ASTROSAT CZTI

Data Quality Report

Orbit 51945

Creation date: 2025-05-06T10:45:51.210500
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_9000006468_51945cztM0_level2.fits modeM0/AS1C09_011T06_9000006468_51945cztM0_level2_quad_clean.evt
Size (bytes)897,364,80067,501,440
Size855.8 MB 64.4 MB
Events in quadrant A7,305,839466,330
Events in quadrant B4,035,186631,345
Events in quadrant C9,189,031395,149
Events in quadrant D12,212,468121,890

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0259391
B0164081
C0315481
D0404751

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6133150324.506767%
B61332774.516550%
C6134237738.751223%
D6134497481.089012%

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 7323 6134 1384 1384 18.90% 22.56%
B 7323 6134 122 122 1.67% 1.99%
C 7324 6135 2189 2189 29.89% 35.68%
D 7324 6135 3500 3500 47.79% 57.05%

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 4 159 2469831 17827.49 552 539 138.5
A 7 64 1718121 12400.39 552 539 138.5
A 12 3 441322 3182.31 552 539 138.5
B 4 171 420230 3114.94 633 611 134.7
B 12 32 181696 1344.24 633 611 134.7
B 10 44 171603 1269.32 633 611 134.7
C 15 224 6184809 42124.43 524 519 146.8
C 12 249 288242 1959.83 524 519 146.8
C 13 3 149360 1013.83 524 519 146.8
D 12 17 9055156 128608.86 240 229 70.4
D 6 42 1144949 16258.68 240 229 70.4
D 3 12 304960 4328.15 240 229 70.4

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