ASTROSAT CZTI

Data Quality Report

Orbit 56916

Creation date: 2026-04-05T19:23:18.514108
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_083T14_9000006564_56916cztM0_level2.fits modeM0/AS1A14_083T14_9000006564_56916cztM0_level2_quad_clean.evt
Size (bytes)1,024,562,88068,146,560
Size977.1 MB 65.0 MB
Events in quadrant A9,214,457389,102
Events in quadrant B5,654,187570,805
Events in quadrant C11,032,167425,858
Events in quadrant D11,550,568246,628

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01240
B01240
C01240
D01240

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A090
B090
C090
D090

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0315481
B0211041
C0370211
D0385941

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6171238538.648517%
B617171111.521633%
C6172182329.536617%
D6172364859.105638%

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 7001 6172 2101 2101 30.01% 34.04%
B 7001 6172 488 488 6.97% 7.91%
C 7002 6173 2159 2159 30.83% 34.97%
D 7002 6173 2791 2791 39.86% 45.21%

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 7 64 6785621 51041.17 535 521 132.9
A 12 15 283530 2128.95 535 521 132.9
A 10 251 39394 292.42 535 521 132.9
B 5 185 1387672 10807.67 600 577 128.3
B 5 172 1326810 10333.46 600 577 128.3
B 10 16 290210 2256.7 600 577 128.3
C 9 38 7512893 47597.3 571 564 157.8
C 13 3 1030450 6525.25 571 564 157.8
C 14 254 103689 653.39 571 564 157.8
D 12 33 8289877 63053.88 462 440 131.5
D 2 249 920387 6997.61 462 440 131.5
D 8 240 127492 966.43 462 440 131.5

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