ASTROSAT CZTI

Data Quality Report

Orbit 51803

Creation date: 2025-04-26T16:48:34.639750
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_090T01_9000006464_51803cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51803cztM0_level2_quad_clean.evt
Size (bytes)791,429,76088,272,000
Size754.8 MB 84.2 MB
Events in quadrant A7,551,637587,634
Events in quadrant B6,612,515625,252
Events in quadrant C5,350,084570,819
Events in quadrant D9,244,811405,319

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A050
B050
C050
D050

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01380
B01380
C01380
D01380

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0273911
B0244761
C0205771
D0322261

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A694770810.191450%
B694795813.790125%
C69476389.183820%
D6947233833.654815%

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 7362 6948 340 340 4.62% 4.89%
B 7362 6948 583 583 7.92% 8.39%
C 7362 6948 363 363 4.93% 5.22%
D 7361 6947 2016 2016 27.39% 29.02%

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 2763440 15208.55 739 721 181.7
A 13 248 514358 2827.53 739 721 181.7
A 3 14 318019 1746.7 739 721 181.7
B 10 128 1488162 9428.16 729 703 157.8
B 10 44 968843 6136.49 729 703 157.8
B 4 206 213581 1349.31 729 703 157.8
C 10 22 819503 4224.43 708 703 193.8
C 13 3 550442 2836.27 708 703 193.8
C 15 218 545790 2812.26 708 703 193.8
D 11 129 5439320 32550.16 606 586 167.1
D 12 6 483777 2891.84 606 586 167.1
D 8 176 352773 2107.79 606 586 167.1

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