ASTROSAT CZTI

Data Quality Report

Orbit 51515

Creation date: 2025-04-07T07:13:48.133935
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_51515cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51515cztM0_level2_quad_clean.evt
Size (bytes)884,367,360108,120,960
Size843.4 MB 103.1 MB
Events in quadrant A8,432,828648,660
Events in quadrant B5,379,551830,812
Events in quadrant C8,716,004622,620
Events in quadrant D9,571,045598,584

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0308420
B0216000
C0315400
D0341690

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01640
B01640
C01640
D01640

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8244154018.680252%
B82441842.231926%
C8244149618.146531%
D8244134816.351286%

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 8244 8244 804 804 9.75% 9.75%
B 8244 8244 45 45 0.55% 0.55%
C 8244 8243 1320 1320 16.01% 16.01%
D 8244 8244 1237 1237 15.00% 15.00%

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 12 250 3442578 16775.05 831 811 205.2
A 4 249 359784 1749.62 831 811 205.2
A 7 64 307935 1496.91 831 811 205.2
B 15 52 340000 1774.33 886 855 191.1
B 10 254 271689 1416.94 886 855 191.1
B 5 172 269104 1403.42 886 855 191.1
C 15 1 3424365 15132.88 807 800 226.2
C 15 205 1034806 4570.53 807 800 226.2
C 13 3 333989 1472.77 807 800 226.2
D 11 176 2035170 9020.23 813 784 225.5
D 8 176 1766031 7826.9 813 784 225.5
D 1 3 730384 3234.96 813 784 225.5

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