ASTROSAT CZTI

Data Quality Report

Orbit 20171026_T01_202T01_9000001640_level2

Creation date: 2025-11-18T00:20:04.691055
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/AS1T01_202T01_9000001640cztM0_level2.fits modeM0/AS1T01_202T01_9000001640cztM0_level2_quad_clean.evt
Size (bytes)603,587,520800,841,600
Size575.6 MB 763.7 MB
Events in quadrant A3,598,8425,216,425
Events in quadrant B3,525,4625,212,295
Events in quadrant C3,549,8764,791,266
Events in quadrant D3,087,8424,524,364

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0960
B0960
C0960
D0960

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01695300
B01633690
C01668920
D01790750

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013420
B013420
C013440
D013440

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6577728694.361707%
B6577528384.314709%
C6577752127.923742%
D6577431344.764801%

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 75688 65732 0 0 0.00% 0.00%
B 75688 65775 0 0 0.00% 0.00%
C 75688 65699 0 0 0.00% 0.00%
D 75688 65679 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 14 188 3648 11.57 935 876 239.6
A 0 29 3529 11.07 935 876 239.6
A 14 204 3103 9.3 935 876 239.6
B 2 9 3167 12.52 929 888 182.0
B 12 226 2556 9.16 929 888 182.0
B 2 8 2405 8.33 929 888 182.0
C 3 202 3208 9.58 935 875 243.5
C 1 80 2968 8.6 935 875 243.5
C 1 81 2928 8.43 935 875 243.5
D 4 246 2435 6.92 878 801 235.9
D 3 14 2296 6.34 878 801 235.9
D 6 231 2258 6.17 878 801 235.9

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