ASTROSAT CZTI

Data Quality Report

Orbit 20220315_A11_069T01_9000005008_level2

Creation date: 2022-03-23T11:02:14.163188
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/AS1A11_069T01_9000005008cztM0_level2_bc.evt modeM0/AS1A11_069T01_9000005008cztM0_level2_quad_clean.evt
Size (bytes)1,497,856,320272,779,200
Size1.4 GB 260.1 MB
Events in quadrant A14,017,8591,255,765
Events in quadrant B7,502,2131,887,906
Events in quadrant C6,376,8331,875,519
Events in quadrant D15,886,6921,650,176

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320440
B0580480
C0499810
D0843050

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04740
B04740
C04740
D04740

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01140
B01140
C01140
D01140

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A230731245553.980843%
B230739814.251723%
C230732921.265548%
D23073243810.566463%

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 34489 23074 42 42 0.12% 0.18%
B 34490 23074 51 51 0.15% 0.22%
C 34490 23074 23 23 0.07% 0.10%
D 34490 23073 771 771 2.24% 3.34%

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 10896326 63319.78 762 751 172.1
A 10 83 137231 793.16 762 751 172.1
A 13 6 25313 142.74 762 751 172.1
B 5 172 2226982 9259.73 1228 1203 240.4
B 0 190 214098 885.69 1228 1203 240.4
B 0 244 114584 471.69 1228 1203 240.4
C 15 214 913939 3305.0 1211 1203 276.2
C 0 10 579589 2094.33 1211 1203 276.2
C 8 111 53397 188.99 1211 1203 276.2
D 1 52 3563168 12737.27 1168 1131 279.7
D 8 195 2478365 8858.19 1168 1131 279.7
D 2 31 1413865 5051.71 1168 1131 279.7

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