ASTROSAT CZTI

Data Quality Report

Orbit 51771

Creation date: 2025-04-24T12:10:22.596518
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_9000006464_51771cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51771cztM0_level2_quad_clean.evt
Size (bytes)591,710,40089,164,800
Size564.3 MB 85.0 MB
Events in quadrant A4,145,847608,279
Events in quadrant B5,175,697632,500
Events in quadrant C4,652,130584,414
Events in quadrant D7,448,105441,237

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0163401
B0196611
C0178271
D0263421

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A62092113.398293%
B62095498.842004%
C62103094.975845%
D6210151124.331723%

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 7364 6210 139 139 1.89% 2.24%
B 7364 6210 304 304 4.13% 4.90%
C 7365 6211 268 268 3.64% 4.31%
D 7365 6211 1302 1302 17.68% 20.96%

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 11 3 397279 2403.55 683 671 165.0
A 2 143 263377 1592.07 683 671 165.0
A 8 249 130351 785.9 683 671 165.0
B 4 206 1770413 12543.32 665 642 141.1
B 4 174 277645 1963.27 665 642 141.1
B 1 239 89439 629.35 665 642 141.1
C 1 243 524842 2865.22 670 663 182.9
C 15 232 400798 2187.18 670 663 182.9
C 15 218 264414 1441.69 670 663 182.9
D 11 129 4020295 24034.48 601 580 167.2
D 7 222 617908 3691.1 601 580 167.2
D 3 12 138089 822.19 601 580 167.2

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