ASTROSAT CZTI

Data Quality Report

Orbit 20210814_T04_041T01_9000004642_level2

Creation date: 2021-08-16T15:23:39.068183
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_041T01_9000004642cztM0_level2_bc.evt modeM0/AS1T04_041T01_9000004642cztM0_level2_quad_clean.evt
Size (bytes)5,748,816,9601,348,355,520
Size5.4 GB 1.3 GB
Events in quadrant A55,640,9317,881,792
Events in quadrant B50,060,8289,114,086
Events in quadrant C26,960,3148,697,208
Events in quadrant D34,954,7698,598,626

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01550
B01550
C01550
D01550

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03707570
B03010910
C02313180
D02425740

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A019480
B019480
C019480
D019480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A954442574626.974980%
B9544432803.436570%
C9544461936.488622%
D9544417351.817820%

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 110934 95428 1007 1007 0.91% 1.06%
B 110934 95446 102 102 0.09% 0.11%
C 110934 95447 29 29 0.03% 0.03%
D 110934 95445 101 101 0.09% 0.11%

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 37283101 36734.24 4721 4664 1014.8
A 13 254 141493 134.83 4721 4664 1014.8
A 13 6 86400 80.54 4721 4664 1014.8
B 6 159 24585112 23638.53 5471 5361 1039.8
B 10 245 3193877 3066.42 5471 5361 1039.8
B 5 255 636365 606.84 5471 5361 1039.8
C 0 10 3988983 3240.49 5173 5185 1229.4
C 3 233 2132391 1730.31 5173 5185 1229.4
C 14 254 395817 317.75 5173 5185 1229.4
D 8 195 9466968 7746.55 5386 5249 1221.4
D 12 227 1673536 1365.87 5386 5249 1221.4
D 12 233 1084026 883.22 5386 5249 1221.4

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