ASTROSAT CZTI

Data Quality Report

Orbit 53880

Creation date: 2025-09-13T12:23:10.683322
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/AS1A14_057T04_9000006508_53880cztM0_level2.fits modeM0/AS1A14_057T04_9000006508_53880cztM0_level2_quad_clean.evt
Size (bytes)902,361,60081,247,680
Size860.6 MB 77.5 MB
Events in quadrant A5,209,222581,024
Events in quadrant B3,645,563684,778
Events in quadrant C9,360,320467,488
Events in quadrant D14,640,543234,698

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0205231
B0158771
C0327061
D0483091

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01440
B01440
C01440
D01440

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040
B040
C040
D040

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A705796413.660196%
B70573895.512257%
C7057221231.344764%
D7057468266.345473%

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 7432 7058 635 635 8.54% 9.00%
B 7432 7058 42 42 0.57% 0.60%
C 7432 7057 1500 1500 20.18% 21.26%
D 7432 7058 3904 3904 52.53% 55.31%

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 15 174 1893963 10408.24 738 718 181.9
A 3 62 302740 1660.39 738 718 181.9
A 4 249 61026 331.55 738 718 181.9
B 5 185 191023 1143.43 771 744 166.4
B 0 213 152492 911.89 771 744 166.4
B 6 255 69231 411.56 771 744 166.4
C 15 158 3909878 21778.64 655 648 179.5
C 15 224 1828594 10183.63 655 648 179.5
C 15 209 669610 3726.84 655 648 179.5
D 8 176 10934085 74760.84 507 482 146.2
D 6 239 765838 5233.28 507 482 146.2
D 2 172 653305 4463.82 507 482 146.2

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