ASTROSAT CZTI

Data Quality Report

Orbit 51755

Creation date: 2025-04-23T10:10:53.556753
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_51755cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51755cztM0_level2_quad_clean.evt
Size (bytes)591,773,76095,843,520
Size564.4 MB 91.4 MB
Events in quadrant A4,028,202650,334
Events in quadrant B5,663,291654,392
Events in quadrant C4,224,942624,625
Events in quadrant D7,470,358506,513

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0164332
B0214702
C0169992
D0267732

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66911081.614109%
B669175911.343596%
C66922613.900179%
D6692119517.857143%

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 7856 6692 44 44 0.56% 0.66%
B 7856 6691 479 479 6.10% 7.16%
C 7857 6693 173 173 2.20% 2.58%
D 7857 6693 1035 1035 13.17% 15.46%

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 444417 2460.48 728 711 180.3
A 15 174 112774 621.42 728 711 180.3
A 9 160 101939 561.34 728 711 180.3
B 4 206 1750717 11763.22 698 674 148.8
B 7 0 585430 3930.54 698 674 148.8
B 10 41 139459 932.87 698 674 148.8
C 15 230 426464 2162.29 715 710 196.9
C 1 243 166625 842.64 715 710 196.9
C 13 3 148916 752.7 715 710 196.9
D 11 129 4108061 22300.18 659 636 184.2
D 8 176 290993 1576.42 659 636 184.2
D 10 181 208289 1127.4 659 636 184.2

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