Table 1.
Journal of observations.
| Epoch | Date | TST | Grism+ | R | # | Texp | Seeing | Airmass | X-ray state |
|---|---|---|---|---|---|---|---|---|---|
| (dd/mm) | (d) | slit width (″) | λ/Δλ | (s) | (″) | ||||
| E1 | 26/08 | 2.293 | R1000B+0.8 | 1180 | 4 | 150 | 0.9 | 1.44 | Hard |
| E2 | 27/08 | 3.312 | R1000B+0.8 | 1180 | 18 | 150 | 1.2 | 1.51 | Hard |
| E3 | 30/08 | 6.306 | R1000B+0.6 | 1230 | 3 | 150 | 1.2 | 1.51 | Hard |
| E4 | 02/09 | 9.312 | R2500R/R2000B+0.8 | 2830/2420 | 1,1 | 250 | 1.3 | 1.56 | HIMS |
| E5 | 04/09 | 11.303 | R2500I/R/U+0.8 | 2800/2940/1900 | 1/1/1 | 250 | 1.0 | 1.54 | HIMS |
| E6 | 05/09 | 12.298 | R2500R/V/U+0.8 | 2970/3220/1900 | 1/1/1 | 250 | 0.8 | 1.54 | HIMS |
| E7 | 06/09 | 13.347 | R2500R/V/U+0.8 | 3060/3190/1900 | 1/1/1 | 250 | 0.9 | 1.94 | HIMS |
| E8 | 09/09 | 16.269 | R2500R/V/U+0.8 | 2880/3230/1900 | 1/1/1 | 250 | 1.1 | 1.47 | HIMS |
| E9 | 10/09 | 17.299 | R2500R/V/U+0.8 | 2970/3190/1900 | 1/1/1 | 250 | 0.9 | 1.61 | HIMS |
| E10 | 21/09 | 28.275 | R2500R/R2000B+0.8 | 2970/2520 | 1/1 | 250 | 1.3 | 1.65 | HIMS |
| E11 | 22/09 | 29.307 | R2500R/R2000B+0.8 | 2970/2520 | 1/1 | 250 | 1.4 | 1.98 | HIMS |
| E12 | 24/09 | 31.276 | R2500R/R2000B+0.8 | 2940/2480 | 1/1 | 250 | 1.3 | 1.71 | HIMS |
| E13 | 27/09 | 34.287 | R2500R/R2000B+0.8 | 3030/2540 | 1/1 | 250 | 1.8 | 1.82 | HIMS |
| E14 | 01/10 | 38.286 | R2500R/R2000B+0.8 | 3060/2560 | 1/1 | 250 | 0.9 | 2.03 | HIMS |
| E15 | 05/10 | 42.276 | R2500R/R2000B+0.8 | 3000/2600 | 1/1 | 250 | 1.0 | 2.06 | SIMS |
| E16 | 06/10 | 43.251 | R2500R/R2000B+0.8 | 2970/2560 | 1/1 | 250 | 1.1 | 1.83 | SIMS |
| E17 | 09/10 | 46.252 | R2500R/R2000B+0.8 | 2970/2650 | 1/1 | 250 | 0.9 | 1.89 | HIMS |
| E18 | 11/10 | 48.263 | R2500R/R2000B+0.8 | 3030/2560 | 1/1 | 250 | 1.0 | 2.13 | HIMS |
| E19 | 13/10 | 50.236 | R2500R/R2000B+0.8 | 2860/2540 | 1/1 | 250 | 1.3 | 1.83 | HIMS |
| E20 | 24/10 | 61.228 | R2500R/R2000B+0.8 | 2830/2460 | 1/1 | 250 | 2.3 | 2.13 | Soft |
Notes. TST stands for ‘time since trigger’, defined as the difference between the mid-exposure MJD of each spectroscopic epoch and the Swift discovery trigger at MJD 60180.5831 (2023-08-24 13:59:44 UTC; Page et al. 2023). We employed a 0.6″ or 0.8″ slit width and a number of grisms, each covering a different wavelength range: R1000B (3600 − 7800 Å), R2000B (3940 − 5680 Å), R2500U (3420 − 4600 Å), R2500V (4420 − 6050 Å), R2500R (5560 − 7670 Å), and R2500I (7300 − 10140 Å). The spectral resolution was measured from lines in the comparison arc lamps. The number of exposures per epoch (#) and their individual exposure times (Texp) are also reported.
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.