ASTROSAT CZTI

Data Quality Report

Orbit 59256

Creation date: 2026-09-10T05:08:19.963469
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/AS1T05_271T01_9000006604_59256cztM0_level2.fits modeM0/AS1T05_271T01_9000006604_59256cztM0_level2_quad_clean.evt
Size (bytes)475,188,48099,887,040
Size453.2 MB 95.3 MB
Events in quadrant A4,093,441655,617
Events in quadrant B3,473,186703,834
Events in quadrant C3,768,466639,315
Events in quadrant D5,735,590560,085

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0166152
B0152472
C0159202
D0218442

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220
B0220
C0220
D0220

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6684891.331538%
B66841852.767804%
C66831251.870417%
D66845207.779773%

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 8894 6688 21 21 0.24% 0.31%
B 8894 6688 96 96 1.08% 1.44%
C 8893 6687 107 107 1.20% 1.60%
D 8894 6688 415 415 4.67% 6.21%

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 15 233 763867 4293.32 729 712 177.8
A 3 14 202213 1133.59 729 712 177.8
A 0 24 132835 743.29 729 712 177.8
B 4 236 263678 1697.24 725 697 154.9
B 4 201 206042 1325.27 725 697 154.9
B 10 247 71868 459.33 725 697 154.9
C 12 252 716619 3584.31 727 721 199.7
C 15 208 183291 914.08 727 721 199.7
C 12 250 8387 38.38 727 721 199.7
D 12 110 2034534 10315.19 695 664 197.2
D 8 160 444188 2249.42 695 664 197.2
D 7 238 288649 1460.57 695 664 197.2

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

TCT plots

Parameter TCT0 TCT_healed
Tct