ASTROSAT CZTI

Data Quality Report

Orbit 20200109_A08_009T01_9000003422_level2

Creation date: 2025-12-08T04:19:00.011354
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/AS1A08_009T01_9000003422cztM0_level2.fits modeM0/AS1A08_009T01_9000003422cztM0_level2_quad_clean.evt
Size (bytes)932,328,000939,314,880
Size889.1 MB 895.8 MB
Events in quadrant A5,712,1945,698,259
Events in quadrant B5,520,0185,777,395
Events in quadrant C5,634,6105,535,953
Events in quadrant D4,795,8304,865,694

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01986950
B02006470
C02083670
D02550160

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A019460
B019480
C019460
D019460

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01330
B01330
C01330
D01330

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A958808960.934501%
B9588810891.135700%
C9588120442.131809%
D9588656505.892414%

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 108997 95887 0 0 0.00% 0.00%
B 108997 95888 0 0 0.00% 0.00%
C 108997 95887 0 0 0.00% 0.00%
D 108997 95774 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 5440 10.88 1489 1399 371.6
A 7 110 4615 8.66 1489 1399 371.6
A 0 30 4278 7.75 1489 1399 371.6
B 2 9 4447 10.84 1459 1395 281.6
B 2 8 3689 8.15 1459 1395 281.6
B 5 128 3664 8.06 1459 1395 281.6
C 12 241 3973 6.88 1490 1398 374.3
C 9 209 3765 6.32 1490 1398 374.3
C 3 187 3764 6.32 1490 1398 374.3
D 3 14 3684 6.59 1372 1247 370.0
D 15 46 3421 5.88 1372 1247 370.0
D 10 189 3399 5.82 1372 1247 370.0

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