ASTROSAT CZTI

Data Quality Report

Orbit 50894

Creation date: 2025-02-24T13:07:58.457797
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/AS1C07_001T01_9000006450_50894cztM0_level2.fits modeM0/AS1C07_001T01_9000006450_50894cztM0_level2_quad_clean.evt
Size (bytes)3,263,826,240276,419,520
Size3.0 GB 263.6 MB
Events in quadrant A34,253,7831,704,623
Events in quadrant B12,955,3942,484,119
Events in quadrant C37,706,4301,149,389
Events in quadrant D33,982,3191,314,674

Level1 data integrity


Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05072
B05084
C05053
D05084

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0119991952
B056834312
C01304731114
D0119470786

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0150
C0150
D0150

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A24916698228.022154%
B249515042.019959%
C248991203248.323226%
D24923842333.796092%

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 26575 24961 6160 6160 23.18% 24.68%
B 26575 24996 235 235 0.88% 0.94%
C 26574 24934 6797 6797 25.58% 27.26%
D 26575 24963 6689 6689 25.17% 26.80%

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 4 16159102 27078.8 2403 2334 596.7
A 7 207 4264999 7144.24 2403 2334 596.7
A 4 249 780067 1303.48 2403 2334 596.7
B 4 206 342667 610.22 2613 2515 557.4
B 0 171 317352 564.8 2613 2515 557.4
B 8 128 282561 502.39 2613 2515 557.4
C 1 29 11954247 22739.46 1881 1866 525.6
C 4 210 8980928 17082.71 1881 1866 525.6
C 12 247 1729861 3287.52 1881 1866 525.6
D 15 184 10288436 17316.1 2120 2047 594.0
D 7 45 4772967 8031.36 2120 2047 594.0
D 15 108 1910144 3212.09 2120 2047 594.0

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