ASTROSAT CZTI

Data Quality Report

Orbit 51726

Creation date: 2025-04-22T12:01:27.469225
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/AS1A13_031T01_9000006462_51726cztM0_level2.fits modeM0/AS1A13_031T01_9000006462_51726cztM0_level2_quad_clean.evt
Size (bytes)507,461,760103,979,520
Size484.0 MB 99.2 MB
Events in quadrant A3,518,443698,827
Events in quadrant B3,961,520746,917
Events in quadrant C4,458,522674,909
Events in quadrant D6,289,001528,841

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220
B0220
C0220
D0220

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0154422
B0168612
C0183612
D0236822

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01480
B01480
C01480
D01480

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7164560.781686%
B71642012.805695%
C71641882.624232%
D7165122917.152826%

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 9369 7166 20 20 0.21% 0.28%
B 9369 7166 115 115 1.23% 1.60%
C 9369 7166 144 144 1.54% 2.01%
D 9369 7166 1142 1142 12.19% 15.94%

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 3 78685 414.01 772 755 188.2
A 5 240 71174 374.11 772 755 188.2
A 0 111 47645 249.11 772 755 188.2
B 6 51 199977 1234.38 764 738 161.4
B 9 223 163132 1006.11 764 738 161.4
B 1 223 144467 890.47 764 738 161.4
C 0 192 573067 2804.89 748 741 204.0
C 13 3 293493 1434.74 748 741 204.0
C 15 231 191945 937.07 748 741 204.0
D 2 249 1526709 8041.48 675 653 189.8
D 11 129 1389439 7318.15 675 653 189.8
D 8 176 209565 1100.85 675 653 189.8

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