ASTROSAT CZTI

Data Quality Report

Orbit 20170527_T01_172T01_9000001250_level2

Creation date: 2025-11-13T20:41:01.951975
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_172T01_9000001250cztM0_level2.fits modeM0/AS1T01_172T01_9000001250cztM0_level2_quad_clean.evt
Size (bytes)76,348,80073,189,440
Size72.8 MB 69.8 MB
Events in quadrant A445,452417,676
Events in quadrant B437,618417,970
Events in quadrant C447,194408,635
Events in quadrant D388,932378,170

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01740
B01740
C01740
D01740

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B050
C050
D050

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0239900
B0179170
C0172880
D0183520

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A85451922.246928%
B8545590.690462%
C8545310.362785%
D8544650.760768%

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 8876 8546 0 0 0.00% 0.00%
B 8876 8546 0 0 0.00% 0.00%
C 8876 8546 0 0 0.00% 0.00%
D 8876 8546 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 29 430 10.16 115 108 31.7
A 7 110 379 8.55 115 108 31.7
A 9 19 347 7.54 115 108 31.7
B 2 9 369 10.04 115 110 25.8
B 14 254 318 8.06 115 110 25.8
B 4 227 301 7.4 115 110 25.8
C 2 191 340 7.13 117 109 32.4
C 12 241 332 6.88 117 109 32.4
C 7 203 302 5.96 117 109 32.4
D 3 14 299 6.4 110 100 31.1
D 1 3 294 6.24 110 100 31.1
D 6 231 289 6.08 110 100 31.1

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