ASTROSAT CZTI

Data Quality Report

Orbit 51550

Creation date: 2025-04-09T15:18:10.077187
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_090T01_9000006458_51550cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51550cztM0_level2_quad_clean.evt
Size (bytes)1,978,899,840201,502,080
Size1.8 GB 192.2 MB
Events in quadrant A24,320,5191,052,271
Events in quadrant B20,801,2341,260,262
Events in quadrant C9,981,5491,462,354
Events in quadrant D16,870,5301,179,747

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0838183
B0731913
C0413895
D0617623

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0160
B0160
C0160
D0160

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A03400
B03400
C03400
D03400

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A16600576034.698795%
B16600433926.138554%
C165994202.530273%
D16600261915.777108%

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 18324 16600 5005 5005 27.31% 30.15%
B 18325 16602 3627 3627 19.79% 21.85%
C 18324 16601 273 273 1.49% 1.64%
D 18325 16602 2481 2481 13.54% 14.94%

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 7594606 20518.76 1496 1459 370.1
A 15 32 3502900 9461.85 1496 1459 370.1
A 12 3 3045489 8225.8 1496 1459 370.1
B 10 44 12319559 35873.54 1609 1548 343.4
B 5 172 455880 1323.14 1609 1548 343.4
B 0 171 257240 744.65 1609 1548 343.4
C 9 38 1253171 2584.14 1751 1732 484.3
C 13 3 818788 1687.17 1751 1732 484.3
C 3 233 380144 781.4 1751 1732 484.3
D 8 176 7639452 16529.44 1644 1585 462.1
D 12 6 1291070 2790.63 1644 1585 462.1
D 6 42 373019 803.84 1644 1585 462.1

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