ASTROSAT CZTI

Data Quality Report

Orbit 51570

Creation date: 2025-04-11T00:18:01.314107
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_51570cztM0_level2.fits modeM0/AS1A13_037T05_9000006460_51570cztM0_level2_quad_clean.evt
Size (bytes)1,889,366,400185,152,320
Size1.8 GB 176.6 MB
Events in quadrant A19,163,7841,202,616
Events in quadrant B13,865,5641,403,926
Events in quadrant C25,303,815696,817
Events in quadrant D10,439,5671,258,930

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0290
B0290
C0290
D0290

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0675334
B0516362
C0855572
D0414932

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03060
B03060
C03060
D03060

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A15123337922.343450%
B15124225014.877017%
C15124802553.061359%
D151249116.023539%

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 17928 15126 2358 2358 13.15% 15.59%
B 17929 15127 1473 1473 8.22% 9.74%
C 17929 15127 6983 6983 38.95% 46.16%
D 17929 15127 597 597 3.33% 3.95%

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 4945626 12880.65 1564 1529 383.8
A 7 64 4050890 10549.63 1564 1529 383.8
A 12 250 1972962 5136.09 1564 1529 383.8
B 10 44 3698047 10769.17 1611 1552 343.2
B 4 81 1744839 5078.8 1611 1552 343.2
B 0 171 461270 1339.32 1611 1552 343.2
C 15 198 18810388 58908.68 1162 1153 319.3
C 3 242 746341 2333.85 1162 1153 319.3
C 13 3 669764 2094.02 1162 1153 319.3
D 8 176 1281365 2857.23 1614 1563 447.9
D 12 6 966753 2154.84 1614 1563 447.9
D 2 249 448892 998.69 1614 1563 447.9

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