ASTROSAT CZTI

Data Quality Report

Orbit 50876

Creation date: 2025-02-23T05:44:52.544944
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/AS1C07_001T01_9000006450_50876cztM0_level2.fits modeM0/AS1C07_001T01_9000006450_50876cztM0_level2_quad_clean.evt
Size (bytes)731,116,800113,002,560
Size697.2 MB 107.8 MB
Events in quadrant A6,592,239742,812
Events in quadrant B4,360,230835,200
Events in quadrant C8,419,004607,210
Events in quadrant D7,055,573665,076

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01640
B01640
C01640
D01640

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0253050
B0186570
C0308630
D0266590

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A82205026.107056%
B82201491.812652%
C8220160219.489051%
D82194966.034797%

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 8220 8220 223 223 2.71% 2.71%
B 8220 8220 83 83 1.01% 1.01%
C 8220 8220 1134 1134 13.80% 13.80%
D 8219 8219 485 485 5.90% 5.90%

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 4 156 668530 3070.69 871 849 217.4
A 7 206 519899 2387.13 871 849 217.4
A 4 4 388746 1783.95 871 849 217.4
B 4 206 257813 1370.81 880 846 187.5
B 4 170 166776 885.17 880 846 187.5
B 4 81 136164 721.86 880 846 187.5
C 4 210 1614032 7505.59 782 777 214.9
C 15 147 900061 4183.87 782 777 214.9
C 1 29 872514 4055.71 782 777 214.9
D 15 185 525977 2272.62 841 814 231.1
D 2 216 466749 2016.32 841 814 231.1
D 2 249 464696 2007.43 841 814 231.1

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