ASTROSAT CZTI

Data Quality Report

Orbit 20171208_T01_209T01_9000001758_level2

Creation date: 2025-11-19T00:35:18.118132
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_209T01_9000001758cztM0_level2.fits modeM0/AS1T01_209T01_9000001758cztM0_level2_quad_clean.evt
Size (bytes)621,659,520735,379,200
Size592.9 MB 701.3 MB
Events in quadrant A3,708,8944,574,100
Events in quadrant B3,557,7604,547,581
Events in quadrant C3,719,4544,450,985
Events in quadrant D3,183,1004,044,022

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01580110
B01695360
C01382680
D01584810

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013860
B013860
C013860
D013860

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01090
B01090
C01090
D01090

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6788318152.673718%
B6788331624.658015%
C678835660.833788%
D6788313171.940103%

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 78928 67884 0 0 0.00% 0.00%
B 78928 67842 0 0 0.00% 0.00%
C 78928 67884 0 0 0.00% 0.00%
D 78927 67808 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 3662 11.42 966 906 241.3
A 7 110 3041 8.85 966 906 241.3
A 9 19 2833 7.99 966 906 241.3
B 2 9 3108 11.91 943 901 185.3
B 14 254 2449 8.35 943 901 185.3
B 3 17 2398 8.08 943 901 185.3
C 1 81 2807 7.47 981 915 253.4
C 1 80 2800 7.44 981 915 253.4
C 12 241 2682 6.97 981 915 253.4
D 3 14 2413 6.54 907 823 243.0
D 6 231 2327 6.19 907 823 243.0
D 7 3 2295 6.05 907 823 243.0

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