Best-fitting model results for pre-burst X-ray spectra of Aql X-1 using an absorbed disc blackbody plus a power-law model.
| Burst no. . | kT . | NormDBB . | Γ . | Fluxa . | χ2 / dof . |
|---|---|---|---|---|---|
| . | (keV) . | (R|$^2_{\rm km}/\rm {\it D}_{10 {\rm kpc}}^{2}$|) . | . | (× 10−9 erg s−1 cm−2) . | . |
| 1 | 0.87 ± 0.10 | 12.3 ± 7.0 | 1.14 ± 0.07 | 1.4 ± 0.2 | 374.88 / 280 |
| 2 | 1.26 ± 0.17 | 5.0 ± 2.3 | 1.31 ± 0.04 | 1.6 ± 0.2 | 316.26 / 299 |
| 3 | 0.62 ± 0.01 | 473 ± 38 | 1.63 ± 0.03 | 3.5 ± 0.2 | 410.70 / 391 |
| 4 | 0.42 ± 0.01 | 859 ± 118 | 1.74 ± 0.03 | 2.6 ± 0.1 | 353.22 / 351 |
| 5 | 0.45 ± 0.01 | 698 ± 105 | 1.74 ± 0.03 | 2.6 ± 0.2 | 368.72 / 354 |
| 6 | 0.32 ± 0.02 | 969 ± 307 | 1.82 ± 0.03 | 1.8 ± 0.1 | 384.25 / 306 |
| 7 | 0.28 ± 0.02 | 1446 ± 484 | 1.85 ± 0.03 | 1.8 ± 0.1 | 322.44 / 302 |
| 8 | 0.27 ± 0.05 | 1086 ± 741 | 1.82 ± 0.03 | 1.7 ± 0.1 | 352.52 / 296 |
| 9 | 2.24 ± 0.12 | 1.3 ± 0.4 | 2.18 ± 0.10 | 1.3 ± 0.2 | 359.42 / 280 |
| 10 | 2.01 ± 0.09 | 2.0 ± 0.5 | 2.18 ± 0.19 | 1.1 ± 0.2 | 267.50 / 245 |
| 11 | 2.13 ± 0.12 | 1.4 ± 0.4 | 2.06 ± 0.14 | 1.1 ± 0.2 | 263.39 / 236 |
| 12 | 1.86 ± 0.08 | 2.6 ± 0.6 | 2.20 ± 0.21 | 1.0 ± 0.2 | 266.16 / 226 |
| 13 | 2.49 ± 0.13 | 1.2 ± 0.3 | 2.13 ± 0.09 | 1.6 ± 0.3 | 282.28 / 302 |
| 14 | 0.16 ± 0.03 | 9121 ± 9154 | 1.74 ± 0.02 | 1.8 ± 0.1 | 282.22 / 303 |
| 15 | 2.51 ± 0.12 | 1.4 ± 0.3 | 2.2 ± 0.09 | 1.8 ± 0.4 | 347.39 / 325 |
| 16 | 2.54 ± 0.12 | 1.3 ± 0.3 | 2.1 ± 0.09 | 1.9 ± 0.3 | 361.09 / 327 |
| 17 | 2.40 ± 0.24 | 0.7 ± 0.3 | 1.9 ± 0.07 | 1.9 ± 0.3 | 352.93 / 325 |
| 18 | 0.46 ± 0.01 | 722 ± 72 | 1.73 ± 0.06 | 1.5 ± 0.1 | 317.81 / 270 |
| 19 | 0.37 ± 0.02 | 659 ± 168 | 1.79 ± 0.03 | 2.0 ± 0.1 | 388.55 / 321 |
| 20 | 1.26 ± 0.02 | 108.5 ± 6.4 | 1.33 ± 0.03 | 10.0 ± 0.4 | 728.50 / 567 |
| 21 | 1.44 ± 0.33 | 1.2 ± 0.9 | 2.10 ± 0.06 | 1.0 ± 0.1 | 234.11 / 246 |
