ASTROSAT CZTI

Data Quality Report

Orbit 51805

Creation date: 2025-04-26T19:28:23.169597
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_51805cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51805cztM0_level2_quad_clean.evt
Size (bytes)721,175,040110,557,440
Size687.8 MB 105.4 MB
Events in quadrant A5,676,125723,727
Events in quadrant B6,884,326764,482
Events in quadrant C5,860,953687,022
Events in quadrant D7,658,287618,110

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01600
B01600
C01600
D01600

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0221930
B0259170
C0229120
D0282352

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A79652142.686755%
B79665767.230731%
C79663394.255586%
D796589211.198996%

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 7965 7965 190 190 2.39% 2.39%
B 7966 7966 489 489 6.14% 6.14%
C 7966 7966 293 293 3.68% 3.68%
D 7965 7965 884 884 11.10% 11.10%

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 603621 2899.68 852 831 207.9
A 11 3 387635 1860.69 852 831 207.9
A 4 175 342524 1643.69 852 831 207.9
B 10 128 1597572 8836.94 835 806 180.7
B 4 206 518123 2862.97 835 806 180.7
B 10 44 362553 2002.01 835 806 180.7
C 10 22 887399 3953.18 821 814 224.3
C 15 199 483905 2154.05 821 814 224.3
C 3 233 297360 1322.27 821 814 224.3
D 11 129 3232227 14602.36 800 773 221.3
D 0 18 267665 1206.03 800 773 221.3
D 3 12 211616 952.76 800 773 221.3

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