ASTROSAT CZTI

Data Quality Report

Orbit 55240

Creation date: 2025-12-14T00:37:00.705814
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_009T01_9000006534_55240cztM0_level2.fits modeM0/AS1A14_009T01_9000006534_55240cztM0_level2_quad_clean.evt
Size (bytes)570,790,08092,960,640
Size544.3 MB 88.7 MB
Events in quadrant A4,824,017602,752
Events in quadrant B3,342,920683,309
Events in quadrant C7,539,252508,639
Events in quadrant D4,898,736549,759

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0194872
B0149912
C0271472
D0195773

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0120
D0120

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A67466399.472280%
B67461001.482360%
C6746142021.049511%
D67454636.864344%

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 7735 6746 453 453 5.86% 6.72%
B 7736 6747 56 56 0.72% 0.83%
C 7736 6747 1334 1334 17.24% 19.77%
D 7735 6746 406 406 5.25% 6.02%

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 12 3 1348296 7876.49 687 672 171.1
A 0 8 495911 2894.54 687 672 171.1
A 12 194 164389 956.88 687 672 171.1
B 5 185 180511 1193.27 700 673 150.7
B 2 249 153837 1016.28 700 673 150.7
B 0 182 100923 665.19 700 673 150.7
C 12 254 3058196 17482.37 629 622 174.9
C 9 38 731391 4178.34 629 622 174.9
C 1 16 428644 2447.31 629 622 174.9
D 8 160 1487327 7784.24 674 646 191.0
D 2 249 318553 1664.56 674 646 191.0
D 11 129 136216 709.84 674 646 191.0

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