ASTROSAT CZTI

Data Quality Report

Orbit 20220102_A11_068T01_9000004836_level2

Creation date: 2022-01-05T10:10:03.191666
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_068T01_9000004836cztM0_level2_bc.evt modeM0/AS1A11_068T01_9000004836cztM0_level2_quad_clean.evt
Size (bytes)1,501,721,280368,873,280
Size1.4 GB 351.8 MB
Events in quadrant A7,358,6462,406,183
Events in quadrant B9,951,2082,350,392
Events in quadrant C10,739,2762,393,169
Events in quadrant D15,601,2972,175,305

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01170
B01170
C01170
D01180

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0609680
B0720460
C0722670
D0955500

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05460
B05460
C05460
D05460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A268638313.093474%
B2686314525.405204%
C268636542.434575%
D26863298311.104493%

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 37888 26867 11 11 0.03% 0.04%
B 37888 26862 90 90 0.24% 0.34%
C 37888 26862 81 81 0.21% 0.30%
D 37888 26863 260 260 0.69% 0.97%

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 1552122 4799.75 1476 1459 323.1
A 13 6 65248 197.45 1476 1459 323.1
A 13 254 44231 132.39 1476 1459 323.1
B 5 172 3548133 12329.73 1458 1430 287.7
B 4 232 127644 438.77 1458 1430 287.7
B 0 199 91509 313.15 1458 1430 287.7
C 3 233 1563218 4815.17 1445 1438 324.3
C 0 10 1207432 3718.24 1445 1438 324.3
C 15 214 1088895 3352.77 1445 1438 324.3
D 12 235 4858107 14570.91 1405 1363 333.3
D 8 195 1894652 5680.13 1405 1363 333.3
D 2 249 639780 1915.34 1405 1363 333.3

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