ASTROSAT CZTI

Data Quality Report

Orbit 51228

Creation date: 2025-03-19T00:34:32.945301
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_9000006454_51228cztM0_level2.fits modeM0/AS1C07_001T01_9000006454_51228cztM0_level2_quad_clean.evt
Size (bytes)3,642,986,880565,191,360
Size3.4 GB 539.0 MB
Events in quadrant A30,824,4303,705,215
Events in quadrant B34,715,4793,815,299
Events in quadrant C38,395,7163,290,737
Events in quadrant D27,677,7743,417,086

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01203634
B01322795
C01431784
D01120894

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08480
B08460
C08460
D08460

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200
B0200
C0200
D0200

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A4198621725.173153%
B41986499811.903968%
C41986626214.914495%
D4198617044.058496%

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 43930 41987 1395 1395 3.18% 3.32%
B 43930 41987 3461 3461 7.88% 8.24%
C 43930 41988 5678 5678 12.93% 13.52%
D 43930 41988 1573 1573 3.58% 3.75%

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 12 3 4376415 4100.73 4337 4237 1066.2
A 9 160 1762252 1648.87 4337 4237 1066.2
A 8 26 1445094 1351.4 4337 4237 1066.2
B 5 185 5773783 6530.78 4186 4041 883.5
B 6 255 2801659 3166.63 4186 4041 883.5
B 12 32 2181295 2464.44 4186 4041 883.5
C 4 12 13755587 12576.36 3968 3942 1093.5
C 1 60 1583511 1444.57 3968 3942 1093.5
C 4 13 1547406 1411.55 3968 3942 1093.5
D 3 12 1597760 1355.18 4195 4052 1176.0
D 8 176 1373131 1164.17 4195 4052 1176.0
D 10 172 1170869 992.18 4195 4052 1176.0

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