ASTROSAT CZTI

Data Quality Report

Orbit 20200804_A09_079T03_9000003790_level2

Creation date: 2025-12-14T04:44:23.286382
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_079T03_9000003790cztM0_level2.fits modeM0/AS1A09_079T03_9000003790cztM0_level2_quad_clean.evt
Size (bytes)2,858,080,3202,695,924,800
Size2.7 GB 2.5 GB
Events in quadrant A17,539,71415,861,114
Events in quadrant B17,003,14816,213,962
Events in quadrant C17,169,87615,556,363
Events in quadrant D14,921,25614,101,674

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A059120
B059100
C059120
D059120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06335360
B06191160
C06805530
D07199640

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04670
B04670
C04670
D04670

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A29085850551.737961%
B29085447021.616619%
C290859119654.113677%
D290853109773.774071%

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 336917 290858 0 0 0.00% 0.00%
B 336917 290840 0 0 0.00% 0.00%
C 336917 290752 0 0 0.00% 0.00%
D 336916 290664 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 14822 9.4 4574 4290 1120.8
A 7 110 14416 9.03 4574 4290 1120.8
A 0 30 13334 8.07 4574 4290 1120.8
B 2 9 13622 10.64 4506 4305 875.6
B 2 8 11249 7.93 4506 4305 875.6
B 5 128 11145 7.81 4506 4305 875.6
C 1 80 13360 7.99 4533 4237 1141.1
C 1 81 13243 7.89 4533 4237 1141.1
C 12 241 11908 6.72 4533 4237 1141.1
D 7 3 10538 5.93 4266 3890 1121.7
D 6 231 10447 5.85 4266 3890 1121.7
D 10 189 10380 5.79 4266 3890 1121.7

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