ASTROSAT CZTI

Data Quality Report

Orbit 50856

Creation date: 2025-02-21T22:09:54.270638
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/AS1C07_001T01_9000006450_50856cztM0_level2.fits modeM0/AS1C07_001T01_9000006450_50856cztM0_level2_quad_clean.evt
Size (bytes)597,193,92089,017,920
Size569.5 MB 84.9 MB
Events in quadrant A6,855,363557,371
Events in quadrant B3,424,699664,498
Events in quadrant C5,124,263538,639
Events in quadrant D6,218,776499,317

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0245331
B0144341
C0194191
D0227591

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A623387213.990053%
B62341953.128008%
C623367810.877587%
D623382813.284133%

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 7393 6233 677 677 9.16% 10.86%
B 7394 6234 65 65 0.88% 1.04%
C 7393 6234 513 513 6.94% 8.23%
D 7393 6234 649 649 8.78% 10.41%

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 80 2674817 16382.77 656 638 163.2
A 7 221 338425 2069.38 656 638 163.2
A 4 4 320878 1961.88 656 638 163.2
B 5 172 124888 864.34 672 648 143.7
B 4 81 113825 787.38 672 648 143.7
B 8 128 112549 778.5 672 648 143.7
C 12 2 766263 4399.58 635 630 174.0
C 1 29 546079 3134.33 635 630 174.0
C 4 5 188845 1081.55 635 630 174.0
D 2 216 1212242 6873.9 632 609 176.3
D 8 48 513325 2908.77 632 609 176.3
D 1 47 274460 1553.62 632 609 176.3

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