ASTROSAT CZTI

Data Quality Report

Orbit 00776

Creation date: 2024-06-27T14:02:47.916557
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/AS1P01_010T01_9000000108_00776cztM0_level2.evt modeM0/AS1P01_010T01_9000000108_00776cztM0_level2_quad_clean.evt
Size (bytes)1,536,482,880141,626,880
Size1.4 GB 135.1 MB
Events in quadrant A11,301,636928,930
Events in quadrant B11,892,341919,571
Events in quadrant C11,457,563903,653
Events in quadrant D11,270,372896,203

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01900
B01900
C01900
D01900

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0401100
B0418520
C0406370
D0400990

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A92361111.201819%
B9236951.028584%
C92361902.057168%
D92372702.923027%

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 10871 9236 402 402 3.70% 4.35%
B 10871 9236 409 409 3.76% 4.43%
C 10871 9236 524 524 4.82% 5.67%
D 10872 9237 590 590 5.43% 6.39%

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 8 192 128442 180.67 2884 2901 694.9
A 15 171 71571 98.83 2884 2901 694.9
A 15 17 24082 30.48 2884 2901 694.9
B 0 220 231091 321.8 3008 3019 708.7
B 7 221 124474 171.37 3008 3019 708.7
B 5 191 23162 28.42 3008 3019 708.7
C 10 17 676304 892.84 2707 2797 754.3
C 15 241 71332 90.85 2707 2797 754.3
C 10 207 53212 66.83 2707 2797 754.3
D 13 25 894846 1089.88 2635 2733 818.5
D 1 4 144999 173.8 2635 2733 818.5
D 6 226 132323 158.32 2635 2733 818.5

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