We report a summary of X-ray observations of the Fast Blue Optical Transient (FBOT) AT2022tsd with the Chandra X-ray Observatory (CXO) and the Neil Gehrels Swift Observatory X-ray Telescope (Swift-XRT). AT2022tsd was first detected in the X-rays on October 4th 2022 by Swift-XRT (Schulze+ 2022, AstroNote #207), with additional follow-up continuing through December 16th 2022 (Swift Obs IDs 00015367001 - 00015367014). We acquired five epochs of CXO observations under Chandra program #24500280 (PI Matthews, Obs IDs 26641 - 26645), and an additional epoch was obtained through a Chandra DDT (PI Ho, program #503444, joint fit of Obs IDs 27639 & 27643). Our data reduction methods are described in Matthews+ 2023.
MJD Obs |
Trest (days) |
Exposure Time (ks) |
Absorbed Flux (1E-13 erg/cm2/s) |
Abs Flux Err+ |
Abs Flux Err- |
Unabsorbed Flux (1E-13 erg/cm2/s) |
Unabs Flux Err+ |
Unabs Flux Err- |
Telescope / Instrument |
PI |
59856.7 | 22.8 | 3.7 | 5.24 | 1.04 | 1.04 | 7.47 | 1.47 | 1.47 | Swift/XRT | Schulze |
59858.9 | 24.6 | 3.8 | 4.15 | 0.88 | 0.88 | 5.92 | 1.26 | 1.26 | Swift/XRT | Schulze |
59860.5 | 25.8 | 2.5 | 4.17 | 1.11 | 1.11 | 5.94 | 1.57 | 1.57 | Swift/XRT | Schulze |
59861.6 | 26.7 | 2.3 | 5.06 | 1.54 | 1.29 | 7.22 | 2.20 | 1.84 | Swift/XRT | Schulze |
59862.5 | 27.5 | 2.4 | 2.82 | 1.45 | 1.1 | 4.03 | 2.06 | 1.57 | Swift/XRT | Schulze |
59869.1 | 32.7 | 19.3 | 2.35 | 0.16 | 0.15 | 3.81 | 1.34 | 1.09 | CXO/ACIS-S | Matthews |
59878.2 | 40 | 2.8 | 2.78 | 0.97 | 0.79 | 1.33 | 0.71 | 0.54 | Swift/XRT | Schulze |
59880 | 41.4 | 19.8 | 1.6 | 0.14 | 0.13 | 2.61 | 1.45 | 1.07 | CXO/ACIS-S | Matthews |
59887.6 | 47.5 | 18.8 | 1.18 | 0.1 | 0.13 | 0.94 | 0.58 | 0.43 | CXO/ACIS-S | Matthews |
59889.2 | 48.7 | 4.4 | 0.97 | 0.51 | 0.39 | 2.75 | 0.19 | 0.18 | Swift/XRT | Schulze |
59900.5 | 57.7 | 2 | 1.91 | 1.05 | 0.78 | 1.96 | 0.16 | 0.15 | Swift/XRT | Schulze |
59905.4 | 61.6 | 18.1 | 1.41 | 0.12 | 0.13 | 1.45 | 0.14 | 0.13 | CXO/ACIS-S | Matthews |
59914.2 | 68.7 | 5.8 | 0.69 | 0.42 | 0.31 | 1.72 | 0.16 | 0.15 | Swift/XRT | Schulze |
59941.1 | 90 | 37.8 | 0.39 | 0.05 | 0.04 | 0.47 | 0.06 | 0.05 | CXO/ACIS-S | Ho |
59974.9 | 117 | 39.6 | 0.17 | 0.03 | 0.03 | 0.20 | 0.04 | 0.03 | CXO/ACIS-S | Matthews |
Catalog | Name | Reported RA | Reported DEC | Reported Obj-Type | Reported Redshift | Host Name | Host Redshift | Remarks | TNS RA | TNS DEC | TNS Obj-Type | TNS Redshift |
---|---|---|---|---|---|---|---|---|---|---|---|---|
TNS | 2022tsd [ZTF22abftjko] | 03:20:10.863 | +08:44:55.63 | 03:20:10.863 | +08:44:55.63 |
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