ASTROSAT CZTI

Data Quality Report

Orbit 57150

Creation date: 2026-04-21T13:45:18.190778
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_083T10_9000006566_57150cztM0_level2.fits modeM0/AS1A14_083T10_9000006566_57150cztM0_level2_quad_clean.evt
Size (bytes)869,785,92092,952,000
Size829.5 MB 88.6 MB
Events in quadrant A3,270,657725,888
Events in quadrant B3,664,807776,818
Events in quadrant C14,817,527277,756
Events in quadrant D9,855,218505,633

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0155700
B0164200
C0491900
D0344970

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01520
B01520
C01520
D01520

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7588771.014760%
B75891872.464093%
C7589489464.488075%
D7589205527.078666%

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 7588 7588 0 0 0.00% 0.00%
B 7589 7589 13 13 0.17% 0.17%
C 7589 7589 4114 4114 54.21% 54.21%
D 7589 7589 1866 1866 24.59% 24.59%

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 6 19708 92.02 837 815 205.3
A 13 254 12006 54.51 837 815 205.3
A 3 137 10362 46.5 837 815 205.3
B 10 16 116554 659.95 823 792 175.4
B 10 247 100945 570.97 823 792 175.4
B 4 201 28938 160.46 823 792 175.4
C 15 198 11836432 78691.78 555 549 150.4
C 9 38 559998 3719.54 555 549 150.4
C 13 3 83736 553.08 555 549 150.4
D 12 33 5800690 28286.78 727 694 205.0
D 2 249 390975 1903.41 727 694 205.0
D 8 240 197066 957.71 727 694 205.0

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