ASTROSAT CZTI

Data Quality Report

Orbit 51643

Creation date: 2025-04-15T23:21:49.313515
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/AS1A13_037T05_9000006460_51643cztM0_level2.fits modeM0/AS1A13_037T05_9000006460_51643cztM0_level2_quad_clean.evt
Size (bytes)542,992,320103,314,240
Size517.8 MB 98.5 MB
Events in quadrant A5,146,882660,751
Events in quadrant B4,991,289715,505
Events in quadrant C5,153,821637,704
Events in quadrant D4,247,895611,916

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A060
B060
C060
D060

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0202601
B0196901
C0203311
D0176171

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01460
B01460
C01460
D01460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A72133364.658256%
B72143735.170502%
C72144586.348766%
D72141952.703077%

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 7813 7214 153 153 1.96% 2.12%
B 7814 7215 147 147 1.88% 2.04%
C 7814 7215 320 320 4.10% 4.44%
D 7814 7215 117 117 1.50% 1.62%

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 12 3 451813 2320.12 794 774 194.4
A 4 175 335307 1720.82 794 774 194.4
A 12 250 246183 1262.37 794 774 194.4
B 5 172 520174 3102.78 788 761 167.4
B 0 171 284909 1697.39 788 761 167.4
B 5 185 214386 1276.12 788 761 167.4
C 15 189 967088 4609.97 769 764 209.6
C 10 19 502702 2394.56 769 764 209.6
C 12 254 227245 1080.46 769 764 209.6
D 8 176 686317 3162.06 776 747 216.8
D 2 249 160335 736.07 776 747 216.8
D 1 3 115122 527.53 776 747 216.8

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