ASTROSAT CZTI

Data Quality Report

Orbit 51476

Creation date: 2025-04-04T18:05:06.768405
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_51476cztM0_level2.fits modeM0/AS1A13_090T01_9000006458_51476cztM0_level2_quad_clean.evt
Size (bytes)2,731,504,320418,282,560
Size2.5 GB 398.9 MB
Events in quadrant A25,870,5692,624,895
Events in quadrant B16,114,1933,089,239
Events in quadrant C20,146,0682,659,525
Events in quadrant D36,588,9072,160,101

Level1 data integrity


Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0981976
B0697255
C0819365
D01301105

Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0220
B0220
C0220
D0220

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A06260
B06260
C06260
D06260

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A30993337510.889556%
B309936792.190817%
C3099419646.336710%
D30994644520.794347%

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 33053 30996 1828 1828 5.53% 5.90%
B 33053 30997 159 159 0.48% 0.51%
C 33054 30998 1245 1245 3.77% 4.02%
D 33054 30997 5610 5610 16.97% 18.10%

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 12 250 6813138 8660.21 3221 3140 786.4
A 12 3 2001164 2540.87 3221 3140 786.4
A 5 240 589716 745.94 3221 3140 786.4
B 8 128 437900 611.25 3307 3180 711.2
B 8 234 433021 604.39 3307 3180 711.2
B 10 254 387544 540.45 3307 3180 711.2
C 15 215 2007756 2290.6 3208 3183 875.1
C 13 3 1903083 2170.99 3208 3183 875.1
C 15 147 946635 1078.07 3208 3183 875.1
D 8 176 17461384 20709.82 2994 2890 843.0
D 6 42 1609161 1905.41 2994 2890 843.0
D 7 60 1054539 1247.5 2994 2890 843.0

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