ASTROSAT CZTI

Data Quality Report

Orbit 20180512_G08_024T02_9000002094_level2

Creation date: 2025-11-22T08:26:43.436260
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/AS1G08_024T02_9000002094cztM0_level2.fits modeM0/AS1G08_024T02_9000002094cztM0_level2_quad_clean.evt
Size (bytes)438,572,160403,139,520
Size418.3 MB 384.5 MB
Events in quadrant A2,723,8642,357,314
Events in quadrant B2,582,4862,290,750
Events in quadrant C2,695,2322,419,301
Events in quadrant D2,349,1602,209,598

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0896550
B01056010
C0898700
D01053890

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A08660
B08660
C08660
D08660

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0960
B0960
C0960
D0960

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A427166061.418672%
B4271819744.621003%
C427184721.104921%
D427186111.430310%

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 51512 42715 0 0 0.00% 0.00%
B 51512 42714 0 0 0.00% 0.00%
C 51512 42716 0 0 0.00% 0.00%
D 51512 42716 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 0 29 2531 10.82 707 664 172.5
A 7 110 2245 9.17 707 664 172.5
A 9 19 2004 7.77 707 664 172.5
B 2 9 2232 11.68 680 650 135.5
B 2 8 1727 7.95 680 650 135.5
B 5 128 1695 7.71 680 650 135.5
C 1 81 2031 7.36 712 667 185.4
C 1 80 2016 7.28 712 667 185.4
C 12 241 1833 6.29 712 667 185.4
D 6 231 1718 6.19 670 612 178.6
D 10 189 1678 5.97 670 612 178.6
D 1 19 1567 5.35 670 612 178.6

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