ASTROSAT CZTI

Data Quality Report

Orbit 51679

Creation date: 2025-04-22T12:01:07.218277
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_031T01_9000006462_51679cztM0_level2.fits modeM0/AS1A13_031T01_9000006462_51679cztM0_level2_quad_clean.evt
Size (bytes)511,243,200102,075,840
Size487.6 MB 97.3 MB
Events in quadrant A4,053,552658,636
Events in quadrant B4,824,571698,252
Events in quadrant C5,672,068626,268
Events in quadrant D3,812,087603,426

Level1 data integrity


Mode M9
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0150
B0150
C0150
D0150

Mode M0
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A0171992
B0193272
C0218716
D0169602

Mode SS
QuadrantBADHDUFLAGTotal packetsDiscarded packets
A01500
B01500
C01500
D01500

Data saturation


QuadrantTotal secondsSaturated secondsSaturation percentage
A72371572.169407%
B72384185.775076%
C72374776.591129%
D72371391.920685%

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 8748 7239 101 101 1.15% 1.40%
B 8749 7239 335 335 3.83% 4.63%
C 8747 7237 379 379 4.33% 5.24%
D 8748 7240 111 111 1.27% 1.53%

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 321073 1723.52 755 737 185.9
A 13 248 188222 1008.74 755 737 185.9
A 5 240 141774 758.83 755 737 185.9
B 6 51 634368 3957.89 746 718 160.1
B 5 172 570115 3556.56 746 718 160.1
B 1 223 108978 676.21 746 718 160.1
C 15 189 904559 4532.6 729 723 199.4
C 5 250 476496 2385.93 729 723 199.4
C 13 3 448513 2245.6 729 723 199.4
D 6 42 240539 1178.26 730 705 203.5
D 2 120 205352 1005.39 730 705 203.5
D 8 176 203088 994.27 730 705 203.5

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