ASTROSAT CZTI

Data Quality Report

Orbit 51827

Creation date: 2025-04-28T06:54:15.041542
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_51827cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51827cztM0_level2_quad_clean.evt
Size (bytes)827,366,40080,890,560
Size789.0 MB 77.1 MB
Events in quadrant A5,315,365621,123
Events in quadrant B12,851,697302,053
Events in quadrant C4,183,168600,052
Events in quadrant D7,767,419467,320

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01320
B01320
C01320
D01320

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0204883
B0426932
C0171412
D0276502

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A65771912.904060%
B6577411462.551315%
C65772073.147332%
D6577135020.526076%

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 7657 6578 144 144 1.88% 2.19%
B 7657 6577 3200 3200 41.79% 48.65%
C 7657 6578 177 177 2.31% 2.69%
D 7657 6578 1200 1200 15.67% 18.24%

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 1297855 7513.83 698 680 172.6
A 15 250 253757 1465.94 698 680 172.6
A 5 240 209527 1209.74 698 680 172.6
B 15 54 9473989 80454.93 546 525 117.7
B 5 185 337706 2863.56 546 525 117.7
B 0 171 203410 1723.03 546 525 117.7
C 7 220 725312 3796.37 694 689 190.9
C 14 80 158400 826.26 694 689 190.9
C 0 192 141134 735.8 694 689 190.9
D 11 129 3907640 22768.46 620 599 171.6
D 8 176 378548 2202.52 620 599 171.6
D 9 49 373171 2171.18 620 599 171.6

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