ASTROSAT CZTI

Data Quality Report

Orbit 57518

Creation date: 2026-05-16T08:29:57.766765
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/AS1A14_113T09_9000006574_57518cztM0_level2.fits modeM0/AS1A14_113T09_9000006574_57518cztM0_level2_quad_clean.evt
Size (bytes)1,269,838,080274,236,480
Size1.2 GB 261.5 MB
Events in quadrant A8,678,6501,870,331
Events in quadrant B9,392,8921,915,507
Events in quadrant C14,688,1961,637,242
Events in quadrant D12,775,8161,572,169

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03840
B03840
C03840
D03840

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0150
C0150
D0150

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0403683
B0412643
C0568443
D0514803

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A189851400.737424%
B189862801.474771%
C1898613727.226377%
D1898612326.488992%

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 20416 18988 17 17 0.08% 0.09%
B 20417 18989 41 41 0.20% 0.22%
C 20417 18989 1035 1035 5.07% 5.45%
D 20417 18989 763 763 3.74% 4.02%

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 3 14 325278 631.13 2073 2022 512.2
A 13 248 121877 234.01 2073 2022 512.2
A 7 14 101610 194.44 2073 2022 512.2
B 4 206 535483 1238.1 2025 1946 430.9
B 7 252 136420 312.05 2025 1946 430.9
B 2 249 136284 311.74 2025 1946 430.9
C 15 224 6438392 12167.49 1940 1918 529.0
C 14 246 169568 316.92 1940 1918 529.0
C 14 254 159299 297.51 1940 1918 529.0
D 8 240 2874805 5196.85 1935 1844 552.8
D 15 142 678287 1223.61 1935 1844 552.8
D 2 31 499686 900.54 1935 1844 552.8

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