ASTROSAT CZTI

Data Quality Report

Orbit 55275

Creation date: 2025-12-16T09:50:42.646409
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/AS1A14_009T01_9000006534_55275cztM0_level2.fits modeM0/AS1A14_009T01_9000006534_55275cztM0_level2_quad_clean.evt
Size (bytes)561,098,880115,534,080
Size535.1 MB 110.2 MB
Events in quadrant A5,983,758733,193
Events in quadrant B4,734,350792,096
Events in quadrant C4,612,014723,519
Events in quadrant D4,806,926682,673

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01660
B01660
C01660
D01660

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0235282
B0200522
C0197172
D0201332

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A81574135.063136%
B81573514.303053%
C81571882.304769%
D81572002.451882%

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 9372 8159 251 251 2.68% 3.08%
B 9372 8159 118 118 1.26% 1.45%
C 9372 8159 100 100 1.07% 1.23%
D 9372 8159 106 106 1.13% 1.30%

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 12 115 2193899 10508.15 857 831 208.7
A 0 8 143911 685.57 857 831 208.7
A 3 14 83465 395.94 857 831 208.7
B 1 159 514582 2777.93 859 824 184.9
B 5 185 324493 1750.1 859 824 184.9
B 4 81 164463 884.81 859 824 184.9
C 15 147 484458 2089.64 851 843 231.4
C 13 3 423411 1825.87 851 843 231.4
C 3 208 75322 321.81 851 843 231.4
D 11 129 747010 3119.88 844 807 239.2
D 11 176 162927 677.82 844 807 239.2
D 7 96 142681 593.18 844 807 239.2

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