ASTROSAT CZTI

Data Quality Report

Orbit 51579

Creation date: 2025-04-11T14:10:04.352730
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_51579cztM0_level2.fits modeM0/AS1A13_037T05_9000006460_51579cztM0_level2_quad_clean.evt
Size (bytes)904,979,520122,558,400
Size863.1 MB 116.9 MB
Events in quadrant A12,322,932657,453
Events in quadrant B4,800,885918,539
Events in quadrant C8,201,217776,758
Events in quadrant D7,471,321725,969

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0448111852
B021379570
C031526804
D029353768

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01895
B01896
C01904
D01904

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A9041237426.258157%
B91261922.103879%
C91037818.579589%
D91156316.922655%

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 9322 9112 1576 1576 16.91% 17.30%
B 9329 9184 37 37 0.40% 0.40%
C 9333 9168 736 736 7.89% 8.03%
D 9310 9167 613 613 6.58% 6.69%

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 3 2831893 12796.4 890 870 221.2
A 7 64 2308623 10431.19 890 870 221.2
A 12 250 1524717 6887.88 890 870 221.2
B 0 171 211403 1003.06 982 946 209.8
B 4 216 100562 474.78 982 946 209.8
B 0 213 91397 431.1 982 946 209.8
C 15 198 2505010 9591.18 947 939 261.1
C 13 3 940865 3600.14 947 939 261.1
C 9 38 255463 974.88 947 939 261.1
D 8 176 1012635 3885.87 932 900 260.4
D 7 60 681527 2614.15 932 900 260.4
D 12 6 536235 2056.12 932 900 260.4

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