ASTROSAT CZTI

Data Quality Report

Orbit 56202

Creation date: 2026-02-16T18:44:11.697176
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_083T04_9000006550_56202cztM0_level2.fits modeM0/AS1A14_083T04_9000006550_56202cztM0_level2_quad_clean.evt
Size (bytes)655,876,80092,710,080
Size625.5 MB 88.4 MB
Events in quadrant A7,323,894561,524
Events in quadrant B3,739,683691,743
Events in quadrant C4,727,050606,271
Events in quadrant D7,982,021492,420

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0264731
B0155235
C0186671
D0282151

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6533119118.230522%
B65332954.515537%
C65334046.183989%
D6533129519.822440%

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 7653 6533 981 981 12.82% 15.02%
B 7652 6532 101 101 1.32% 1.55%
C 7653 6533 291 291 3.80% 4.45%
D 7653 6533 1221 1221 15.95% 18.69%

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 32 1791113 10678.34 683 666 167.7
A 12 115 1082551 6452.43 683 666 167.7
A 8 176 856665 5105.23 683 666 167.7
B 5 185 471843 3142.35 708 686 149.9
B 4 156 261866 1741.92 708 686 149.9
B 10 247 41520 272.34 708 686 149.9
C 12 254 1427469 7600.72 688 680 187.7
C 12 252 346353 1841.45 688 680 187.7
C 6 223 76663 404.77 688 680 187.7
D 11 129 3936586 21128.44 657 627 186.3
D 4 230 405920 2175.64 657 627 186.3
D 2 249 251827 1348.46 657 627 186.3

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