ASTROSAT CZTI

Data Quality Report

Orbit 52855

Creation date: 2025-07-16T10:47:33.088977
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_011T08_9000006482_52855cztM0_level2.fits modeM0/AS1C09_011T08_9000006482_52855cztM0_level2_quad_clean.evt
Size (bytes)705,055,68085,844,160
Size672.4 MB 81.9 MB
Events in quadrant A5,630,554599,147
Events in quadrant B8,480,768511,125
Events in quadrant C3,692,368566,784
Events in quadrant D7,804,283478,640

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0212031
B0296291
C0154721
D0276441

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A080
B080
C080
D080

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01280
B01280
C01280
D01280

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A63532684.218479%
B6354166126.141014%
C63531872.943491%
D6353115818.227609%

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 7123 6354 197 197 2.77% 3.10%
B 7124 6355 1175 1175 16.49% 18.49%
C 7123 6354 161 161 2.26% 2.53%
D 7123 6354 1076 1076 15.11% 16.93%

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 9 191 1553450 9408.45 656 639 165.0
A 3 14 692607 4192.62 656 639 165.0
A 3 62 463231 2802.84 656 639 165.0
B 8 3 5568097 42754.04 608 588 130.2
B 1 255 135409 1035.32 608 588 130.2
B 0 171 78655 599.49 608 588 130.2
C 13 3 479637 2707.87 633 628 176.9
C 15 224 190652 1074.21 633 628 176.9
C 10 171 71038 398.03 633 628 176.9
D 8 176 2467051 14370.08 598 571 171.6
D 12 2 1929994 11241.1 598 571 171.6
D 3 224 523156 3044.66 598 571 171.6

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