ASTROSAT CZTI

Data Quality Report

Orbit 51245

Creation date: 2025-03-20T09:30:09.002719
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/AS1C07_001T01_9000006454_51245cztM0_level2.fits modeM0/AS1C07_001T01_9000006454_51245cztM0_level2_quad_clean.evt
Size (bytes)691,793,28076,320,000
Size659.7 MB 72.8 MB
Events in quadrant A5,025,428555,327
Events in quadrant B3,641,659617,612
Events in quadrant C12,258,385209,005
Events in quadrant D4,205,184499,720

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0192711
B0150131
C0404461
D0168551

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01240
B01240
C01240
D01240

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A61483105.042290%
B61491412.293056%
C6148409066.525699%
D61484196.815224%

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 7128 6149 139 139 1.95% 2.26%
B 7129 6150 58 58 0.81% 0.94%
C 7128 6148 3765 3765 52.82% 61.24%
D 7128 6149 277 277 3.89% 4.50%

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 3 1270263 8024.7 630 616 158.2
A 9 160 250584 1579.9 630 616 158.2
A 12 194 148600 935.32 630 616 158.2
B 10 254 303460 2222.73 640 619 136.2
B 7 252 126679 925.23 640 619 136.2
B 8 128 91811 669.31 640 619 136.2
C 4 12 10600467 120577.42 317 315 87.9
C 13 3 116225 1318.48 317 315 87.9
C 10 171 80991 917.69 317 315 87.9
D 8 176 358327 2097.32 610 588 170.6
D 3 12 341719 1999.95 610 588 170.6
D 2 216 159933 934.19 610 588 170.6

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