ASTROSAT CZTI

Data Quality Report

Orbit 20170526_A03_025T08_9000001248_level2

Creation date: 2025-11-13T20:22:31.071573
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/AS1A03_025T08_9000001248cztM0_level2.fits modeM0/AS1A03_025T08_9000001248cztM0_level2_quad_clean.evt
Size (bytes)462,864,960420,425,280
Size441.4 MB 400.9 MB
Events in quadrant A2,851,5422,506,475
Events in quadrant B2,729,2562,498,546
Events in quadrant C2,708,7382,229,397
Events in quadrant D2,438,4142,210,222

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01050
B01040
C01030
D01050

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01098310
B01055490
C01113370
D01031340

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A09780
B09960
C09980
D09960

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A477799642.017623%
B4794012202.544848%
C4782623094.827918%
D478166071.269450%

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 67311 48973 0 0 0.00% 0.00%
B 67311 49077 0 0 0.00% 0.00%
C 67311 48719 0 0 0.00% 0.00%
D 67311 49041 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 2637 10.4 740 692 187.0
A 7 110 2430 9.29 740 692 187.0
A 0 30 2075 7.4 740 692 187.0
B 2 9 2338 11.4 721 686 144.9
B 14 254 1910 8.45 721 686 144.9
B 3 17 1846 8.01 721 686 144.9
C 1 81 1983 6.98 715 664 188.9
C 1 80 1974 6.93 715 664 188.9
C 12 241 1885 6.46 715 664 188.9
D 10 189 1802 6.28 694 630 186.5
D 6 231 1794 6.24 694 630 186.5
D 3 14 1765 6.09 694 630 186.5

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