ASTROSAT CZTI

Data Quality Report

Orbit 52478

Creation date: 2025-06-26T16:19:24.309550
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_037T01_9000006476_52478cztM0_level2.fits modeM0/AS1A13_037T01_9000006476_52478cztM0_level2_quad_clean.evt
Size (bytes)825,396,48072,100,800
Size787.2 MB 68.8 MB
Events in quadrant A4,031,086571,550
Events in quadrant B5,629,771639,665
Events in quadrant C4,429,795535,942
Events in quadrant D15,977,857154

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0100
B0100
C0100
D0100

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0164771
B0209201
C0177611
D0517871

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01240
B01240
C01240
D01240

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A62504447.104000%
B62502704.320000%
C62514597.342825%
D6251625099.984003%

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 7185 6251 344 344 4.79% 5.50%
B 7185 6251 289 289 4.02% 4.62%
C 7186 6252 329 329 4.58% 5.26%
D 7185 6250 6008 6008 83.62% 96.13%

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 4 61 514606 3227.83 637 622 159.2
A 10 17 456741 2864.44 637 622 159.2
A 8 249 99432 620.53 637 622 159.2
B 10 254 2448217 17179.02 660 636 142.5
B 4 171 150887 1054.58 660 636 142.5
B 10 44 130477 911.32 660 636 142.5
C 15 224 642675 3727.23 630 625 172.3
C 12 254 384815 2230.3 630 625 172.3
C 13 3 306336 1774.72 630 625 172.3
D 15 93 11830106 255112.76 156 148 46.4
D 6 42 3201219 69031.02 156 148 46.4
D 8 176 159798 3442.85 156 148 46.4

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