ASTROSAT CZTI

Data Quality Report

Orbit 58266

Creation date: 2026-07-05T15:15:54.463835
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_044T03_9000006588_58266cztM0_level2.fits modeM0/AS1A14_044T03_9000006588_58266cztM0_level2_quad_clean.evt
Size (bytes)631,981,44092,514,240
Size602.7 MB 88.2 MB
Events in quadrant A3,299,000646,051
Events in quadrant B5,837,393601,737
Events in quadrant C3,850,864607,127
Events in quadrant D9,893,774484,364

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220
B0220
C0220
D0220

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0145172
B0216482
C0163552
D0340122

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66181502.266546%
B6618113017.074645%
C66182834.276216%
D6619150022.662034%

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 8898 6620 5 5 0.06% 0.08%
B 8898 6618 679 679 7.63% 10.26%
C 8898 6620 153 153 1.72% 2.31%
D 8899 6621 1267 1267 14.24% 19.14%

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 8 249 221911 1191.4 753 735 185.6
A 14 234 35293 186.15 753 735 185.6
A 13 248 33534 176.68 753 735 185.6
B 2 249 1217775 8365.76 687 663 145.5
B 6 255 991016 6807.14 687 663 145.5
B 4 206 207948 1424.76 687 663 145.5
C 12 249 860715 4391.07 716 707 195.9
C 15 204 67305 340.04 716 707 195.9
C 12 252 25532 126.75 716 707 195.9
D 12 110 5365748 28948.87 660 630 185.3
D 8 160 1431395 7720.06 660 630 185.3
D 2 249 80224 429.47 660 630 185.3

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