ASTROSAT CZTI

Data Quality Report

Orbit 51794

Creation date: 2025-04-26T04:25:33.521690
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_090T01_9000006464_51794cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51794cztM0_level2_quad_clean.evt
Size (bytes)2,256,759,360242,726,400
Size2.1 GB 231.5 MB
Events in quadrant A19,547,8191,565,865
Events in quadrant B23,525,7761,467,084
Events in quadrant C14,424,8141,667,135
Events in quadrant D24,529,2051,295,792

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03960
B03960
C03960
D03960

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0716694
B0834664
C0561434
D0865755

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A19623274113.968303%
B19623515826.285481%
C1962310505.350864%
D19622457523.315666%

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 20717 19623 1997 1997 9.64% 10.18%
B 20718 19623 4030 4030 19.45% 20.54%
C 20718 19626 733 733 3.54% 3.73%
D 20717 19626 4291 4291 20.71% 21.86%

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 15 174 6170681 12391.32 2029 1976 497.8
A 12 3 1369688 2747.38 2029 1976 497.8
A 4 175 604766 1210.85 2029 1976 497.8
B 10 128 9904273 24247.23 1894 1824 408.4
B 4 81 3183722 7791.23 1894 1824 408.4
B 7 252 679484 1659.32 1894 1824 408.4
C 15 218 1485976 2655.91 2052 2039 558.7
C 10 22 783654 1398.91 2052 2039 558.7
C 13 3 631864 1127.24 2052 2039 558.7
D 11 129 11810404 22480.35 1874 1808 525.3
D 3 12 1213535 2306.8 1874 1808 525.3
D 7 60 896746 1703.72 1874 1808 525.3

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