ASTROSAT CZTI

Data Quality Report

Orbit 20180701_A04_099T01_9000002204_level2

Creation date: 2025-11-23T06:18:48.904240
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_099T01_9000002204cztM0_level2.fits modeM0/AS1A04_099T01_9000002204cztM0_level2_quad_clean.evt
Size (bytes)922,112,640858,271,680
Size879.4 MB 818.5 MB
Events in quadrant A5,770,4585,247,253
Events in quadrant B5,304,5185,064,926
Events in quadrant C5,575,3524,813,281
Events in quadrant D4,898,9564,493,324

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A018920
B018920
C018920
D018920

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01945150
B02431410
C02003960
D02086690

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01580
B01580
C01580
D01590

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9299714401.548437%
B9299775038.068002%
C9299714161.522630%
D9299720352.188243%

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 107912 92995 0 0 0.00% 0.00%
B 107910 92516 0 0 0.00% 0.00%
C 107910 92995 0 0 0.00% 0.00%
D 107910 92981 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 5428 10.88 1501 1409 369.4
A 7 110 4571 8.56 1501 1409 369.4
A 15 236 4288 7.79 1501 1409 369.4
B 2 9 4482 11.24 1398 1332 280.2
B 3 17 3557 7.94 1398 1332 280.2
B 5 232 3509 7.77 1398 1332 280.2
C 1 80 4134 7.24 1472 1369 381.7
C 1 81 4115 7.19 1472 1369 381.7
C 12 241 3978 6.84 1472 1369 381.7
D 6 231 3572 6.15 1397 1272 373.8
D 3 14 3533 6.05 1397 1272 373.8
D 6 67 3371 5.61 1397 1272 373.8

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