ASTROSAT CZTI

Data Quality Report

Orbit 20220227_A11_069T01_9000004972_level2

Creation date: 2022-03-16T14:38:46.600501
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/AS1A11_069T01_9000004972cztM0_level2_bc.evt modeM0/AS1A11_069T01_9000004972cztM0_level2_quad_clean.evt
Size (bytes)924,163,200202,037,760
Size881.4 MB 192.7 MB
Events in quadrant A8,267,1361,251,373
Events in quadrant B4,828,1871,287,219
Events in quadrant C4,095,1811,268,510
Events in quadrant D9,684,3141,186,656

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0520
B0520
C0520
D0530

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03340
B03340
C03340
D03340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0533700
B0384020
C0342480
D0530470

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A16304169910.420756%
B163045573.416340%
C163041230.754416%
D163044192.569921%

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 25772 16306 12 12 0.05% 0.07%
B 25772 16305 170 170 0.66% 1.04%
C 25772 16303 7 7 0.03% 0.04%
D 25772 16303 60 60 0.23% 0.37%

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 15 169 4665772 26758.98 776 763 174.3
A 7 48 266456 1524.04 776 763 174.3
A 10 83 120775 688.4 776 763 174.3
B 0 182 764557 4727.5 800 782 161.6
B 5 172 394508 2437.03 800 782 161.6
B 5 255 190708 1175.58 800 782 161.6
C 15 214 665176 3627.94 790 782 183.1
C 0 10 190897 1038.13 790 782 183.1
C 14 67 91837 497.21 790 782 183.1
D 8 195 4602730 23739.72 789 761 193.9
D 10 199 281839 1449.97 789 761 193.9
D 1 52 240661 1237.55 789 761 193.9

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