ASTROSAT CZTI

Data Quality Report

Orbit 52501

Creation date: 2025-06-13T15:40:21.946772
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_037T01_9000006476_52501cztM0_level2.fits modeM0/AS1A13_037T01_9000006476_52501cztM0_level2_quad_clean.evt
Size (bytes)747,279,360103,939,200
Size712.7 MB 99.1 MB
Events in quadrant A3,727,301714,044
Events in quadrant B8,822,890676,134
Events in quadrant C7,234,994628,055
Events in quadrant D7,291,088601,860

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0165290
B0314590
C0267310
D0269350

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01500
B01500
C01500
D01500

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A7577971.280190%
B7577132017.421143%
C757880810.662444%
D75785166.809184%

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 7577 7577 42 42 0.55% 0.55%
B 7577 7577 1089 1089 14.37% 14.37%
C 7578 7578 734 734 9.69% 9.69%
D 7578 7578 543 543 7.17% 7.17%

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 11 3 153316 770.66 807 788 197.9
A 3 46 118636 595.43 807 788 197.9
A 15 174 88738 444.37 807 788 197.9
B 10 254 3136341 19049.1 761 734 164.6
B 10 44 2236279 13581.14 761 734 164.6
B 7 0 183810 1112.2 761 734 164.6
C 15 224 1955705 9536.06 749 744 205.0
C 13 3 551675 2687.37 749 744 205.0
C 2 12 331390 1612.85 749 744 205.0
D 15 93 3084662 14497.56 760 728 212.7
D 7 96 283604 1329.8 760 728 212.7
D 8 176 226491 1061.31 760 728 212.7

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