ASTROSAT CZTI

Data Quality Report

Orbit 54888

Creation date: 2025-11-20T09:45:29.658363
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_039T06_9000006526_54888cztM0_level2.fits modeM0/AS1A14_039T06_9000006526_54888cztM0_level2_quad_clean.evt
Size (bytes)810,267,840174,784,320
Size772.7 MB 166.7 MB
Events in quadrant A7,340,6771,137,238
Events in quadrant B6,378,9691,232,475
Events in quadrant C6,724,5441,076,267
Events in quadrant D8,592,821992,536

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A020
B020
C020
D020

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03065542
B02811839
C02921642
D03465064

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A02500
B02500
C02500
D02500

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A123432672.163169%
B123411891.531480%
C123413192.584880%
D123387165.803210%

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 12567 12358 97 97 0.77% 0.78%
B 12567 12356 73 73 0.58% 0.59%
C 12568 12356 266 266 2.12% 2.15%
D 12568 12354 490 490 3.90% 3.97%

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 3 14 1553441 4751.81 1316 1280 326.6
A 0 8 292483 891.49 1316 1280 326.6
A 7 14 172557 524.35 1316 1280 326.6
B 2 249 615171 2186.34 1305 1254 280.8
B 5 185 256786 910.02 1305 1254 280.8
B 7 0 122770 432.75 1305 1254 280.8
C 15 147 654620 1903.11 1268 1260 343.3
C 14 254 308598 895.22 1268 1260 343.3
C 4 5 290381 842.15 1268 1260 343.3
D 11 176 547407 1545.19 1248 1194 353.5
D 15 94 468363 1321.58 1248 1194 353.5
D 6 239 397822 1122.03 1248 1194 353.5

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