ASTROSAT CZTI

Data Quality Report

Orbit 51275

Creation date: 2025-03-22T15:46:02.732857
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_51275cztM0_level2.fits modeM0/AS1C07_001T01_9000006454_51275cztM0_level2_quad_clean.evt
Size (bytes)664,110,72090,383,040
Size633.3 MB 86.2 MB
Events in quadrant A5,407,816614,017
Events in quadrant B3,845,153676,894
Events in quadrant C10,060,204446,243
Events in quadrant D4,768,052547,156

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0207012
B0158762
C0343605
D0189182

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01300
B01300
C01300
D01300

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0180
B0190
C0190
D0190

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A64871892.913519%
B64871642.528133%
C6486208632.161579%
D64864256.552575%

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 7567 6487 91 91 1.20% 1.40%
B 7567 6487 73 73 0.96% 1.13%
C 7566 6486 2064 2064 27.28% 31.82%
D 7566 6487 327 327 4.32% 5.04%

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 1654914 9774.4 682 665 169.2
A 9 160 306432 1806.67 682 665 169.2
A 12 194 193820 1141.29 682 665 169.2
B 10 254 289156 1981.52 688 664 145.6
B 5 185 260123 1782.11 688 664 145.6
B 10 247 156107 1067.67 688 664 145.6
C 4 12 3997724 23753.84 606 600 168.3
C 10 171 3266732 19409.75 606 600 168.3
C 5 10 94176 556.1 606 600 168.3
D 8 176 1158239 6230.81 658 633 185.8
D 2 216 302483 1624.71 658 633 185.8
D 2 249 241339 1295.6 658 633 185.8

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