ASTROSAT CZTI

Data Quality Report

Orbit 51876

Creation date: 2025-05-01T14:10:39.158905
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/AS1C09_011T05_9000006466_51876cztM0_level2.fits modeM0/AS1C09_011T05_9000006466_51876cztM0_level2_quad_clean.evt
Size (bytes)751,887,36091,517,760
Size717.1 MB 87.3 MB
Events in quadrant A6,692,873607,553
Events in quadrant B5,434,394673,163
Events in quadrant C3,768,435627,318
Events in quadrant D11,390,708371,555

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01420
B01420
C01420
D01420

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0247701
B0210871
C0166451
D0387121

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010
B010
C010
D010

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A70526729.529212%
B70535377.613781%
C70531792.537927%
D7053294441.741103%

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 7142 7053 416 416 5.82% 5.90%
B 7143 7054 162 162 2.27% 2.30%
C 7143 7054 102 102 1.43% 1.45%
D 7143 7054 2569 2569 35.97% 36.42%

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 4 175 1290405 7117.34 731 713 181.2
A 11 3 961556 5302.54 731 713 181.2
A 12 3 661078 3644.31 731 713 181.2
B 4 170 1508954 9549.34 730 702 157.9
B 1 255 202161 1275.51 730 702 157.9
B 12 32 142235 896.1 730 702 157.9
C 15 178 340627 1719.77 719 713 197.7
C 15 192 193713 976.47 719 713 197.7
C 13 3 122982 618.61 719 713 197.7
D 11 129 6427226 39527.95 582 559 162.6
D 6 42 1516208 9322.17 582 559 162.6
D 8 176 541852 3329.28 582 559 162.6

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