3.70E8 | 58.76 |
SiII 1808.01 | 60 | 520 ± 30∗∗ | 36.4 | yes | 1808.01288 | 0.00208 | 2.38e6 | 28.11 |
AlIII 1854.72 | 58 | 464±?∗∗∗ | 76.0 | yes | 1854.71829 | 0.559 | 5.42e8 | 27.00 |
AlIII 1862.79 | 58 | 216±?∗∗∗ | 125 | yes | 1862.79113 | 0.278 | 5.34e8 | 27.00 |
SiII 1526.71 | 71 | 50 ± 30∗∗ | 28.8 | no | 1526.70698 | 0.13300 | 1.13E9 | 28.11 |
ZnII 2026.14 | 53 | 2488 ± 25∗∗∗∗ | 129 | no | 2026.13709 | 0.501 | 4.07e8 | 65.47 |
ZnII 2062.66 | 52 | 1585 ± 25∗∗∗∗ | 229 | no | 2062.66045 | 0.246 | 3.86e8 | 65.47 |
CrII 2056.26 | 52 | −1030 ± 150∗∗ | 89.9 | no | 2056.25693 | 0.1030 | 4.07e8 | 52.06 |
CrII 2062.24 | 52 | −1168 ± 150∗∗ | 102 | no | 2062.23610 | 0.0759 | 4.06e8 | 52.06 |
CrII 2066.16 | 52 | −1360 ± 150∗∗ | 143 | no | 2066.16403 | 0.0512 | 4.17e8 | 52.06 |
FeII 2344.21 | 46 | 1540 ± 400∗ | 41.7 | no | 2344.2129601 | 0.1142 | 2.680e8 | 55.91 |
Transition | Order | Rest wav. | Measured wav. |
---|---|---|---|
Si 1808 | 60 | 1808.0126 | 5982.802286 |
Ni 1751 | 62 | 1751.91 | 5797.15603 |
Ni 1741 | 62 | 1741.549 | 5762.870976 |
Ni 1709 | 63 | 1709.6 | 5657.15017 |
Fe 1611 | 67 | 1608.45085 | 5322.492538718 |
Fe 1608 | 67 | 1611.20034 | 5331.5908210872 |
Lines from the 2003 Nature paper:
Transition | Observed wav. | Order |
---|---|---|
MnII 1197 | 3960.97 | |
KrI 1235 | 4086.71 | |
GeII 1237 | 4093.33 | |
MgII 1240 | 4103.26 | |
AsII 1263 | 4179.37 | |
CII 1347 | 4457.33 | |
OI 1355 | 4483.8 | |
CuII 1358 | 4493.73 | |
BII 1362 | 4506.97 | |
SnII 1400 | 4632.71 | |
GaII 1414 | 4679.04 | |
PbII 1433 | 4741.91 | |
GeII 1602 | 5301.15 | 67 |
Lines from 2003 Nature paper:
Transition | Observed wav. |
---|---|
MnII 1197 | 3960.97 |
KrI 1235 | 4086.71 |
GeII 1237 | 4093.33 |
MgII 1240 | 4103.26 |
AsII 1263 | 4179.37 |
CII 1347 | 4457.33 |
OI 1355 | 4483.8 |
CuII 1358 | 4493.73 |
BII 1362 | 4506.97 |
SnII 1400 | 4632.71 |
GaII 1414 | 4679.04 |
PbII 1433 | 4741.91 |
GeII 1602 | 5301.15 |
Previous Upper Limits
Transition | Process | Rest wav. | Measured wav. |
---|---|---|---|
O | SnII | 1355.6 | 4485.7468244 |
Sn | s | 1400.4 | 4633.9922 |
Pb | s | 1433.9 | 4744.845 |
Te | r | 1404.6 | 4647.8902 |
Art's Proposal Listed
To get the resolution we need a S/N of ~70
What we get
All | No I2 | I2 | |
---|---|---|---|
Combined | 345 | 345 | 345 |
S/N | 60 | 80 | 52 |