ASTROSAT CZTI

Data Quality Report

Orbit 51585

Creation date: 2025-04-12T00:25:08.076438
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_51585cztM0_level2.fits modeM0/AS1A13_037T05_9000006460_51585cztM0_level2_quad_clean.evt
Size (bytes)706,210,56085,757,760
Size673.5 MB 81.8 MB
Events in quadrant A5,530,102650,001
Events in quadrant B3,938,061720,736
Events in quadrant C8,721,027187,823
Events in quadrant D7,396,410540,878

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B050
C050
D050

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0213421
B0165761
C0309001
D0268892

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01460
B01460
C01460
D01460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A71344436.209700%
B71352493.489839%
C7135510571.548704%
D7134113515.909728%

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 7664 7135 223 223 2.91% 3.13%
B 7665 7136 35 35 0.46% 0.49%
C 7665 7135 289 289 3.77% 4.05%
D 7664 7135 957 957 12.49% 13.41%

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 822142 4302.44 777 757 190.9
A 12 250 437350 2286.89 777 757 190.9
A 8 43 274692 1434.88 777 757 190.9
B 0 171 155379 924.66 779 750 167.2
B 5 185 132653 788.76 779 750 167.2
B 0 213 94824 562.55 779 750 167.2
C 15 198 6426884 77048.33 300 299 83.4
C 15 182 177867 2128.86 300 299 83.4
C 15 150 176124 2107.97 300 299 83.4
D 8 176 1362317 6774.22 721 697 201.0
D 5 113 1283547 6382.33 721 697 201.0
D 12 6 932099 4633.84 721 697 201.0

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