ASTROSAT CZTI

Data Quality Report

Orbit 52251

Creation date: 2025-07-21T15:20:25.615426
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_011T08_9000006472_52251cztM0_level2.fits modeM0/AS1C09_011T08_9000006472_52251cztM0_level2_quad_clean.evt
Size (bytes)687,096,00091,998,720
Size655.3 MB 87.7 MB
Events in quadrant A4,624,674634,862
Events in quadrant B5,581,682634,769
Events in quadrant C8,635,766511,732
Events in quadrant D6,077,472540,056

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0182151
B0211911
C0302651
D0226531

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01360
B01360
C01360
D01360

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A66492433.654685%
B665076011.428571%
C6650153523.082707%
D66506239.368421%

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 7709 6650 122 122 1.58% 1.83%
B 7710 6651 460 460 5.97% 6.92%
C 7710 6651 1302 1302 16.89% 19.58%
D 7710 6651 560 560 7.26% 8.42%

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 686540 3950.59 702 686 173.6
A 5 240 194877 1118.56 702 686 173.6
A 15 174 186546 1070.57 702 686 173.6
B 12 32 1043376 7370.01 668 644 141.5
B 4 81 275475 1942.5 668 644 141.5
B 10 254 246556 1738.1 668 644 141.5
C 15 224 4421303 25709.49 625 618 171.9
C 9 38 721344 4191.54 625 618 171.9
C 15 189 186114 1078.79 625 618 171.9
D 6 42 2051161 10946.04 663 634 187.3
D 8 176 854531 4558.24 663 634 187.3
D 7 96 98634 523.14 663 634 187.3

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