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We used an incorrect value for the ICRF position of Sgr A* at the specified reference date to determine the relative position of the magnetar, PSR J1745-2900, in our analysis. The correct value for the Sgr A* position is 17h45m40.0366s, −29d00'28217 at epoch MJD = 56710. ICRF positions reported for the magnetar are correct as reported in the paper, but relative positions should be adjusted by (+18.36, −32.0) mas. This applies to individual epoch positions reported in columns 6 and 7 of Table 2 and the mean fitted positions reported in rows 1 and 2 of Table 4. For example, the correct fitted offset position using the proper motion bootstrap technique in Table 4 is +1700.53, −1679.41 mas. The relative positions in Figure 1 should be shifted by the same offset. Proper motion, acceleration, and core shift values are unaffected. There are no changes in the interpretation of the results.
Table 2. Observed Positions of PSR J1745-2900
MJD | Band | Flux Density | ICRF RA | ICRF Dec. | ||
---|---|---|---|---|---|---|
(mJy) | (J2000) | (J2000) | (mas) | (mas) | ||
56422 | X | 0.56 | 17 45 40.166377 ± 0.000020 | −29 00 29.8960 ± 00.0002 | 1699.97 ± 0.26 | −1683.38 ± 0.20 |
56444 | X | 0.76 | 17 45 40.166327 ± 0.000012 | −29 00 29.8962 ± 00.0001 | 1699.50 ± 0.16 | −1683.24 ± 0.10 |
56473 | Ku | 0.58 | 17 45 40.166263 ± 0.000008 | −29 00 29.8962 ± 00.0001 | 1698.91 ± 0.10 | −1682.80 ± 0.10 |
56486 | X | 1.47 | 17 45 40.166222 ± 0.000008 | −29 00 29.8965 ± 00.0001 | 1698.49 ± 0.10 | −1682.90 ± 0.10 |
56658 | Ku | 2.09 | 17 45 40.166264 ± 0.000007 | −29 00 29.8960 ± 00.0001 | 1700.52 ± 0.09 | −1679.79 ± 0.10 |
... | X | 1.18 | 17 45 40.166276 ± 0.000010 | −29 00 29.8960 ± 00.0001 | 1700.68 ± 0.13 | −1679.79 ± 0.10 |
56710 | Ku | 1.07 | 17 45 40.166249 ± 0.000005 | −29 00 29.8960 ± 00.0001 | 1700.77 ± 0.07 | −1679.00 ± 0.10 |
... | X | 0.94 | 17 45 40.166237 ± 0.000014 | −29 00 29.8962 ± 00.0002 | 1700.62 ± 0.18 | −1679.20 ± 0.20 |
56750 | K | 0.92 | 17 45 40.166235 ± 0.000004 | −29 00 29.8961 ± 00.0001 | 1700.94 ± 0.05 | −1678.49 ± 0.10 |
... | Q | 0.54 | 17 45 40.166238 ± 0.000003 | −29 00 29.8959 ± 00.0001 | 1700.98 ± 0.04 | −1678.29 ± 0.10 |
56772 | X | 1.00 | 17 45 40.166246 ± 0.000016 | −29 00 29.8958 ± 00.0002 | 1701.27 ± 0.21 | −1677.86 ± 0.20 |
... | Ku | 1.22 | 17 45 40.166204 ± 0.000008 | −29 00 29.8961 ± 00.0001 | 1700.72 ± 0.10 | −1678.16 ± 0.10 |
56892 | Ku | 0.63 | 17 45 40.166196 ± 0.000028 | −29 00 29.8959 ± 00.0003 | 1701.65 ± 0.37 | −1676.15 ± 0.30 |
56899 | K | 0.26 | 17 45 40.166250 ± 0.000025 | −29 00 29.8959 ± 00.0003 | 1702.42 ± 0.33 | −1676.06 ± 0.30 |
... | Q | 0.15 | 17 45 40.166215 ± 0.000005 | −29 00 29.8958 ± 00.0001 | 1701.95 ± 0.07 | −1675.90 ± 0.10 |
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Table 4. Proper Motion Fits for PSR J1745-2900
Parameter | Units | PM Bootstrap | PM LSQ | PM + Accel. | PM + Core Shift |
---|---|---|---|---|---|
(mas) | 1700.53 ± 0.07 | 1700.52 ± 0.07 | 1700.54 ± 0.09 | 1700.52 ± 0.19 | |
(mas) | −1679.41 ± 0.03 | −1679.41 ± 0.03 | −1679.42 ± 0.05 | −1679.35 ± 0.10 | |
(mas/yr) | 2.45 ± 0.33 | 2.50 ± 0.22 | 2.49 ± 0.23 | 2.51 ± 0.31 | |
(mas/yr) | 5.88 ± 0.11 | 5.90 ± 0.09 | 5.92 ± 0.10 | 5.84 ± 0.12 | |
aα | (mas/yr2) | ... | ... | −0.2 ± 1.0 | ... |
aδ | (mas/yr2) | ... | ... | 0.2 ± 0.5 | ... |
(mas/cm) | ... | ... | ... | −0.00 ± 0.10 | |
(mas/cm) | ... | ... | ... | 0.03 ± 0.05 | |
... | ... | 112.3/13 | 111.8/12 | 112.3/12 | |
... | ... | 17.0/13 | 16.8/12 | 16.5/12 |
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