ASTROSAT CZTI

Data Quality Report

Orbit 50744

Creation date: 2025-02-14T08:07:09.577831
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_50744cztM0_level2.fits modeM0/AS1C07_001T01_9000006450_50744cztM0_level2_quad_clean.evt
Size (bytes)702,031,680116,038,080
Size669.5 MB 110.7 MB
Events in quadrant A6,084,333748,657
Events in quadrant B5,564,038826,217
Events in quadrant C5,966,807732,314
Events in quadrant D7,736,901635,590

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01680
B01680
C01680
D01680

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02386081
B022412136
C023496104
D029082215

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B050
C050
D050

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A82114175.078553%
B82053093.765996%
C82052953.595369%
D8200100012.195122%

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 8793 8221 310 310 3.53% 3.77%
B 8796 8214 145 145 1.65% 1.77%
C 8795 8221 227 227 2.58% 2.76%
D 8788 8205 889 889 10.12% 10.83%

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 4 495866 2261.92 872 850 218.8
A 6 177 278332 1267.92 872 850 218.8
A 3 161 254664 1159.78 872 850 218.8
B 7 0 881759 4723.15 877 844 186.5
B 10 247 540645 2894.22 877 844 186.5
B 5 172 138748 739.39 877 844 186.5
C 12 247 732950 3076.34 857 847 238.0
C 9 38 426150 1787.15 857 847 238.0
C 5 10 284383 1191.44 857 847 238.0
D 15 174 1480335 6391.84 811 780 231.5
D 2 216 778416 3359.47 811 780 231.5
D 2 249 520055 2243.33 811 780 231.5

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