ASTROSAT CZTI

Data Quality Report

Orbit 50870

Creation date: 2025-02-22T19:25:13.775000
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_9000006450_50870cztM0_level2.fits modeM0/AS1C07_001T01_9000006450_50870cztM0_level2_quad_clean.evt
Size (bytes)634,354,56094,057,920
Size605.0 MB 89.7 MB
Events in quadrant A8,311,612559,994
Events in quadrant B3,717,512699,299
Events in quadrant C5,859,605573,425
Events in quadrant D5,089,226560,938

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0293941
B0153541
C0219111
D0194461

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6507122218.779776%
B65072083.196558%
C650766810.265868%
D65083905.992624%

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 7651 6506 1125 1125 14.70% 17.29%
B 7652 6507 114 114 1.49% 1.75%
C 7652 6507 559 559 7.31% 8.59%
D 7653 6508 331 331 4.33% 5.09%

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 4 3439310 20369.36 679 662 168.8
A 7 206 1093176 6471.67 679 662 168.8
A 8 234 247842 1464.21 679 662 168.8
B 4 206 176585 1184.78 706 683 148.5
B 0 213 147350 987.87 706 683 148.5
B 4 81 118179 791.39 706 683 148.5
C 1 29 1335891 7299.69 664 657 182.9
C 3 233 714093 3900.34 664 657 182.9
C 13 96 281216 1533.81 664 657 182.9
D 2 249 524134 2743.99 682 660 190.8
D 10 24 384091 2009.9 682 660 190.8
D 2 216 195265 1020.1 682 660 190.8

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