ASTROSAT CZTI

Data Quality Report

Orbit 53937

Creation date: 2025-09-17T08:15:16.113976
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_057T04_9000006508_53937cztM0_level2.fits modeM0/AS1A14_057T04_9000006508_53937cztM0_level2_quad_clean.evt
Size (bytes)654,730,56091,048,320
Size624.4 MB 86.8 MB
Events in quadrant A4,348,334649,733
Events in quadrant B3,836,954693,014
Events in quadrant C3,633,643626,599
Events in quadrant D11,885,203310,368

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0177172
B0163402
C0157412
D0400602

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0190
C0200
D0200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A68492022.949336%
B68492934.277997%
C68492022.949336%
D6849343050.080304%

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 7844 6852 79 79 1.01% 1.15%
B 7844 6851 123 123 1.57% 1.80%
C 7844 6852 157 157 2.00% 2.29%
D 7844 6852 3360 3360 42.84% 49.04%

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 14 235 828703 4522.27 751 733 183.1
A 15 174 309587 1686.92 751 733 183.1
A 0 8 97472 528.38 751 733 183.1
B 0 213 697090 4354.64 744 718 159.9
B 5 236 46121 283.92 744 718 159.9
B 5 185 38714 237.6 744 718 159.9
C 1 241 441720 2208.97 729 722 199.6
C 9 38 99310 493.83 729 722 199.6
C 12 252 71094 352.5 729 722 199.6
D 8 176 6360173 41786.46 530 506 152.2
D 10 172 1661976 10916.76 530 506 152.2
D 2 165 1123290 7377.3 530 506 152.2

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