ASTROSAT CZTI

Data Quality Report

Orbit 56240

Creation date: 2026-02-19T12:20:02.880656
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_56240cztM0_level2.fits modeM0/AS1A14_083T04_9000006550_56240cztM0_level2_quad_clean.evt
Size (bytes)937,696,32080,760,960
Size894.3 MB 77.0 MB
Events in quadrant A14,986,277305,694
Events in quadrant B4,562,207656,025
Events in quadrant C4,045,906562,910
Events in quadrant D10,520,357384,587

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01580
B01580
C01580
D01580

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0140
B0140
C0140
D0140

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0498912
B0191472
C0178912
D0366282

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7698429955.845674%
B76993104.026497%
C76992393.104299%
D7699229929.861021%

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 9395 7939 3987 3987 42.44% 50.22%
B 9396 7983 160 160 1.70% 2.00%
C 9396 7983 140 140 1.49% 1.75%
D 9396 7937 2148 2148 22.86% 27.06%

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 8 176 3289952 21525.4 608 593 152.8
A 7 64 3108731 20339.5 608 593 152.8
A 15 32 2469994 16159.64 608 593 152.8
B 4 171 288597 1674.15 800 771 171.9
B 8 128 234123 1357.3 800 771 171.9
B 4 206 219658 1273.17 800 771 171.9
C 5 250 334509 1561.92 778 770 213.7
C 15 230 334032 1559.69 778 770 213.7
C 6 223 158500 738.19 778 770 213.7
D 8 129 6324554 32859.53 676 643 192.5
D 2 249 562066 2917.2 676 643 192.5
D 15 115 218223 1130.56 676 643 192.5

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