ASTROSAT CZTI

Data Quality Report

Orbit 20210808_T04_034T01_9000004632_level2

Creation date: 2021-08-13T21:30:58.202787
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_034T01_9000004632cztM0_level2_bc.evt modeM0/AS1T04_034T01_9000004632cztM0_level2_quad_clean.evt
Size (bytes)17,227,062,7203,909,130,560
Size16.0 GB 3.6 GB
Events in quadrant A127,781,88724,286,225
Events in quadrant B170,646,94225,131,511
Events in quadrant C93,191,61524,623,781
Events in quadrant D110,219,38224,270,001

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04580
B04590
C04590
D04590

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A059720
B059720
C059720
D059720

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08823150
B010049570
C07419770
D07641060

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A2932912991610.200108%
B293291201096.856330%
C293290137804.698421%
D29329069192.359099%

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 343302 293287 1885 1885 0.55% 0.64%
B 343302 293296 269 269 0.08% 0.09%
C 343303 293303 632 632 0.18% 0.22%
D 343302 293297 247 247 0.07% 0.08%

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 64930959 19192.11 15964 15735 3382.4
A 12 96 833185 241.68 15964 15735 3382.4
A 13 254 500763 143.4 15964 15735 3382.4
B 6 159 76614151 25060.71 16406 16030 3056.5
B 4 80 20640294 6747.67 16406 16030 3056.5
B 5 255 3469688 1129.94 16406 16030 3056.5
C 0 10 19598223 5249.91 15947 15939 3730.0
C 3 233 5326556 1423.75 15947 15939 3730.0
C 10 22 4250802 1135.34 15947 15939 3730.0
D 8 195 32519918 8838.76 16443 15970 3677.4
D 12 233 5969996 1619.07 16443 15970 3677.4
D 12 227 4019033 1088.55 16443 15970 3677.4

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