ASTROSAT CZTI

Data Quality Report

Orbit 59171

Creation date: 2026-09-04T12:38:14.708174
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/AS1T05_271T01_9000006604_59171cztM0_level2.fits modeM0/AS1T05_271T01_9000006604_59171cztM0_level2_quad_clean.evt
Size (bytes)969,975,360177,206,400
Size925.0 MB 169.0 MB
Events in quadrant A5,460,2771,205,350
Events in quadrant B6,677,8981,271,232
Events in quadrant C5,776,2381,153,373
Events in quadrant D17,015,189864,610

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0257421
B0288121
C0266754
D0594231

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A030
B030
C030
D030

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02560
B02560
C02560
D02560

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A12598740.587395%
B125983402.698841%
C12597890.706517%
D12598292323.202096%

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 12837 12599 7 7 0.05% 0.06%
B 12837 12598 97 97 0.76% 0.77%
C 12837 12597 53 53 0.41% 0.42%
D 12837 12597 2746 2746 21.39% 21.80%

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 15 233 26889 75.67 1383 1347 337.5
A 10 251 25643 71.98 1383 1347 337.5
A 13 254 17668 48.35 1383 1347 337.5
B 4 171 831734 2830.66 1359 1305 293.4
B 5 248 123844 417.69 1359 1305 293.4
B 4 236 84870 284.85 1359 1305 293.4
C 14 254 262993 708.76 1346 1334 369.2
C 12 252 100224 267.87 1346 1334 369.2
C 3 233 32527 84.49 1346 1334 369.2
D 12 110 7203657 21499.61 1200 1149 335.0
D 2 31 2607407 7779.73 1200 1149 335.0
D 11 129 1521150 4537.23 1200 1149 335.0

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

TCT plots

Parameter TCT0 TCT_healed
Tct