ASTROSAT CZTI

Data Quality Report

Orbit 52426

Creation date: 2025-06-28T13:50:19.959510
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_52426cztM0_level2.fits modeM0/AS1A13_037T01_9000006476_52426cztM0_level2_quad_clean.evt
Size (bytes)718,254,72069,782,400
Size685.0 MB 66.5 MB
Events in quadrant A2,736,639559,492
Events in quadrant B3,028,009604,596
Events in quadrant C9,904,447399,147
Events in quadrant D10,455,207132,971

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0125521
B0135401
C0334731
D0351503

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01220
B01220
C01220
D01220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A5960530.889262%
B5961791.325281%
C5961180930.347257%
D5960443174.345638%

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 7000 5962 9 9 0.13% 0.15%
B 7001 5963 8 8 0.11% 0.13%
C 7001 5962 2011 2011 28.72% 33.73%
D 6999 5959 2496 2496 35.66% 41.89%

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 4 3 49598 312.66 628 611 156.7
A 3 14 47289 297.92 628 611 156.7
A 8 26 32809 205.5 628 611 156.7
B 4 171 254301 1911.18 619 597 132.7
B 7 0 111842 838.02 619 597 132.7
B 4 81 70927 529.8 619 597 132.7
C 1 45 3578915 23717.73 547 543 150.9
C 9 38 1850660 12262.72 547 543 150.9
C 15 248 854288 5658.69 547 543 150.9
D 12 18 8076054 122805.96 224 214 65.8
D 12 17 843773 12827.65 224 214 65.8
D 12 6 164857 2503.66 224 214 65.8

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