ASTROSAT CZTI

Data Quality Report

Orbit 51655

Creation date: 2025-04-22T09:21:53.458144
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/AS1A13_037T05_9000006460_51655cztM0_level2.fits modeM0/AS1A13_037T05_9000006460_51655cztM0_level2_quad_clean.evt
Size (bytes)535,345,92089,467,200
Size510.5 MB 85.3 MB
Events in quadrant A4,832,055576,915
Events in quadrant B7,170,633559,536
Events in quadrant C3,926,417582,391
Events in quadrant D3,404,455556,169

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0185571
B0255181
C0160311
D0144211

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A621963210.162406%
B6219140222.543817%
C62193475.579675%
D62191672.685319%

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 7324 6220 450 450 6.14% 7.23%
B 7324 6219 1025 1025 14.00% 16.48%
C 7324 6219 195 195 2.66% 3.14%
D 7324 6220 79 79 1.08% 1.27%

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 64 1438061 8660.97 674 659 166.0
A 12 3 208044 1249.59 674 659 166.0
A 13 248 154109 924.6 674 659 166.0
B 10 44 3103796 22745.95 643 622 136.4
B 1 223 345547 2528.27 643 622 136.4
B 5 172 307161 2246.9 643 622 136.4
C 15 189 589961 3244.71 670 665 181.6
C 12 254 231429 1270.6 670 665 181.6
C 0 209 145337 796.57 670 665 181.6
D 3 12 186179 991.59 678 654 187.1
D 0 146 144813 770.5 678 654 187.1
D 8 176 132917 706.92 678 654 187.1

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