Example Ion File
Below is an example ion file for the damped Lya system
toward Quasar Q0201+36.
1215.6701 20.3800 0.0450 1 0
1550.7700 14.6116 0.0047 0 1
1670.7874 14.1329 0.2008 3 1
1862.7895 13.6012 0.0075 0 1
1808.0126 15.5338 0.0097 1 1
1393.7550 14.0714 0.0059 2 1
1910.6000 12.1959 0.1370 1 1
2056.2539 13.2659 0.0298 1 1
2066.1610 13.1323 0.0943 1 1
1608.4511 15.0098 0.0036 1 1
2012.1664 12.9571 0.1448 5 1
1454.8420 13.6687 0.0727 0 1
1709.6000 14.0798 0.0208 1 1
1741.5490 14.0206 0.0135 1 1
1751.9100 13.9839 0.0211 1 1
The columns are as follows:
- Column 1: Rest wavelength
- Column 2: Log10 of the Ionic column density
- Column 3: 1 sigma error of Log10(N)
- Column 4: Flag describing the measurement. It is the sum
of three flags:
- A: 0 = Not included in elemental abundance, 1 = Included
- B: 0 = Measurement, 2 = Lower limit, 4 = Upper limit
- C: 0 = Measured with AODM, 8 = Literature value or Voigt fit
For example, flag = 5 means it is an upper limit, it is
included in the analysis of the elemental abundance for this element,
and it was measured with the AODM. Meanwhile flag = 0 means it is
a measured value with AODM but it is not included in the elemental
abundance.
- Column 5: Flag describing the dataset.
- 0 = Reserved for N(HI)
- 1 = HIRES measurement
- 2 = ESI measurement
- 65 = HIRES by someone other than me
- 66 = ESI by someone other than me
e-mail: xavier@ucolick.org
last modified 3/11/03