ASTROSAT CZTI

Data Quality Report

Orbit 20171012_A04_130T03_9000001602_level2

Creation date: 2025-11-17T16:48:23.637477
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/AS1A04_130T03_9000001602cztM0_level2.fits modeM0/AS1A04_130T03_9000001602cztM0_level2_quad_clean.evt
Size (bytes)170,032,320138,326,400
Size162.2 MB 131.9 MB
Events in quadrant A1,003,951690,742
Events in quadrant B988,626765,354
Events in quadrant C1,029,926777,788
Events in quadrant D886,264715,084

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03700
B03700
C03720
D03700

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0260
B0260
C0260
D0260

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0602530
B0493540
C0372570
D0459780

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A17859195410.941262%
B1795413927.753147%
C180053121.732852%
D180068964.976119%

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 20962 18103 0 0 0.00% 0.00%
B 20962 18155 0 0 0.00% 0.00%
C 20962 18188 0 0 0.00% 0.00%
D 20962 18170 0 0 0.00% 0.00%

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 14 188 1022 11.95 260 245 65.0
A 0 29 939 10.67 260 245 65.0
A 14 204 829 8.98 260 245 65.0
B 2 9 784 10.26 260 248 52.3
B 14 254 667 8.02 260 248 52.3
B 5 225 665 7.98 260 248 52.3
C 1 81 765 7.03 272 253 72.9
C 1 80 758 6.93 272 253 72.9
C 12 241 715 6.34 272 253 72.9
D 3 14 684 6.57 252 230 69.1
D 6 231 639 5.92 252 230 69.1
D 1 31 625 5.72 252 230 69.1

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