ASTROSAT CZTI

Data Quality Report

Orbit 52550

Creation date: 2025-06-16T00:03:45.659370
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/AS1C09_011T06_9000006478_52550cztM0_level2.fits modeM0/AS1C09_011T06_9000006478_52550cztM0_level2_quad_clean.evt
Size (bytes)809,585,28079,450,560
Size772.1 MB 75.8 MB
Events in quadrant A4,220,567578,062
Events in quadrant B6,245,922601,692
Events in quadrant C6,906,734502,766
Events in quadrant D12,100,101275,905

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0171701
B0229531
C0249881
D0403931

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A64034056.325160%
B64036049.433078%
C6403104416.304857%
D6403348654.443230%

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 7163 6404 314 314 4.38% 4.90%
B 7163 6404 283 283 3.95% 4.42%
C 7163 6404 914 914 12.76% 14.27%
D 7162 6403 3004 3004 41.94% 46.92%

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 15 239 494604 3000.22 659 642 164.6
A 4 159 323026 1958.09 659 642 164.6
A 4 249 276643 1676.37 659 642 164.6
B 4 170 2203253 15749.79 653 630 139.9
B 10 254 403395 2879.96 653 630 139.9
B 10 44 279104 1991.22 653 630 139.9
C 15 224 1861471 10750.47 623 616 173.1
C 15 248 1047181 6046.18 623 616 173.1
C 13 3 812229 4688.82 623 616 173.1
D 6 42 5938251 41791.91 489 466 142.1
D 8 176 1640642 11544.05 489 466 142.1
D 11 176 663317 4665.34 489 466 142.1

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