ASTROSAT CZTI

Data Quality Report

Orbit 51673

Creation date: 2025-04-22T12:01:04.736576
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/AS1A13_031T01_9000006462_51673cztM0_level2.fits modeM0/AS1A13_031T01_9000006462_51673cztM0_level2_quad_clean.evt
Size (bytes)645,240,960108,587,520
Size615.3 MB 103.6 MB
Events in quadrant A7,224,742658,958
Events in quadrant B5,267,647784,355
Events in quadrant C6,596,858628,857
Events in quadrant D4,180,626664,920

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040
B050
C050
D050

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0269741
B0210281
C0253171
D0183791

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01600
B01600
C01600
D01600

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7924117214.790510%
B79244255.363453%
C7924110213.907118%
D79241752.208481%

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 7923 7923 878 878 11.08% 11.08%
B 7924 7924 153 153 1.93% 1.93%
C 7924 7924 962 962 12.14% 12.14%
D 7924 7924 112 112 1.41% 1.41%

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 2676764 13531.48 819 798 197.8
A 12 250 276352 1393.38 819 798 197.8
A 12 3 268024 1351.27 819 798 197.8
B 10 44 484511 2638.13 856 823 183.3
B 12 32 290510 1580.01 856 823 183.3
B 10 128 238303 1295.26 856 823 183.3
C 15 189 1398977 6618.44 785 780 211.3
C 5 250 1205815 5704.1 785 780 211.3
C 12 249 166727 785.52 785 780 211.3
D 2 249 197048 854.2 840 809 229.7
D 3 12 135941 588.21 840 809 229.7
D 6 42 130591 564.92 840 809 229.7

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