| 22 | 1.12 ± 0.47 | 1.7 ± 4.6 | 2.06 ± 0.05 | 1.0 ± 0.1 | 253.96 / 244 |
| Burst no. . | kT . | NormDBB . | Γ . | Fluxa . | χ2 / dof . |
|---|---|---|---|---|---|
| . | (keV) . | (R|$^2_{\rm km}/\rm {\it D}_{10 {\rm kpc}}^{2}$|) . | . | (× 10−9 erg s−1 cm−2) . | . |
| 1 | 0.87 ± 0.10 | 12.3 ± 7.0 | 1.14 ± 0.07 | 1.4 ± 0.2 | 374.88 / 280 |
| 2 | 1.26 ± 0.17 | 5.0 ± 2.3 | 1.31 ± 0.04 | 1.6 ± 0.2 | 316.26 / 299 |
| 3 | 0.62 ± 0.01 | 473 ± 38 | 1.63 ± 0.03 | 3.5 ± 0.2 | 410.70 / 391 |
| 4 | 0.42 ± 0.01 | 859 ± 118 | 1.74 ± 0.03 | 2.6 ± 0.1 | 353.22 / 351 |
| 5 | 0.45 ± 0.01 | 698 ± 105 | 1.74 ± 0.03 | 2.6 ± 0.2 | 368.72 / 354 |
| 6 | 0.32 ± 0.02 | 969 ± 307 | 1.82 ± 0.03 | 1.8 ± 0.1 | 384.25 / 306 |
| 7 | 0.28 ± 0.02 | 1446 ± 484 | 1.85 ± 0.03 | 1.8 ± 0.1 | 322.44 / 302 |
| 8 | 0.27 ± 0.05 | 1086 ± 741 | 1.82 ± 0.03 | 1.7 ± 0.1 | 352.52 / 296 |
| 9 | 2.24 ± 0.12 | 1.3 ± 0.4 | 2.18 ± 0.10 | 1.3 ± 0.2 | 359.42 / 280 |
| 10 | 2.01 ± 0.09 | 2.0 ± 0.5 | 2.18 ± 0.19 | 1.1 ± 0.2 | 267.50 / 245 |
| 11 | 2.13 ± 0.12 | 1.4 ± 0.4 | 2.06 ± 0.14 | 1.1 ± 0.2 | 263.39 / 236 |
| 12 | 1.86 ± 0.08 | 2.6 ± 0.6 | 2.20 ± 0.21 | 1.0 ± 0.2 | 266.16 / 226 |
| 13 | 2.49 ± 0.13 | 1.2 ± 0.3 | 2.13 ± 0.09 | 1.6 ± 0.3 | 282.28 / 302 |
| 14 | 0.16 ± 0.03 | 9121 ± 9154 | 1.74 ± 0.02 | 1.8 ± 0.1 | 282.22 / 303 |
| 15 | 2.51 ± 0.12 | 1.4 ± 0.3 | 2.2 ± 0.09 | 1.8 ± 0.4 | 347.39 / 325 |
| 16 | 2.54 ± 0.12 | 1.3 ± 0.3 | 2.1 ± 0.09 | 1.9 ± 0.3 | 361.09 / 327 |
| 17 | 2.40 ± 0.24 | 0.7 ± 0.3 | 1.9 ± 0.07 | 1.9 ± 0.3 | 352.93 / 325 |
| 18 | 0.46 ± 0.01 | 722 ± 72 | 1.73 ± 0.06 | 1.5 ± 0.1 | 317.81 / 270 |
| 19 | 0.37 ± 0.02 | 659 ± 168 | 1.79 ± 0.03 | 2.0 ± 0.1 | 388.55 / 321 |
| 20 | 1.26 ± 0.02 | 108.5 ± 6.4 | 1.33 ± 0.03 | 10.0 ± 0.4 | 728.50 / 567 |
| 21 | 1.44 ± 0.33 | 1.2 ± 0.9 | 2.10 ± 0.06 | 1.0 ± 0.1 | 234.11 / 246 |
| 22 | 1.12 ± 0.47 | 1.7 ± 4.6 | 2.06 ± 0.05 | 1.0 ± 0.1 | 253.96 / 244 |
Unabsorbed 0.5−10 keV flux.
