Table 2
Upper limits on the CO column density in the six H2 bearing GRB DLAs as well as the N(CO)/N(H2) ratios.
| GRB | log N(CO) | N(CO)/N(H2) |
|---|---|---|
| yymmdd# | AX(0–0) to (5–0) | |
| 120327A | <15.3 | <10−2.1 |
| 120815A | <15.0 | <10−5.4 |
| 120909A | <14.2 | <10−3.2 |
| 121024A | <14.4 | <10−5.5 |
| 141109A | <15.9 | <10−2.1 |
| 150403A | <14.9 | <10−5.0 |
| 080607 | 16.5 ± 0.3 | ~10−4.7 |
Notes. Also, listed are the values for GRB 080607 as taken from Prochaska et al. (2009). The CO upper limits (3-σ) were determined assuming b = 2.0 km s−1 as a conservative value. In case of GRB 120327A, 120909A and 141109A, the N(CO)/N(H2) ratio was determined taking the H2 column densities measured for b = 2.0 km s−1 as given in Table A.2.
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