ASTROSAT CZTI

Data Quality Report

Orbit 50966

Creation date: 2025-03-01T08:18:48.662234
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/AS1C07_001T02_9000006452_50966cztM0_level2.fits modeM0/AS1C07_001T02_9000006452_50966cztM0_level2_quad_clean.evt
Size (bytes)2,105,524,800156,660,480
Size2.0 GB 149.4 MB
Events in quadrant A17,021,4261,022,866
Events in quadrant B13,465,8291,204,176
Events in quadrant C21,343,484813,130
Events in quadrant D24,997,662703,731

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02920
B02920
C02920
D02920

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A040
B040
C040
D040

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0606064
B0502801
C0734451
D0842561

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A14450337523.356401%
B14451254317.597398%
C14451537337.180818%
D14451624343.201163%

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 14845 14451 2791 2791 18.80% 19.31%
B 14846 14452 2224 2224 14.98% 15.39%
C 14846 14452 4752 4752 32.01% 32.88%
D 14846 14451 5763 5763 38.82% 39.88%

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 8 43 6715833 19107.1 1376 1336 351.4
A 14 254 1260874 3584.2 1376 1336 351.4
A 12 80 940607 2672.83 1376 1336 351.4
B 5 236 5646549 19681.83 1354 1302 286.8
B 4 171 1094059 3809.83 1354 1302 286.8
B 8 128 336053 1167.09 1354 1302 286.8
C 15 147 9730811 27635.89 1226 1213 352.1
C 3 242 1814087 5149.28 1226 1213 352.1
C 13 49 680672 1929.93 1226 1213 352.1
D 8 176 14308033 40699.49 1181 1134 351.5
D 15 184 1483211 4216.13 1181 1134 351.5
D 3 12 1072661 3048.22 1181 1134 351.5

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