ASTROSAT CZTI

Data Quality Report

Orbit 00839

Creation date: 2024-06-27T14:03:38.727994
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/AS1P01_165T02_9000000116_00839cztM0_level2.evt modeM0/AS1P01_165T02_9000000116_00839cztM0_level2_quad_clean.evt
Size (bytes)1,042,758,72072,011,520
Size994.5 MB 68.7 MB
Events in quadrant A8,052,905439,505
Events in quadrant B8,093,296438,830
Events in quadrant C7,609,040436,450
Events in quadrant D7,412,129430,571

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0200
B0200
C0200
D0200

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0283700
B0283960
C0270430
D0264650

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6237250.400834%
B6237330.529101%
C6236160.256575%
D6236500.801796%

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 7582 6238 411 411 5.42% 6.59%
B 7582 6238 355 355 4.68% 5.69%
C 7581 6237 242 242 3.19% 3.88%
D 7581 6237 319 319 4.21% 5.11%

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 15 127 356464 748.12 1973 1986 473.8
A 15 171 81350 167.5 1973 1986 473.8
A 0 253 29952 59.02 1973 1986 473.8
B 5 191 42533 84.41 2075 2086 479.2
B 0 220 39074 77.19 2075 2086 479.2
B 4 222 38232 75.43 2075 2086 479.2
C 8 208 60193 111.22 1903 1970 523.5
C 10 34 39101 70.93 1903 1970 523.5
C 3 111 29629 52.83 1903 1970 523.5
D 13 200 268421 478.55 1829 1889 557.0
D 2 16 73909 129.31 1829 1889 557.0
D 12 188 55660 96.54 1829 1889 557.0

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