ASTROSAT CZTI

Data Quality Report

Orbit 52481

Creation date: 2025-06-25T17:08:42.505206
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_52481cztM0_level2.fits modeM0/AS1A13_037T01_9000006476_52481cztM0_level2_quad_clean.evt
Size (bytes)741,723,84070,997,760
Size707.4 MB 67.7 MB
Events in quadrant A2,895,450589,266
Events in quadrant B3,475,551631,027
Events in quadrant C5,345,148509,072
Events in quadrant D15,273,3501,033

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0120
B0120
C0120
D0120

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0128652
B0144871
C0201461
D0495201

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01220
B01220
C01220
D01220

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A6001130.216631%
B60021201.999334%
C600267111.179607%
D6002599399.850050%

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 7181 6002 8 8 0.11% 0.13%
B 7182 6003 57 57 0.79% 0.95%
C 7182 6003 591 591 8.23% 9.85%
D 7181 6001 5800 5800 80.77% 96.65%

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 8 249 289854 1815.28 637 621 159.3
A 4 3 47847 296.4 637 621 159.3
A 3 14 20273 123.34 637 621 159.3
B 10 254 305943 2239.98 634 611 136.3
B 4 171 282274 2066.33 634 611 136.3
B 10 44 147289 1076.06 634 611 136.3
C 15 224 2112069 12790.91 597 592 165.1
C 13 3 268519 1623.05 597 592 165.1
C 2 12 232371 1404.07 597 592 165.1
D 15 93 13680612 379038.55 119 113 36.1
D 6 42 980515 27163.49 119 113 36.1
D 8 176 38400 1060.8 119 113 36.1

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