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An imaging apparatus includes sensor arrays each having a plurality of subarrays having a plurality of sensors which output signals based on radiation or light, and a plurality of temperature sensors which output signals based on temperatures of the sensor arrays. In this case, a signal output from

An imaging apparatus includes sensor arrays each having a plurality of subarrays having a plurality of sensors which output signals based on radiation or light, and a plurality of temperature sensors which output signals based on temperatures of the sensor arrays. In this case, a signal output from one subarray of the plurality of subarrays and a signal of one temperature sensor of the plurality of temperature sensors are read out through a line to which the sensor included in the one subarray and the one temperature sensor are commonly connected.

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1. An imaging apparatus comprising: a sensor array having a plurality of subarrays each having a plurality of sensors, each of the plurality of sensors comprising a conversion element converting radiation or light to charges and outputting signals based on the charges; anda plurality of temperature

1. An imaging apparatus comprising: a sensor array having a plurality of subarrays each having a plurality of sensors, each of the plurality of sensors comprising a conversion element converting radiation or light to charges and outputting signals based on the charges; anda plurality of temperature sensors which output signals based on temperatures of the sensor array,wherein a signal output from one subarray of the plurality of subarrays and a signal of one temperature sensor of the plurality of temperature sensors are read out through a line to which one sensor included in the one subarray and the one temperature sensor are commonly connected. 2. The imaging apparatus according to claim 1, further comprising a control unit configured to control the sensor array and the temperature sensors. 3. The imaging apparatus according to claim 2, wherein the control unit controls the sensor array and the temperature sensor such that signals may be read out from the temperature sensor for each one frame in a period for reading out signals from reading target sensors for one frame in the sensor array. 4. The imaging apparatus according to claim 2, wherein the temperature sensor includes at least one or a plurality of diodes. 5. The imaging apparatus according to claim 4, wherein the diodes receive forward voltage; andthe control unit calculates the amount of change in temperature of the sensor array or temperature of the sensor array based on a signal based on the forward voltage in the diodes. 6. The imaging apparatus according to claim 4, wherein the temperature sensor has a signal amplification unit configured to amplify signals of the diodes and a signal holding unit configured to hold a signal output from the signal amplification unit. 7. The imaging apparatus according to claim 6, wherein the temperature sensor further has a second signal amplification unit different from the signal holding unit, the second signal amplification unit amplifying a reference signal which is a reference for a temperature of the sensor array, and a reference holding unit configured to hold a signal output from the second signal amplification unit. 8. The imaging apparatus according to claim 6, wherein the signal amplification unit includes at least one transistor. 9. The imaging apparatus according to claim 1, wherein the subarrays and the temperature sensors are placed on a common semiconductor substrate; and the temperature sensors are placed in a region different from a region where the subarrays are placed on the semiconductor substrate. 10. The imaging apparatus according to claim 1, further comprising a signal reading unit configured to read out signals from the sensor arrays and signals from the temperature sensors through the line. 11. The imaging apparatus according to claim 1, further comprising a row scanning circuit configured to scan a plurality of sensors in the subarray row by row, wherein the subarray has the plurality of sensors placed in a matrix; andthe row scanning circuit commonly scans the sensors and the temperature sensors of a predetermined row. 12. The imaging apparatus according to claim 1, wherein a plurality of the temperature sensors are placed in the subarray. 13. The imaging apparatus according to claim 2, wherein the control unit controls such that whether a signal based on an amount of change of the temperature of the sensor array can be read out from the temperature sensor may be determined based on a signal different from a signal for shifting the sensor array to an operating state. 14. An imaging system comprising: the imaging apparatus according to claim 1; anda processing unit configured to process an image captured by the imaging apparatus.