ASTROSAT CZTI

Data Quality Report

Orbit 51630

Creation date: 2025-04-15T13:22:32.799026
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_51630cztM0_level2.fits modeM0/AS1A13_037T05_9000006460_51630cztM0_level2_quad_clean.evt
Size (bytes)760,717,440112,896,000
Size725.5 MB 107.7 MB
Events in quadrant A9,947,637638,688
Events in quadrant B5,217,788810,439
Events in quadrant C6,707,103708,724
Events in quadrant D5,646,370685,226

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010
B010
C010
D010

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0353082
B0210742
C0256962
D0224602

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01700
B01700
C01700
D01680

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A8270191523.155985%
B82714965.996856%
C82717509.067827%
D82714325.223069%

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 8400 8273 1229 1229 14.63% 14.86%
B 8400 8273 106 106 1.26% 1.28%
C 8400 8273 499 499 5.94% 6.03%
D 8400 8273 281 281 3.35% 3.40%

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 7 64 3179120 14826.34 877 853 214.4
A 12 3 1261562 5881.1 877 853 214.4
A 12 250 771289 3594.02 877 853 214.4
B 10 44 336289 1660.34 934 899 202.0
B 1 207 252674 1246.41 934 899 202.0
B 0 171 173880 856.34 934 899 202.0
C 9 38 699856 2833.58 899 893 246.7
C 15 189 521087 2108.86 899 893 246.7
C 10 19 392914 1589.25 899 893 246.7
D 8 176 640403 2558.93 905 871 249.9
D 10 172 416533 1663.17 905 871 249.9
D 3 12 235368 938.28 905 871 249.9

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