ASTROSAT CZTI

Data Quality Report

Orbit 51698

Creation date: 2025-04-22T12:01:13.775639
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_031T01_9000006462_51698cztM0_level2.fits modeM0/AS1A13_031T01_9000006462_51698cztM0_level2_quad_clean.evt
Size (bytes)1,093,515,840225,267,840
Size1.0 GB 214.8 MB
Events in quadrant A9,822,2561,485,367
Events in quadrant B8,271,9051,604,863
Events in quadrant C12,330,0961,332,421
Events in quadrant D8,841,7741,317,786

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0340
B0340
C0340
D0340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040355577
B036090403
C0486181019
D038364854

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03226
B03224
C03222
D03222

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A156762641.684103%
B156894032.568679%
C1563014159.053103%
D156423772.410178%

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 19146 15831 52 52 0.27% 0.33%
B 19147 15845 123 123 0.64% 0.78%
C 19147 15820 1066 1066 5.57% 6.74%
D 19147 15827 238 238 1.24% 1.50%

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 3 14 1524466 3747.38 1677 1634 406.4
A 9 191 901213 2213.68 1677 1634 406.4
A 4 3 172372 420.15 1677 1634 406.4
B 8 128 394012 1102.31 1664 1604 356.0
B 1 223 323906 905.37 1664 1604 356.0
B 10 41 254835 711.35 1664 1604 356.0
C 15 189 2537985 5855.78 1580 1570 433.1
C 0 192 1641135 3785.24 1580 1570 433.1
C 15 231 507678 1168.44 1580 1570 433.1
D 3 12 581805 1310.34 1604 1546 442.8
D 15 107 364238 819.03 1604 1546 442.8
D 6 228 289799 650.93 1604 1546 442.8

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