ASTROSAT CZTI

Data Quality Report

Orbit 50855

Creation date: 2025-02-21T19:01:30.047978
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_50855cztM0_level2.fits modeM0/AS1C07_001T01_9000006450_50855cztM0_level2_quad_clean.evt
Size (bytes)490,040,64092,960,640
Size467.3 MB 88.7 MB
Events in quadrant A3,779,476619,936
Events in quadrant B3,627,747671,190
Events in quadrant C5,558,327541,519
Events in quadrant D4,683,436541,962

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01260
B01260
C01260
D01260

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0153891
B0151091
C0207581
D0181931

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A63161802.849905%
B63171943.071078%
C631771311.287003%
D63173425.413962%

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 7426 6316 88 88 1.19% 1.39%
B 7427 6317 60 60 0.81% 0.95%
C 7427 6317 562 562 7.57% 8.90%
D 7427 6317 237 237 3.19% 3.75%

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 7 221 175455 1011.5 687 672 172.8
A 4 191 121024 696.49 687 672 172.8
A 4 3 111961 644.05 687 672 172.8
B 5 172 292803 1996.06 681 653 146.4
B 8 128 254646 1735.36 681 653 146.4
B 0 172 84173 570.64 681 653 146.4
C 4 5 884282 5134.62 634 628 172.1
C 1 29 633709 3678.63 634 628 172.1
C 1 60 389976 2262.37 634 628 172.1
D 2 216 565161 3047.74 655 629 185.2
D 2 249 365473 1969.68 655 629 185.2
D 11 245 166412 895.01 655 629 185.2

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