ASTROSAT CZTI

Data Quality Report

Orbit 51558

Creation date: 2025-04-10T04:36:44.770757
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/AS1A13_037T05_9000006460_51558cztM0_level2.fits modeM0/AS1A13_037T05_9000006460_51558cztM0_level2_quad_clean.evt
Size (bytes)861,894,720109,944,000
Size822.0 MB 104.9 MB
Events in quadrant A9,826,657629,049
Events in quadrant B7,551,518768,723
Events in quadrant C7,326,444706,179
Events in quadrant D6,568,058656,121

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0348840
B0281390
C0276250
D0253930

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01640
B01640
C01640
D01640

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8180177521.699267%
B818099012.102689%
C81797298.913070%
D81805917.224939%

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 8180 8180 1423 1423 17.40% 17.40%
B 8180 8180 709 709 8.67% 8.67%
C 8179 8179 642 642 7.85% 7.85%
D 8180 8180 537 537 6.56% 6.56%

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 12 250 2544238 12456.22 820 797 204.2
A 7 64 1581245 7740.07 820 797 204.2
A 12 3 915674 4480.51 820 797 204.2
B 10 44 1837956 9995.07 856 826 183.8
B 10 41 1182398 6428.45 856 826 183.8
B 12 18 362187 1966.02 856 826 183.8
C 0 177 2857594 12316.87 845 837 231.9
C 15 157 489439 2106.6 845 837 231.9
C 13 3 161444 692.45 845 837 231.9
D 8 176 1060152 4599.32 826 798 230.3
D 12 6 916039 3973.64 826 798 230.3
D 6 42 414729 1797.13 826 798 230.3

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