ASTROSAT CZTI

Data Quality Report

Orbit 20201031_A09_038T20_9000003940_level2

Creation date: 2025-12-16T20:30:43.529807
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/AS1A09_038T20_9000003940cztM0_level2.fits modeM0/AS1A09_038T20_9000003940cztM0_level2_quad_clean.evt
Size (bytes)55,598,40064,252,800
Size53.0 MB 61.3 MB
Events in quadrant A336,388404,200
Events in quadrant B323,710404,722
Events in quadrant C327,040382,879
Events in quadrant D281,460338,405

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0123100
B0125520
C0129030
D0159070

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01180
B01180
C01180
D01180

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A59421482.490744%
B59421823.062942%
C59422323.904409%
D59424617.758331%

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 5962 5942 0 0 0.00% 0.00%
B 5962 5941 0 0 0.00% 0.00%
C 5962 5942 0 0 0.00% 0.00%
D 5962 5932 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 7 110 284 8.44 87 83 23.8
A 0 29 266 7.68 87 83 23.8
A 9 19 259 7.39 87 83 23.8
B 2 9 281 10.49 85 81 19.0
B 2 8 237 8.18 85 81 19.0
B 14 254 236 8.12 85 81 19.0
C 12 249 248 7.19 86 81 23.2
C 12 250 247 7.15 86 81 23.2
C 3 126 238 6.76 86 81 23.2
D 3 159 209 5.8 80 73 23.5
D 15 46 203 5.54 80 73 23.5
D 4 160 200 5.41 80 73 23.5

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