ASTROSAT CZTI

Data Quality Report

Orbit 20180310_G08_077T01_9000001970_level2

Creation date: 2025-11-20T01:57:02.351849
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_077T01_9000001970cztM0_level2.fits modeM0/AS1G08_077T01_9000001970cztM0_level2_quad_clean.evt
Size (bytes)1,477,368,0001,540,126,080
Size1.4 GB 1.4 GB
Events in quadrant A8,780,7069,201,494
Events in quadrant B7,807,1548,284,187
Events in quadrant C9,167,1489,430,112
Events in quadrant D7,868,7408,628,025

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02370
B02370
C02370
D02370

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A033020
B033020
C033020
D033020

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A04003080
B05152240
C03352120
D03647390

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A16204389755.538653%
B1620432848717.579902%
C16204313650.842369%
D16204334422.124128%

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 185788 161602 0 0 0.00% 0.00%
B 185788 157250 0 0 0.00% 0.00%
C 185788 162042 0 0 0.00% 0.00%
D 185788 162003 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 0 29 8396 10.97 2286 2143 569.8
A 7 110 7216 8.9 2286 2143 569.8
A 0 30 6501 7.65 2286 2143 569.8
B 2 9 7046 12.96 2057 1965 392.1
B 14 254 5164 8.16 2057 1965 392.1
B 3 17 5140 8.1 2057 1965 392.1
C 12 241 6504 6.86 2421 2253 619.3
C 2 191 6152 6.3 2421 2253 619.3
C 3 126 6105 6.22 2421 2253 619.3
D 3 14 5900 6.44 2242 2035 599.7
D 6 231 5722 6.15 2242 2035 599.7
D 7 3 5500 5.78 2242 2035 599.7

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