ASTROSAT CZTI

Data Quality Report

Orbit 20170330_A03_051T01_9000001120_level2

Creation date: 2025-11-10T09:30:25.853484
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_051T01_9000001120cztM0_level2.fits modeM0/AS1A03_051T01_9000001120cztM0_level2_quad_clean.evt
Size (bytes)573,912,000582,376,320
Size547.3 MB 555.4 MB
Events in quadrant A3,451,9183,500,819
Events in quadrant B3,356,0083,522,283
Events in quadrant C3,405,2163,338,829
Events in quadrant D2,942,1583,050,565

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0780
B0780
C0780
D0780

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A012560
B012560
C012560
D012540

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280710
B01295550
C01271490
D01338650

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A615687211.171063%
B616049081.473930%
C615976070.985438%
D615787601.234207%

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 69758 61714 0 0 0.00% 0.00%
B 69758 61730 0 0 0.00% 0.00%
C 69758 61723 0 0 0.00% 0.00%
D 69758 61706 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 3363 11.22 894 835 225.2
A 14 188 3298 10.94 894 835 225.2
A 7 110 2904 9.19 894 835 225.2
B 2 9 2940 11.85 885 840 177.2
B 3 17 2282 8.14 885 840 177.2
B 2 8 2278 8.11 885 840 177.2
C 1 80 2578 7.32 899 831 238.5
C 1 81 2507 7.03 899 831 238.5
C 2 191 2302 6.17 899 831 238.5
D 3 14 2222 6.52 836 759 224.5
D 6 231 2109 6.01 836 759 224.5
D 11 82 2095 5.95 836 759 224.5

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