ASTROSAT CZTI

Data Quality Report

Orbit 20180407_G08_075T01_9000002024_level2

Creation date: 2025-11-21T14:40:40.698173
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/AS1G08_075T01_9000002024cztM0_level2.fits modeM0/AS1G08_075T01_9000002024cztM0_level2_quad_clean.evt
Size (bytes)360,244,800375,140,160
Size343.6 MB 357.8 MB
Events in quadrant A2,156,1862,188,082
Events in quadrant B2,066,8882,156,792
Events in quadrant C2,177,9142,288,482
Events in quadrant D1,869,9042,089,664

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0390
B0390
C0390
D0390

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0838350
B0868060
C0799920
D0936760

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07840
B07840
C07840
D07840

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A384138922.322131%
B3841311993.121339%
C384135421.410981%
D3841310432.715227%

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 42348 38410 0 0 0.00% 0.00%
B 42348 38411 0 0 0.00% 0.00%
C 42348 38413 0 0 0.00% 0.00%
D 42348 38412 0 0 0.00% 0.00%

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 14 188 2247 12.02 560 523 143.4
A 0 29 2100 11.0 560 523 143.4
A 14 204 1912 9.69 560 523 143.4
B 2 9 1818 11.86 544 516 109.7
B 14 254 1460 8.6 544 516 109.7
B 3 17 1398 8.04 544 516 109.7
C 12 250 1596 7.15 573 534 148.6
C 1 65 1538 6.76 573 534 148.6
C 2 191 1516 6.61 573 534 148.6
D 4 246 1426 6.5 533 486 144.7
D 3 14 1426 6.5 533 486 144.7
D 10 189 1370 6.11 533 486 144.7

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