ASTROSAT CZTI

Data Quality Report

Orbit 55502

Creation date: 2025-12-31T15:33:17.931486
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/AS1A14_099T01_9000006536_55502cztM0_level2.fits modeM0/AS1A14_099T01_9000006536_55502cztM0_level2_quad_clean.evt
Size (bytes)631,820,16081,552,960
Size602.6 MB 77.8 MB
Events in quadrant A3,416,707599,289
Events in quadrant B7,995,213432,822
Events in quadrant C4,246,233561,126
Events in quadrant D7,237,789434,105

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01291
B01302
C01300
D01302

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01460653
B028376281
C01718683
D02600479

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A63361562.462121%
B6325234837.122530%
C63342513.962741%
D6336143522.648359%

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 7425 6345 79 79 1.06% 1.25%
B 7410 6326 1693 1693 22.85% 26.76%
C 7421 6343 182 182 2.45% 2.87%
D 7421 6346 1375 1375 18.53% 21.67%

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 0 8 334755 2004.28 673 656 166.7
A 3 78 127618 761.65 673 656 166.7
A 3 14 114968 685.77 673 656 166.7
B 5 172 5826732 52422.18 517 498 111.1
B 4 67 99422 890.08 517 498 111.1
B 12 111 13430 116.36 517 498 111.1
C 9 38 1475761 8388.96 643 639 175.8
C 15 147 111943 632.98 643 639 175.8
C 12 252 32251 179.78 643 639 175.8
D 7 70 4339463 26122.26 582 555 166.1
D 11 129 196877 1181.95 582 555 166.1
D 2 153 110292 660.67 582 555 166.1

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