Table 1.
Chandra observations of M 82.
| Period | Date | ObsID | ACIS | Exp. | θ | ϕ |
|---|---|---|---|---|---|---|
| I | 1999-09-20 | 361 | I3 | 33 | 0.3 | 26 |
| 1999-09-20 | 1302 | I3 | 15 | 0.3 | 26 | |
| 2002-06-18 | 2933 | S3 | 18 | 0.6 | 1 | |
| II | 2009-06-24 | 10542 | S3 | 118 | 1.4 | 223 |
| 2009-07-01 | 10543 | S3 | 118 | 1.1 | 179 | |
| 2009-07-07 | 10925 | S3 | 45 | 2.6 | 21 | |
| 2009-07-08 | 10544 | S3 | 74 | 2.6 | 21 | |
| III | 2010-06-17 | 11104 | S3 | 10 | 0.4 | 50 |
| 2010-07-20 | 11800 | S3 | 17 | 2.7 | 1 | |
| 2010-07-23 | 10545 | S3 | 95 | 2.7 | 8 | |
| IV | 2012-08-09 | 13796 | S3 | 20 | 0.3 | 169 |
| 2014-02-03 | 16580 | S3 | 47 | 1.2 | 323 | |
| 2015-01-20 | 16023 | S3 | 10 | 1.2 | 356 |
Notes. Period: the four separate periods of observations defined in the text. Date: the date when each observation started. ACIS: the ACIS CCD chip on which the central part of the M 82 was placed. Exp.: useful exposure time in units of 103 seconds. θ, ϕ: Off-axis angle in arcminutes and roll angle in degrees of the central position of Fig. 1 in each observation.
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