Best-fitting model results for pre-burst X-ray spectra of Aql X-1 using an absorbed disc blackbody plus a power-law model.
| Burst no. . | kT . | NormDBB . | Γ . | Fluxa . | χ2 / dof . |
|---|---|---|---|---|---|
| . | (keV) . | (R|$^2_{\rm km}/\rm {\it D}_{10 {\rm kpc}}^{2}$|) . | . | (× 10−9 erg s−1 cm−2) . | . |
| 1 | 0.87 ± 0.10 | 12.3 ± 7.0 | 1.14 ± 0.07 | 1.4 ± 0.2 | 374.88 / 280 |
| 2 | 1.26 ± 0.17 | 5.0 ± 2.3 | 1.31 ± 0.04 | 1.6 ± 0.2 | 316.26 / 299 |
| 3 | 0.62 ± 0.01 | 473 ± 38 | 1.63 ± 0.03 | 3.5 ± 0.2 | 410.70 / 391 |
| 4 | 0.42 ± 0.01 | 859 ± 118 | 1.74 ± 0.03 | 2.6 ± 0.1 | 353.22 / 351 |
| 5 | 0.45 ± 0.01 | 698 ± 105 | 1.74 ± 0.03 | 2.6 ± 0.2 | 368.72 / 354 |
| 6 | 0.32 ± 0.02 | 969 ± 307 | 1.82 ± 0.03 | 1.8 ± 0.1 | 384.25 / 306 |
| 7 | 0.28 ± 0.02 | 1446 ± 484 | 1.85 ± 0.03 | 1.8 ± 0.1 | 322.44 / 302 |
| 8 | 0.27 ± 0.05 | 1086 ± 741 | 1.82 ± 0.03 | 1.7 ± 0.1 | 352.52 / 296 |
| 9 | 2.24 ± 0.12 | 1.3 ± 0.4 | 2.18 ± 0.10 | 1.3 ± 0.2 | 359.42 / 280 |
| 10 | 2.01 ± 0.09 | 2.0 ± 0.5 | 2.18 ± 0.19 | 1.1 ± 0.2 | 267.50 / 245 |
| 11 | 2.13 ± 0.12 | 1.4 ± 0.4 | 2.06 ± 0.14 | 1.1 ± 0.2 | 263.39 / 236 |
| 12 | 1.86 ± 0.08 | 2.6 ± 0.6 | 2.20 ± 0.21 | 1.0 ± 0.2 | 266.16 / 226 |
| 13 | 2.49 ± 0.13 | 1.2 ± 0.3 | 2.13 ± 0.09 | 1.6 ± 0.3 | 282.28 / 302 |
| 14 | 0.16 ± 0.03 | 9121 ± 9154 | 1.74 ± 0.02 | 1.8 ± 0.1 | 282.22 / 303 |
| 15 | 2.51 ± 0.12 | 1.4 ± 0.3 | 2.2 ± 0.09 | 1.8 ± 0.4 | 347.39 / 325 |
| 16 | 2.54 ± 0.12 | 1.3 ± 0.3 | 2.1 ± 0.09 | 1.9 ± 0.3 | 361.09 / 327 |
| 17 | 2.40 ± 0.24 | 0.7 ± 0.3 | 1.9 ± 0.07 | 1.9 ± 0.3 | 352.93 / 325 |
| 18 | 0.46 ± 0.01 | 722 ± 72 | 1.73 ± 0.06 | 1.5 ± 0.1 | 317.81 / 270 |
| 19 | 0.37 ± 0.02 | 659 ± 168 | 1.79 ± 0.03 | 2.0 ± 0.1 | 388.55 / 321 |
| 20 | 1.26 ± 0.02 | 108.5 ± 6.4 | 1.33 ± 0.03 | 10.0 ± 0.4 | 728.50 / 567 |
| 21 | 1.44 ± 0.33 | 1.2 ± 0.9 | 2.10 ± 0.06 | 1.0 ± 0.1 | 234.11 / 246 |
| 22 | 1.12 ± 0.47 | 1.7 ± 4.6 | 2.06 ± 0.05 | 1.0 ± 0.1 | 253.96 / 244 |
