ASTROSAT CZTI

Data Quality Report

Orbit 20180606_G08_081T01_9000002144_level2

Creation date: 2025-11-22T18:46:42.891854
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_081T01_9000002144cztM0_level2.fits modeM0/AS1G08_081T01_9000002144cztM0_level2_quad_clean.evt
Size (bytes)760,469,760713,672,640
Size725.2 MB 680.6 MB
Events in quadrant A4,613,5704,299,318
Events in quadrant B4,440,1264,147,487
Events in quadrant C4,563,1983,964,702
Events in quadrant D4,000,6163,789,177

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A016120
B016120
C016120
D016120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01740390
B01712460
C01735100
D01867460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7895110631.346405%
B7895112781.618726%
C789517780.985421%
D7895116112.040506%

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 91631 78951 0 0 0.00% 0.00%
B 91631 78949 0 0 0.00% 0.00%
C 91631 78950 0 0 0.00% 0.00%
D 91631 78938 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 4397 10.99 1199 1122 298.0
A 7 110 3806 9.01 1199 1122 298.0
A 9 19 3528 8.07 1199 1122 298.0
B 2 9 3787 11.68 1171 1116 228.6
B 3 17 2897 7.79 1171 1116 228.6
B 3 80 2896 7.79 1171 1116 228.6
C 1 80 3506 7.78 1204 1122 306.6
C 1 81 3404 7.44 1204 1122 306.6
C 12 241 3217 6.83 1204 1122 306.6
D 3 14 2898 6.09 1139 1035 305.7
D 6 231 2891 6.07 1139 1035 305.7
D 6 67 2858 5.96 1139 1035 305.7

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