ASTROSAT CZTI

Data Quality Report

Orbit 51797

Creation date: 2025-04-26T06:04:12.226163
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_51797cztM0_level2.fits modeM0/AS1A13_090T01_9000006464_51797cztM0_level2_quad_clean.evt
Size (bytes)800,352,00082,615,680
Size763.3 MB 78.8 MB
Events in quadrant A8,381,841470,583
Events in quadrant B4,586,528651,383
Events in quadrant C6,186,612538,408
Events in quadrant D9,960,024379,933

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0130
C0130
D0130

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01340
B01340
C01340
D01340

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0294033
B0182142
C0228692
D0341712

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6610172126.036309%
B66103755.673222%
C661085512.934947%
D6610243336.807867%

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 7604 6610 1672 1672 21.99% 25.30%
B 7605 6610 230 230 3.02% 3.48%
C 7605 6611 829 829 10.90% 12.54%
D 7605 6610 2358 2358 31.01% 35.67%

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 15 174 4224702 27463.85 612 596 153.8
A 12 3 440457 2859.84 612 596 153.8
A 7 64 293563 1904.78 612 596 153.8
B 10 128 807711 5417.99 692 670 149.0
B 4 81 178075 1190.99 692 670 149.0
B 0 171 169503 1133.44 692 670 149.0
C 15 218 2383313 13187.8 654 650 180.7
C 10 22 456523 2523.21 654 650 180.7
C 15 192 288332 1592.29 654 650 180.7
D 11 129 6248893 40521.93 554 533 154.2
D 12 6 428816 2777.51 554 533 154.2
D 8 176 409632 2653.09 554 533 154.2

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