ASTROSAT CZTI

Data Quality Report

Orbit 57875

Creation date: 2026-06-09T07:22:39.950238
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_125T11_9000006582_57875cztM0_level2.fits modeM0/AS1A14_125T11_9000006582_57875cztM0_level2_quad_clean.evt
Size (bytes)385,292,16087,462,720
Size367.4 MB 83.4 MB
Events in quadrant A2,885,524560,520
Events in quadrant B3,058,469610,765
Events in quadrant C4,418,192522,726
Events in quadrant D3,377,998486,756

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0137692
B0140662
C0178972
D0145382

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0160
C0160
D0160

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6706250.372800%
B6706570.849985%
C67062253.355204%
D6706480.715777%

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 7973 6989 5 5 0.06% 0.07%
B 7973 6989 9 9 0.11% 0.13%
C 7973 6989 195 195 2.45% 2.79%
D 7973 6989 32 32 0.40% 0.46%

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 7 64 62640 354.81 710 692 174.6
A 3 14 44745 252.32 710 692 174.6
A 3 245 24632 137.12 710 692 174.6
B 5 172 66859 440.41 706 680 150.3
B 0 153 36286 236.95 706 680 150.3
B 10 247 30368 197.57 706 680 150.3
C 15 224 850102 4568.98 682 676 185.9
C 12 2 296278 1590.02 682 676 185.9
C 6 13 288083 1545.94 682 676 185.9
D 12 110 366105 1879.28 684 651 194.5
D 12 248 85979 438.78 684 651 194.5
D 3 12 81897 417.79 684 651 194.5

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