ASTROSAT CZTI

Data Quality Report

Orbit 20151115_P01_147T01_9000000106_level2

Creation date: 2025-10-23T12:48:57.766622
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_147T01_9000000106cztM0_level2.fits modeM0/AS1P01_147T01_9000000106cztM0_level2_quad_clean.evt
Size (bytes)555,255,360570,493,440
Size529.5 MB 544.1 MB
Events in quadrant A3,198,4823,325,394
Events in quadrant B3,191,4423,346,992
Events in quadrant C3,134,5063,156,561
Events in quadrant D2,670,0122,828,177

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0830
B0830
C0830
D0830

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A013660
B013660
C013640
D013640

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02881850
B03028630
C02980340
D03145550

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A674154420.655640%
B673924470.663283%
C673302680.398040%
D6739921013.117257%

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 82532 67475 0 0 0.00% 0.00%
B 82531 67459 0 0 0.00% 0.00%
C 82532 67397 0 0 0.00% 0.00%
D 82532 67451 0 0 0.00% 0.00%

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 7 110 3052 11.55 830 771 197.5
A 0 29 2920 10.88 830 771 197.5
A 14 188 2331 7.9 830 771 197.5
B 2 9 2499 10.99 842 798 154.7
B 14 254 2078 8.27 842 798 154.7
B 2 18 1983 7.66 842 798 154.7
C 2 191 2211 7.01 829 764 206.6
C 12 241 2156 6.74 829 764 206.6
C 9 242 2062 6.28 829 764 206.6
D 6 231 1997 7.18 760 695 181.3
D 15 30 1897 6.63 760 695 181.3
D 6 44 1896 6.62 760 695 181.3

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