ASTROSAT CZTI

Data Quality Report

Orbit 20180615_A04_101T01_9000002170_level2

Creation date: 2025-11-22T23:43:30.497989
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/AS1A04_101T01_9000002170cztM0_level2.fits modeM0/AS1A04_101T01_9000002170cztM0_level2_quad_clean.evt
Size (bytes)954,057,600911,018,880
Size909.9 MB 868.8 MB
Events in quadrant A5,849,9765,482,478
Events in quadrant B5,528,8945,263,993
Events in quadrant C5,696,8185,193,662
Events in quadrant D5,045,8664,878,581

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01430
B01430
C01430
D01430

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020140
B020140
C020140
D020140

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02253930
B02183190
C02317220
D02212750

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9879910941.107299%
B9879922192.245974%
C987998010.810737%
D9879915571.575927%

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 113149 98784 0 0 0.00% 0.00%
B 113149 98750 0 0 0.00% 0.00%
C 113149 98784 0 0 0.00% 0.00%
D 113149 98753 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 0 29 5719 11.26 1520 1418 381.9
A 7 110 4581 8.28 1520 1418 381.9
A 9 19 4435 7.9 1520 1418 381.9
B 2 9 4834 11.84 1461 1390 290.9
B 3 17 3793 8.26 1461 1390 290.9
B 5 128 3711 7.98 1461 1390 290.9
C 12 241 3885 6.36 1507 1403 390.3
C 2 191 3806 6.16 1507 1403 390.3
C 7 111 3765 6.05 1507 1403 390.3
D 6 231 3765 6.33 1438 1305 388.9
D 3 14 3702 6.16 1438 1305 388.9
D 6 67 3477 5.59 1438 1305 388.9

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