ASTROSAT CZTI

Data Quality Report

Orbit 53151

Creation date: 2025-07-26T10:00:59.109755
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_011T07_9000006488_53151cztM0_level2.fits modeM0/AS1C09_011T07_9000006488_53151cztM0_level2_quad_clean.evt
Size (bytes)501,007,68097,018,560
Size477.8 MB 92.5 MB
Events in quadrant A3,558,518647,295
Events in quadrant B3,528,997688,095
Events in quadrant C6,654,401557,289
Events in quadrant D4,288,940583,197

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0180
C0180
D0180

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0154543
B0155312
C0243562
D0176562

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66261271.916692%
B66262343.531542%
C662687813.250830%
D66261342.022336%

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 7836 6627 93 93 1.19% 1.40%
B 7836 6627 92 92 1.17% 1.39%
C 7836 6627 766 766 9.78% 11.56%
D 7836 6627 102 102 1.30% 1.54%

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 12 115 259788 1495.34 683 664 173.3
A 15 174 248736 1431.57 683 664 173.3
A 6 211 59638 340.33 683 664 173.3
B 2 249 377439 2657.21 676 653 141.8
B 4 81 180826 1270.64 676 653 141.8
B 4 171 74766 522.67 676 653 141.8
C 15 224 1538194 8721.79 635 629 176.3
C 13 3 870810 4936.07 635 629 176.3
C 0 240 678711 3846.4 635 629 176.3
D 15 125 466074 2463.16 654 624 189.0
D 2 120 227965 1203.09 654 624 189.0
D 3 12 209819 1107.06 654 624 189.0

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