ASTROSAT CZTI

Data Quality Report

Orbit 51538

Creation date: 2025-04-08T19:33:18.770130
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_51538cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51538cztM0_level2_quad_clean.evt
Size (bytes)887,783,04075,516,480
Size846.7 MB 72.0 MB
Events in quadrant A9,408,738446,156
Events in quadrant B4,156,708663,045
Events in quadrant C4,790,828578,642
Events in quadrant D14,013,532153,638

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0324001
B0165971
C0184611
D0460391

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6372221234.714375%
B63732754.315079%
C63733495.476228%
D6373494777.624353%

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 7417 6372 1509 1509 20.35% 23.68%
B 7418 6373 99 99 1.33% 1.55%
C 7418 6373 191 191 2.57% 3.00%
D 7418 6373 4300 4300 57.97% 67.47%

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 2244303 14119.12 638 622 158.9
A 12 3 1629343 10249.28 638 622 158.9
A 7 64 1431242 9002.66 638 622 158.9
B 5 185 355621 2356.62 706 682 150.6
B 0 171 213859 1415.39 706 682 150.6
B 15 52 174843 1156.34 706 682 150.6
C 3 233 764216 4040.25 688 680 189.0
C 13 3 700558 3703.41 688 680 189.0
C 3 242 419807 2217.81 688 680 189.0
D 8 176 11754935 117010.92 361 348 100.5
D 12 6 577187 5742.14 361 348 100.5
D 8 160 46777 462.18 361 348 100.5

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