ASTROSAT CZTI

Data Quality Report

Orbit 20171118_G08_031T01_9000001702_level2

Creation date: 2025-11-18T10:58:32.531998
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/AS1G08_031T01_9000001702cztM0_level2.fits modeM0/AS1G08_031T01_9000001702cztM0_level2_quad_clean.evt
Size (bytes)424,062,720384,143,040
Size404.4 MB 366.3 MB
Events in quadrant A2,523,7122,206,461
Events in quadrant B2,456,3322,190,363
Events in quadrant C2,552,2702,158,417
Events in quadrant D2,142,1841,911,425

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01194460
B01148220
C0940700
D01215350

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0530
B0530
C0530
D0530

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09440
B09440
C09440
D09440

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A4611816173.506223%
B4611819584.245631%
C461181760.381630%
D4611827515.965133%

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 51538 46117 0 0 0.00% 0.00%
B 51538 46110 0 0 0.00% 0.00%
C 51538 46118 0 0 0.00% 0.00%
D 51538 46016 0 0 0.00% 0.00%

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 14 188 2537 11.69 656 613 164.5
A 0 29 2390 10.8 656 613 164.5
A 14 204 2124 9.18 656 613 164.5
B 2 9 2207 12.02 648 615 132.4
B 14 254 1705 8.23 648 615 132.4
B 3 17 1702 8.21 648 615 132.4
C 1 80 1895 7.18 672 623 177.2
C 1 81 1850 6.93 672 623 177.2
C 12 241 1840 6.87 672 623 177.2
D 3 14 1604 6.4 609 552 164.3
D 3 31 1602 6.39 609 552 164.3
D 6 231 1558 6.12 609 552 164.3

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