ASTROSAT CZTI

Data Quality Report

Orbit 20200813_A09_008T02_9000003810_level2

Creation date: 2021-01-09T07:01:54.639226
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev: 1121 $

Source files: Data quality report (detailed, human readable) | Data quality report (concise, machine readable)

Observation information


Basic statistics of files

Param Original file Final file
FilenamemodeM0/AS1A09_008T02_9000003810cztM0_level2_bc.evt modeM0/AS1A09_008T02_9000003810cztM0_level2_quad_clean.evt
Size (bytes)340,853,760125,285,760
Size325.1 MB 119.5 MB
Events in quadrant A1,553,691840,419
Events in quadrant B1,491,007875,181
Events in quadrant C1,942,732835,248
Events in quadrant D4,863,249767,594

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0143390
B0140940
C0159190
D0263060

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0130
B0130
C0130
D0130

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6831470.688040%
B6831210.307422%
C68312002.927829%
D6831104715.327185%

Noise dominated fraction

Noise dominated data is calculated using 1-second bins in cleaned event files. If a bin has >2000 counts, and if more than 50% of those come from <1% of pixels, then it is considered to be noise-dominated and hence unusable.

Quadrant # 1 sec bins Bins with >0 counts Bins with >2000 counts High rate bins dominated by noise Noise dominated (total time) Noise dominated (detector-on time) Marked lightcurve
A 8131 6832 6 6 0.07% 0.09%
B 8131 6831 0 0 0.00% 0.00%
C 8131 6831 11 11 0.14% 0.16%
D 8131 6831 253 253 3.11% 3.70%

Top noisy pixels

Top three noisy pixels from each quadrant. If the there are fewer than three noisy pixels in the level2.evt file, extra rows are filled as -1

Pixel properties Quadrant properties
Quadrant DetID PixID Counts Sigma Mean Median Sigma
A 0 13 117382 1435.8 371 364 81.5
A 13 254 9553 112.75 371 364 81.5
A 6 16 5734 65.89 371 364 81.5
B 0 230 27160 369.58 380 373 72.5
B 7 219 4828 61.47 380 373 72.5
B 15 222 3534 43.61 380 373 72.5
C 3 233 402258 4576.17 365 365 87.8
C 4 254 92619 1050.45 365 365 87.8
C 2 16 44676 504.55 365 365 87.8
D 7 80 2590382 31422.79 348 339 82.4
D 1 52 795239 9643.85 348 339 82.4
D 11 176 103904 1256.47 348 339 82.4

Detector plane histogram (DPH)

Histogram calculated using DETX and DETY for each event in the final _common_clean file

Quadrant A Quadrant B
Quadrant D Quadrant C

Count rate plots and images

Plot type Count rate plots Images
Comparison with Poisson distribution
Blue bars denote a histogram of data divided into 1 sec bins.
Red curve is a Poisson curve with rate = median count rate of data.
Quadrant-wise count rates
Data is divided into 100 sec bins
Module-wise count rates for Quadrant A
Data is divided into 100 sec bins
Module-wise count rates for Quadrant B
Data is divided into 100 sec bins
Module-wise count rates for Quadrant C
Data is divided into 100 sec bins
Module-wise count rates for Quadrant D
Data is divided into 100 sec bins

Housekeeping plots

Parameter Plot
CZT HV Monitor
D_VDD
Temperature 1
Veto HV Monitor
Veto LLD
Alpha Counter
_CPM_Rate
CZT Counter
+2.5 Volts monitor
+5 Volts monitor
_ROLL_ROT
_Roll_DEC
_Roll_RA
Veto Counter