ASTROSAT CZTI

Data Quality Report

Orbit 57236

Creation date: 2026-04-30T16:14:24.193500
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_070T08_9000006568_57236cztM0_level2.fits modeM0/AS1A14_070T08_9000006568_57236cztM0_level2_quad_clean.evt
Size (bytes)412,061,76087,094,080
Size393.0 MB 83.1 MB
Events in quadrant A3,976,472566,118
Events in quadrant B3,337,796600,309
Events in quadrant C3,991,088508,123
Events in quadrant D3,416,928486,563

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0150
C0150
D0150

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0168893
B0150232
C0169572
D0152022

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A68221852.711815%
B68221762.579889%
C68221872.741132%
D6822891.304603%

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 7946 7108 102 102 1.28% 1.44%
B 7946 7107 77 77 0.97% 1.08%
C 7946 7102 130 130 1.64% 1.83%
D 7946 7108 65 65 0.82% 0.91%

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 1149152 6539.91 707 689 175.6
A 10 251 41331 231.43 707 689 175.6
A 9 129 17161 93.8 707 689 175.6
B 10 16 343035 2319.55 695 670 147.6
B 10 247 71685 481.13 695 670 147.6
B 5 185 68001 456.17 695 670 147.6
C 15 224 1221704 6497.61 680 671 187.9
C 14 254 69954 368.68 680 671 187.9
C 9 237 34221 178.53 680 671 187.9
D 8 240 303818 1556.97 681 649 194.7
D 8 160 108593 554.36 681 649 194.7
D 9 1 87972 448.46 681 649 194.7

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