ASTROSAT CZTI

Data Quality Report

Orbit 51505

Creation date: 2025-04-07T15:57:32.410458
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_090T01_9000006458_51505cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51505cztM0_level2_quad_clean.evt
Size (bytes)2,395,108,800228,882,240
Size2.2 GB 218.3 MB
Events in quadrant A16,672,2411,625,266
Events in quadrant B35,012,362937,980
Events in quadrant C14,649,9591,624,273
Events in quadrant D20,830,5471,404,552

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0628933
B01173833
C0567223
D07530510

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A070
B070
C070
D070

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03940
B03940
C03940
D03940

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A19405219611.316671%
B194061082155.761105%
C1940614577.507987%
D19405236612.192734%

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 20030 19407 1619 1619 8.08% 8.34%
B 20031 19406 9446 9446 47.16% 48.68%
C 20031 19407 1174 1174 5.86% 6.05%
D 20031 19406 2259 2259 11.28% 11.64%

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 12 250 3060386 6157.54 2028 1977 496.7
A 15 174 1319870 2653.33 2028 1977 496.7
A 8 43 1307331 2628.09 2028 1977 496.7
B 4 81 26129760 76835.51 1586 1528 340.1
B 2 208 773936 2271.43 1586 1528 340.1
B 0 171 404014 1183.59 1586 1528 340.1
C 15 205 2335551 4209.73 2016 2003 554.3
C 12 247 985598 1774.41 2016 2003 554.3
C 0 177 915671 1648.26 2016 2003 554.3
D 8 176 7921275 14521.97 1954 1886 545.3
D 7 60 1535396 2812.03 1954 1886 545.3
D 6 42 1462606 2678.56 1954 1886 545.3

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