ASTROSAT CZTI

Data Quality Report

Orbit 41748

Creation date: 2024-06-27T22:32:22.264072
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/AS1A12_077T11_9000005696_41748cztM0_level2.fits modeM0/AS1A12_077T11_9000005696_41748cztM0_level2_quad_clean.evt
Size (bytes)2,145,830,400467,331,840
Size2.0 GB 445.7 MB
Events in quadrant A15,512,4593,222,318
Events in quadrant B13,722,8513,305,190
Events in quadrant C18,324,9663,012,446
Events in quadrant D29,643,0132,625,625

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01040
B01050
C01050
D01050

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0628448
B0600907
C0727177
D01082287

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A05880
B05880
C05880
D05880

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A28868610.211307%
B28868730.252875%
C288689933.439795%
D28868329411.410558%

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 38546 28873 18 18 0.05% 0.06%
B 38545 28867 37 37 0.10% 0.13%
C 38545 28867 935 935 2.43% 3.24%
D 38545 28867 3564 3564 9.25% 12.35%

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 10 83 2507815 3774.49 3268 3206 663.6
A 2 79 183188 271.24 3268 3206 663.6
A 3 1 62835 89.86 3268 3206 663.6
B 5 255 346738 549.92 3228 3133 624.8
B 0 245 274127 433.71 3228 3133 624.8
B 0 186 270697 428.22 3228 3133 624.8
C 0 10 4506463 6296.38 3090 3108 715.2
C 15 214 1209383 1686.56 3090 3108 715.2
C 14 254 536149 745.27 3090 3108 715.2
D 12 79 11634872 15655.38 3046 2962 743.0
D 2 249 2560643 3442.38 3046 2962 743.0
D 13 249 1295063 1739.04 3046 2962 743.0

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