ASTROSAT CZTI

Data Quality Report

Orbit 20180801_G08_035T01_9000002268_level2

Creation date: 2025-11-23T20:09:58.879497
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/AS1G08_035T01_9000002268cztM0_level2.fits modeM0/AS1G08_035T01_9000002268cztM0_level2_quad_clean.evt
Size (bytes)197,703,360169,292,160
Size188.5 MB 161.4 MB
Events in quadrant A1,150,724917,723
Events in quadrant B1,140,022941,345
Events in quadrant C1,185,770941,202
Events in quadrant D1,001,734817,662

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04460
B04460
C04460
D04460

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0190
B0190
C0190
D0190

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0574660
B0574760
C0447030
D0548370

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A2190618228.317356%
B2190610494.788642%
C219061110.506710%
D219069324.254542%

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 23881 21783 0 0 0.00% 0.00%
B 23881 21903 0 0 0.00% 0.00%
C 23881 21906 0 0 0.00% 0.00%
D 23881 21886 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 1143 11.27 299 280 76.6
A 7 110 941 8.63 299 280 76.6
A 0 30 898 8.07 299 280 76.6
B 2 9 950 10.82 300 286 61.4
B 2 8 772 7.92 300 286 61.4
B 14 254 772 7.92 300 286 61.4
C 12 241 873 7.06 313 290 82.6
C 7 111 844 6.71 313 290 82.6
C 3 126 821 6.43 313 290 82.6
D 6 231 765 6.54 286 260 77.3
D 1 19 725 6.02 286 260 77.3
D 6 38 706 5.77 286 260 77.3

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