ASTROSAT CZTI

Data Quality Report

Orbit 52655

Creation date: 2025-06-23T17:43:43.261039
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/AS1C09_011T07_9000006480_52655cztM0_level2.fits modeM0/AS1C09_011T07_9000006480_52655cztM0_level2_quad_clean.evt
Size (bytes)1,559,563,200128,295,360
Size1.5 GB 122.4 MB
Events in quadrant A6,371,4291,066,941
Events in quadrant B17,067,636739,861
Events in quadrant C18,634,651505,614
Events in quadrant D14,773,457778,283

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0110
C0110
D0110

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02340
B02340
C02340
D02340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0267663
B0586403
C06339312
D0518823

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A114493693.222989%
B11450480441.956332%
C11448592351.738295%
D11450277924.270742%

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 37485 11452 106 106 0.28% 0.93%
B 37486 11452 3960 3960 10.56% 34.58%
C 37484 11450 5588 5588 14.91% 48.80%
D 37485 11451 2538 2538 6.77% 22.16%

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 3 14 323358 1087.8 1197 1168 296.2
A 14 239 278580 936.62 1197 1168 296.2
A 3 114 260810 876.62 1197 1168 296.2
B 10 128 7504164 35126.62 1006 972 213.6
B 12 32 3391548 15873.18 1006 972 213.6
B 10 247 609816 2850.34 1006 972 213.6
C 15 233 9972333 46273.32 782 773 215.5
C 15 158 2347869 10891.77 782 773 215.5
C 2 239 629135 2915.93 782 773 215.5
D 8 176 1953384 6435.72 1056 1006 303.4
D 1 7 1871115 6164.53 1056 1006 303.4
D 15 125 1848779 6090.91 1056 1006 303.4

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