ASTROSAT CZTI

Data Quality Report

Orbit 55446

Creation date: 2025-12-27T21:13:18.801498
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/AS1A14_099T01_9000006536_55446cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55446cztM0_level2_quad_clean.evt
Size (bytes)433,229,76095,181,120
Size413.2 MB 90.8 MB
Events in quadrant A4,234,383621,706
Events in quadrant B2,957,466677,696
Events in quadrant C3,418,968595,478
Events in quadrant D4,931,272543,826

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01702513
B01345714
C01492411
D01906551

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A63593465.441107%
B63581422.233407%
C63592063.239503%
D63514947.778303%

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 7499 6364 244 244 3.25% 3.83%
B 7499 6364 12 12 0.16% 0.19%
C 7499 6365 127 127 1.69% 2.00%
D 7494 6355 395 395 5.27% 6.22%

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 3 78 1285414 7545.02 688 669 170.3
A 4 159 252732 1480.31 688 669 170.3
A 4 3 14402 80.65 688 669 170.3
B 12 32 54235 370.47 682 656 144.6
B 7 252 54006 368.89 682 656 144.6
B 5 172 44930 306.13 682 656 144.6
C 13 3 697621 3812.88 669 661 182.8
C 15 147 51422 277.7 669 661 182.8
C 9 38 23380 124.29 669 661 182.8
D 15 125 1098562 5949.55 656 630 184.5
D 11 129 269422 1456.55 656 630 184.5
D 2 249 257155 1390.07 656 630 184.5

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