ASTROSAT CZTI

Data Quality Report

Orbit 55949

Creation date: 2026-02-05T19:46:45.425502
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_066T02_9000006546_55949cztM0_level2.fits modeM0/AS1A14_066T02_9000006546_55949cztM0_level2_quad_clean.evt
Size (bytes)1,385,337,600254,946,240
Size1.3 GB 243.1 MB
Events in quadrant A11,141,9921,658,442
Events in quadrant B8,630,1261,825,426
Events in quadrant C12,138,0981,554,480
Events in quadrant D17,903,8281,374,769

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0465383
B0398183
C0505923
D0663639

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03860
B03860
C03860
D03860

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A189479064.781760%
B189484342.290479%
C1894814027.399198%
D18946258413.638763%

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 20187 18950 506 506 2.51% 2.67%
B 20188 18951 26 26 0.13% 0.14%
C 20188 18951 743 743 3.68% 3.92%
D 20188 18950 2424 2424 12.01% 12.79%

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 7 64 1167018 2358.06 1996 1939 494.1
A 12 115 907270 1832.35 1996 1939 494.1
A 3 14 803260 1621.83 1996 1939 494.1
B 0 171 153562 357.3 1984 1908 424.4
B 4 21 115517 267.67 1984 1908 424.4
B 0 213 110395 255.6 1984 1908 424.4
C 12 252 2411155 4646.05 1888 1871 518.6
C 1 29 923804 1777.85 1888 1871 518.6
C 6 9 612700 1177.92 1888 1871 518.6
D 11 129 8814455 16570.09 1875 1793 531.8
D 1 31 328858 614.97 1875 1793 531.8
D 2 31 270496 505.23 1875 1793 531.8

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