ASTROSAT CZTI

Data Quality Report

Orbit 20171004_A04_109T01_9000001578_level2

Creation date: 2025-11-17T12:08:38.081789
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_109T01_9000001578cztM0_level2.fits modeM0/AS1A04_109T01_9000001578cztM0_level2_quad_clean.evt
Size (bytes)469,033,920523,272,960
Size447.3 MB 499.0 MB
Events in quadrant A2,737,5523,070,908
Events in quadrant B2,695,3383,189,605
Events in quadrant C2,811,7843,186,434
Events in quadrant D2,430,8562,873,810

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010460
B010460
C010480
D010480

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0580
B0580
C0580
D0580

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01432600
B01288710
C01047920
D01177250

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5139433316.481301%
B5140122464.369565%
C513922610.507861%
D513968411.636314%

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 57336 51322 0 0 0.00% 0.00%
B 57336 51413 0 0 0.00% 0.00%
C 57336 51413 0 0 0.00% 0.00%
D 57336 51399 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 2626 10.84 714 669 180.6
A 7 110 2215 8.56 714 669 180.6
A 0 30 2075 7.78 714 669 180.6
B 2 9 2356 11.99 711 677 140.0
B 14 254 1843 8.33 711 677 140.0
B 3 17 1800 8.02 711 677 140.0
C 1 81 2136 7.47 743 688 193.7
C 1 80 2117 7.37 743 688 193.7
C 3 158 1931 6.41 743 688 193.7
D 3 14 1825 6.48 693 628 184.6
D 6 231 1759 6.13 693 628 184.6
D 7 3 1709 5.86 693 628 184.6

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