ASTROSAT CZTI

Data Quality Report

Orbit 20180724_T02_073T01_9000002252_level2

Creation date: 2025-11-23T17:12:50.226448
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/AS1T02_073T01_9000002252cztM0_level2.fits modeM0/AS1T02_073T01_9000002252cztM0_level2_quad_clean.evt
Size (bytes)518,742,720453,458,880
Size494.7 MB 432.5 MB
Events in quadrant A3,170,0262,630,165
Events in quadrant B3,040,5242,639,650
Events in quadrant C3,136,8202,510,135
Events in quadrant D2,740,0642,329,287

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01060
B01060
C01060
D01060

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A010760
B010760
C010760
D010760

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01112300
B01187030
C01156360
D01122770

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A528044590.869252%
B5280412442.355882%
C528046261.185516%
D528045190.982880%

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 63395 52795 0 0 0.00% 0.00%
B 63395 52798 0 0 0.00% 0.00%
C 63395 52798 0 0 0.00% 0.00%
D 63395 52796 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 3015 11.12 823 773 201.6
A 7 110 2543 8.78 823 773 201.6
A 15 236 2353 7.84 823 773 201.6
B 2 9 2421 10.49 802 766 157.7
B 2 8 2002 7.84 802 766 157.7
B 14 254 1999 7.82 802 766 157.7
C 12 241 2167 6.49 828 774 214.7
C 2 191 2101 6.18 828 774 214.7
C 7 111 2087 6.12 828 774 214.7
D 6 231 2039 6.34 781 711 209.3
D 3 14 2028 6.29 781 711 209.3
D 7 3 1946 5.9 781 711 209.3

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