ASTROSAT CZTI

Data Quality Report

Orbit 52851

Creation date: 2025-07-16T10:25:42.561056
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/AS1C09_011T08_9000006482_52851cztM0_level2.fits modeM0/AS1C09_011T08_9000006482_52851cztM0_level2_quad_clean.evt
Size (bytes)1,247,636,16084,951,360
Size1.2 GB 81.0 MB
Events in quadrant A8,146,310672,362
Events in quadrant B10,950,230564,153
Events in quadrant C7,896,356585,640
Events in quadrant D18,564,678185,364

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0298760
B0381430
C0295330
D0606207

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01620
B01620
C01620
D01620

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8114133216.416071%
B8115267732.988293%
C8115164420.258780%
D8114632477.939364%

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 8114 8114 1017 1017 12.53% 12.53%
B 8115 8115 1911 1911 23.55% 23.55%
C 8115 8115 1140 1140 14.05% 14.05%
D 8113 8113 5493 5493 67.71% 67.71%

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 3 62 1734292 8772.16 792 774 197.6
A 9 191 753699 3810.04 792 774 197.6
A 0 12 654330 3307.21 792 774 197.6
B 8 3 6879383 44327.02 731 707 155.2
B 10 254 282817 1817.95 731 707 155.2
B 1 223 173664 1114.55 731 707 155.2
C 15 224 3484677 16763.91 748 742 207.8
C 2 12 689454 3313.93 748 742 207.8
C 7 80 237384 1138.67 748 742 207.8
D 12 2 14921406 120373.07 418 398 124.0
D 8 176 759062 6120.41 418 398 124.0
D 11 176 338078 2724.18 418 398 124.0

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