ASTROSAT CZTI

Data Quality Report

Orbit 56879

Creation date: 2026-04-03T08:56:38.198907
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_083T03_9000006562_56879cztM0_level2.fits modeM0/AS1A14_083T03_9000006562_56879cztM0_level2_quad_clean.evt
Size (bytes)1,305,918,720253,172,160
Size1.2 GB 241.4 MB
Events in quadrant A13,973,1861,572,026
Events in quadrant B10,095,2281,769,583
Events in quadrant C9,195,5401,606,744
Events in quadrant D13,636,3161,434,200

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0170
B0170
C0170
D0170

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03760
B03760
C03760
D03760

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0551323
B0438014
C0410113
D0538173

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A1861914577.825340%
B186187984.286175%
C186191700.913046%
D1861911436.138890%

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 20188 18619 1342 1342 6.65% 7.21%
B 20187 18618 527 527 2.61% 2.83%
C 20188 18619 154 154 0.76% 0.83%
D 20188 18619 1104 1104 5.47% 5.93%

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 10 251 4836055 10412.32 1883 1835 464.3
A 7 64 1141446 2454.58 1883 1835 464.3
A 3 14 491349 1054.35 1883 1835 464.3
B 10 16 1382470 3467.32 1863 1792 398.2
B 5 185 909125 2278.6 1863 1792 398.2
B 0 245 96885 238.81 1863 1792 398.2
C 13 3 892475 1745.92 1875 1857 510.1
C 1 16 235726 458.46 1875 1857 510.1
C 14 254 172440 334.4 1875 1857 510.1
D 2 249 1667365 3284.01 1815 1735 507.2
D 8 240 1434936 2825.74 1815 1735 507.2
D 11 129 990666 1949.81 1815 1735 507.2

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