ASTROSAT CZTI

Data Quality Report

Orbit 20220211_A10_071T13_9000004922_level2

Creation date: 2026-01-01T00:33:30.334159
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/AS1A10_071T13_9000004922cztM0_level2.fits modeM0/AS1A10_071T13_9000004922cztM0_level2_quad_clean.evt
Size (bytes)373,913,280344,211,840
Size356.6 MB 328.3 MB
Events in quadrant A2,346,2322,071,384
Events in quadrant B2,195,2122,066,060
Events in quadrant C2,263,0501,985,775
Events in quadrant D1,844,5281,627,324

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07940
B07940
C07940
D07940

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0845380
B0939840
C0861700
D01517020

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A389282010.516338%
B3892813343.426839%
C389282490.639642%
D38928468812.042746%

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 63245 38928 0 0 0.00% 0.00%
B 63245 38920 0 0 0.00% 0.00%
C 63245 38927 0 0 0.00% 0.00%
D 63245 38915 0 0 0.00% 0.00%

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 29 1916 8.86 612 576 151.2
A 7 110 1887 8.67 612 576 151.2
A 9 19 1880 8.63 612 576 151.2
B 2 9 1924 11.8 582 556 115.9
B 5 128 1564 8.7 582 556 115.9
B 2 8 1553 8.6 582 556 115.9
C 3 187 1567 6.65 599 563 150.9
C 3 158 1537 6.45 599 563 150.9
C 9 233 1463 5.96 599 563 150.9
D 4 160 1378 6.38 528 482 140.4
D 6 38 1367 6.3 528 482 140.4
D 10 189 1353 6.2 528 482 140.4

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