ASTROSAT CZTI

Data Quality Report

Orbit 20220104_T04_091T01_9000004842_level2

Creation date: 2022-01-07T10:00:58.059637
Switch to: Orbit-wise | Merged OBSID-wise
web.py, SVN revision $Rev$

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/AS1T04_091T01_9000004842cztM0_level2_bc.evt modeM0/AS1T04_091T01_9000004842cztM0_level2_quad_clean.evt
Size (bytes)3,323,471,040619,911,360
Size3.1 GB 591.2 MB
Events in quadrant A19,417,6243,524,013
Events in quadrant B20,817,1903,964,643
Events in quadrant C16,967,8873,989,280
Events in quadrant D39,844,6363,656,149

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010860
B010780
C010780
D010800

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02050
B02050
C02060
D02060

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01617570
B01448190
C01244890
D02122480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A53109706413.300947%
B5302739017.356630%
C530846711.264034%
D52963714513.490550%

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 75520 52782 198 198 0.26% 0.38%
B 75520 53203 720 720 0.95% 1.35%
C 75520 53260 116 116 0.15% 0.22%
D 75520 53050 739 739 0.98% 1.39%

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 15 169 8965512 15882.1 2567 2533 564.3
A 7 16 392506 691.02 2567 2533 564.3
A 13 254 76448 130.97 2567 2533 564.3
B 5 172 4506018 8400.3 2744 2686 536.1
B 4 251 3837893 7154.01 2744 2686 536.1
B 0 219 360219 666.92 2744 2686 536.1
C 15 214 2189024 3501.15 2758 2737 624.4
C 0 10 1502188 2401.24 2758 2737 624.4
C 0 207 1141629 1823.84 2758 2737 624.4
D 8 195 11378918 18352.01 2612 2531 619.9
D 1 52 7101770 11452.25 2612 2531 619.9
D 12 235 4381095 7063.35 2612 2531 619.9

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