ASTROSAT CZTI

Data Quality Report

Orbit 52496

Creation date: 2025-06-25T14:30:51.985263
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_52496cztM0_level2.fits modeM0/AS1A13_037T01_9000006476_52496cztM0_level2_quad_clean.evt
Size (bytes)5,258,511,360414,705,600
Size4.9 GB 395.5 MB
Events in quadrant A21,334,3433,502,438
Events in quadrant B33,944,3923,365,160
Events in quadrant C51,340,8462,388,403
Events in quadrant D85,215,977779,885

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0510
B0510
C0510
D0510

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0897830
B01259980
C01778100
D02785100

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A07460
B07460
C07460
D07460

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A3664918835.137930%
B36652572915.630798%
C366511204032.850400%
D366512863378.123380%

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 41811 36655 1169 1169 2.80% 3.19%
B 41812 36656 4526 4526 10.82% 12.35%
C 41812 36656 10212 10212 24.42% 27.86%
D 41811 36652 28170 28170 67.37% 76.86%

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 8 26 2523474 2573.37 3932 3832 979.1
A 3 45 1641805 1672.9 3932 3832 979.1
A 11 3 315139 317.95 3932 3832 979.1
B 10 44 14558568 18457.61 3677 3544 788.6
B 10 254 2200422 2785.92 3677 3544 788.6
B 4 81 648486 817.87 3677 3544 788.6
C 15 224 27708826 31348.01 3236 3213 883.8
C 2 12 4386148 4959.15 3236 3213 883.8
C 15 248 2267019 2561.42 3236 3213 883.8
D 15 93 57144794 95325.9 2094 1998 599.4
D 6 42 14633616 24408.54 2094 1998 599.4
D 2 62 1440315 2399.41 2094 1998 599.4

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