ASTROSAT CZTI

Data Quality Report

Orbit 51171

Creation date: 2025-03-15T09:18:29.769270
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_9000006454_51171cztM0_level2.fits modeM0/AS1C07_001T01_9000006454_51171cztM0_level2_quad_clean.evt
Size (bytes)1,068,661,44072,216,000
Size1019.2 MB 68.9 MB
Events in quadrant A14,300,892253,949
Events in quadrant B4,308,720677,552
Events in quadrant C15,209,811214,236
Events in quadrant D5,210,438562,911

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0472017
B0175982
C0498222
D0203742

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01400
B01400
C01400
D01400

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0110
B0120
C0120
D0120

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6850450565.766423%
B68502443.562044%
C6850485370.846715%
D68504586.686131%

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 7750 6851 4370 4370 56.39% 63.79%
B 7750 6851 144 144 1.86% 2.10%
C 7750 6851 4862 4862 62.74% 70.97%
D 7750 6851 377 377 4.86% 5.50%

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 4 207 6986719 56512.67 486 472 123.6
A 14 254 2124500 17181.54 486 472 123.6
A 12 80 1348605 10905.22 486 472 123.6
B 5 185 441668 2895.81 707 682 152.3
B 8 128 257361 1685.52 707 682 152.3
B 10 60 155742 1018.23 707 682 152.3
C 12 247 9179105 68731.86 486 481 133.5
C 4 12 3245144 24296.86 486 481 133.5
C 13 3 200833 1500.29 486 481 133.5
D 7 96 485911 2549.22 681 659 190.4
D 3 12 329121 1725.54 681 659 190.4
D 8 176 322397 1690.21 681 659 190.4

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