| Burst no. . | kT . | NormDBB . | Γ . | Fluxa . | χ2 / dof . |
|---|---|---|---|---|---|
| . | (keV) . | (R|$^2_{\rm km}/\rm {\it D}_{10 {\rm kpc}}^{2}$|) . | . | (× 10−9 erg s−1 cm−2) . | . |
| 1 | 0.87 ± 0.10 | 12.3 ± 7.0 | 1.14 ± 0.07 | 1.4 ± 0.2 | 374.88 / 280 |
| 2 | 1.26 ± 0.17 | 5.0 ± 2.3 | 1.31 ± 0.04 | 1.6 ± 0.2 | 316.26 / 299 |
| 3 | 0.62 ± 0.01 | 473 ± 38 | 1.63 ± 0.03 | 3.5 ± 0.2 | 410.70 / 391 |
| 4 | 0.42 ± 0.01 | 859 ± 118 | 1.74 ± 0.03 | 2.6 ± 0.1 | 353.22 / 351 |
| 5 | 0.45 ± 0.01 | 698 ± 105 | 1.74 ± 0.03 | 2.6 ± 0.2 | 368.72 / 354 |
| 6 | 0.32 ± 0.02 | 969 ± 307 | 1.82 ± 0.03 | 1.8 ± 0.1 | 384.25 / 306 |
| 7 | 0.28 ± 0.02 | 1446 ± 484 | 1.85 ± 0.03 | 1.8 ± 0.1 | 322.44 / 302 |
| 8 | 0.27 ± 0.05 | 1086 ± 741 | 1.82 ± 0.03 | 1.7 ± 0.1 | 352.52 / 296 |
| 9 | 2.24 ± 0.12 | 1.3 ± 0.4 | 2.18 ± 0.10 | 1.3 ± 0.2 | 359.42 / 280 |
| 10 | 2.01 ± 0.09 | 2.0 ± 0.5 | 2.18 ± 0.19 | 1.1 ± 0.2 | 267.50 / 245 |
| 11 | 2.13 ± 0.12 | 1.4 ± 0.4 | 2.06 ± 0.14 | 1.1 ± 0.2 | 263.39 / 236 |
| 12 | 1.86 ± 0.08 | 2.6 ± 0.6 | 2.20 ± 0.21 | 1.0 ± 0.2 | 266.16 / 226 |
| 13 | 2.49 ± 0.13 | 1.2 ± 0.3 | 2.13 ± 0.09 | 1.6 ± 0.3 | 282.28 / 302 |
| 14 | 0.16 ± 0.03 | 9121 ± 9154 | 1.74 ± 0.02 | 1.8 ± 0.1 | 282.22 / 303 |
| 15 | 2.51 ± 0.12 | 1.4 ± 0.3 | 2.2 ± 0.09 | 1.8 ± 0.4 | 347.39 / 325 |
| 16 | 2.54 ± 0.12 | 1.3 ± 0.3 | 2.1 ± 0.09 | 1.9 ± 0.3 | 361.09 / 327 |
| 17 | 2.40 ± 0.24 | 0.7 ± 0.3 | 1.9 ± 0.07 | 1.9 ± 0.3 | 352.93 / 325 |
| 18 | 0.46 ± 0.01 | 722 ± 72 | 1.73 ± 0.06 | 1.5 ± 0.1 | 317.81 / 270 |
| 19 | 0.37 ± 0.02 | 659 ± 168 | 1.79 ± 0.03 | 2.0 ± 0.1 | 388.55 / 321 |
| 20 | 1.26 ± 0.02 | 108.5 ± 6.4 | 1.33 ± 0.03 | 10.0 ± 0.4 | 728.50 / 567 |
| 21 | 1.44 ± 0.33 | 1.2 ± 0.9 | 2.10 ± 0.06 | 1.0 ± 0.1 | 234.11 / 246 |
| 22 | 1.12 ± 0.47 | 1.7 ± 4.6 | 2.06 ± 0.05 | 1.0 ± 0.1 | 253.96 / 244 |
Unabsorbed 0.5−10 keV flux.
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