ASTROSAT CZTI

Data Quality Report

Orbit 51918

Creation date: 2025-05-04T10:23:11.692813
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_011T05_9000006466_51918cztM0_level2.fits modeM0/AS1C09_011T05_9000006466_51918cztM0_level2_quad_clean.evt
Size (bytes)839,810,88070,620,480
Size800.9 MB 67.3 MB
Events in quadrant A9,126,955398,682
Events in quadrant B7,239,952450,896
Events in quadrant C5,619,178505,068
Events in quadrant D8,623,917352,521

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01240
B01240
C01240
D01240

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0313971
B0259193
C0211101
D0299631

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6173199032.237162%
B6172182829.617628%
C617376712.425077%
D6173213034.505103%

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 7083 6173 1872 1872 26.43% 30.33%
B 7082 6173 1346 1346 19.01% 21.80%
C 7083 6174 595 595 8.40% 9.64%
D 7083 6174 1792 1792 25.30% 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 8 248 2843196 22302.94 505 492 127.5
A 7 64 1954759 15332.55 505 492 127.5
A 12 3 1061562 8324.81 505 492 127.5
B 4 206 4233658 37643.62 525 508 112.5
B 12 32 281706 2500.58 525 508 112.5
B 4 171 170863 1514.9 525 508 112.5
C 15 158 2190554 13731.68 578 575 159.5
C 4 5 237102 1483.08 578 575 159.5
C 13 3 131020 817.92 578 575 159.5
D 15 94 3616558 27121.79 464 442 133.3
D 3 12 742449 5565.24 464 442 133.3
D 12 17 645703 4839.62 464 442 133.3

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